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    45. 

  45.   <h1>Source code for flask.blueprints</h1><div class="highlight"><pre>
    46. 

  46. <span></span><span class="c1"># -*- coding: utf-8 -*-</span>
    47. 

  47. <span class="sd">&quot;&quot;&quot;</span>
    48. 

  48. <span class="sd">    flask.blueprints</span>
    49. 

  49. <span class="sd">    ~~~~~~~~~~~~~~~~</span>
    50. 

  50. 

  51. <span class="sd">    Blueprints are the recommended way to implement larger or more</span>
    52. 

  52. <span class="sd">    pluggable applications in Flask 0.7 and later.</span>
    53. 

  53. 

  54. <span class="sd">    :copyright: (c) 2015 by Armin Ronacher.</span>
    55. 

  55. <span class="sd">    :license: BSD, see LICENSE for more details.</span>
    56. 

  56. <span class="sd">&quot;&quot;&quot;</span>
    57. 

  57. <span class="kn">from</span> <span class="nn">functools</span> <span class="k">import</span> <span class="n">update_wrapper</span>
    58. 

  58. 

  59. <span class="kn">from</span> <span class="nn">.helpers</span> <span class="k">import</span> <span class="n">_PackageBoundObject</span><span class="p">,</span> <span class="n">_endpoint_from_view_func</span>
    60. 

  60. 

  61. 

  62. <div class="viewcode-block" id="BlueprintSetupState"><a class="viewcode-back" href="../../flask/flask.html#flask.blueprints.BlueprintSetupState">[docs]</a><span class="k">class</span> <span class="nc">BlueprintSetupState</span><span class="p">(</span><span class="nb">object</span><span class="p">):</span>
    63. 

  63.     <span class="sd">&quot;&quot;&quot;Temporary holder object for registering a blueprint with the</span>
    64. 

  64. <span class="sd">    application.  An instance of this class is created by the</span>
    65. 

  65. <span class="sd">    :meth:`~flask.Blueprint.make_setup_state` method and later passed</span>
    66. 

  66. <span class="sd">    to all register callback functions.</span>
    67. 

  67. <span class="sd">    &quot;&quot;&quot;</span>
    68. 

  68. 

  69.     <span class="k">def</span> <span class="nf">__init__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">blueprint</span><span class="p">,</span> <span class="n">app</span><span class="p">,</span> <span class="n">options</span><span class="p">,</span> <span class="n">first_registration</span><span class="p">):</span>
    70. 

  70.         <span class="c1">#: a reference to the current application</span>
    71. 

  71.         <span class="bp">self</span><span class="o">.</span><span class="n">app</span> <span class="o">=</span> <span class="n">app</span>
    72. 

  72. 

  73.         <span class="c1">#: a reference to the blueprint that created this setup state.</span>
    74. 

  74.         <span class="bp">self</span><span class="o">.</span><span class="n">blueprint</span> <span class="o">=</span> <span class="n">blueprint</span>
    75. 

  75. 

  76.         <span class="c1">#: a dictionary with all options that were passed to the</span>
    77. 

  77.         <span class="c1">#: :meth:`~flask.Flask.register_blueprint` method.</span>
    78. 

  78.         <span class="bp">self</span><span class="o">.</span><span class="n">options</span> <span class="o">=</span> <span class="n">options</span>
    79. 

  79. 

  80.         <span class="c1">#: as blueprints can be registered multiple times with the</span>
    81. 

  81.         <span class="c1">#: application and not everything wants to be registered</span>
    82. 

  82.         <span class="c1">#: multiple times on it, this attribute can be used to figure</span>
    83. 

  83.         <span class="c1">#: out if the blueprint was registered in the past already.</span>
    84. 

  84.         <span class="bp">self</span><span class="o">.</span><span class="n">first_registration</span> <span class="o">=</span> <span class="n">first_registration</span>
    85. 

  85. 

  86.         <span class="n">subdomain</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">options</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s1">&#39;subdomain&#39;</span><span class="p">)</span>
    87. 

  87.         <span class="k">if</span> <span class="n">subdomain</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span>
    88. 

  88.             <span class="n">subdomain</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">blueprint</span><span class="o">.</span><span class="n">subdomain</span>
    89. 

  89. 

  90.         <span class="c1">#: The subdomain that the blueprint should be active for, ``None``</span>
    91. 

  91.         <span class="c1">#: otherwise.</span>
    92. 

  92.         <span class="bp">self</span><span class="o">.</span><span class="n">subdomain</span> <span class="o">=</span> <span class="n">subdomain</span>
    93. 

  93. 

  94.         <span class="n">url_prefix</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">options</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s1">&#39;url_prefix&#39;</span><span class="p">)</span>
    95. 

  95.         <span class="k">if</span> <span class="n">url_prefix</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span>
    96. 

  96.             <span class="n">url_prefix</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">blueprint</span><span class="o">.</span><span class="n">url_prefix</span>
    97. 

  97. 

  98.         <span class="c1">#: The prefix that should be used for all URLs defined on the</span>
    99. 

  99.         <span class="c1">#: blueprint.</span>
    100. 

  100.         <span class="bp">self</span><span class="o">.</span><span class="n">url_prefix</span> <span class="o">=</span> <span class="n">url_prefix</span>
    101. 

  101. 

  102.         <span class="c1">#: A dictionary with URL defaults that is added to each and every</span>
    103. 

  103.         <span class="c1">#: URL that was defined with the blueprint.</span>
    104. 

  104.         <span class="bp">self</span><span class="o">.</span><span class="n">url_defaults</span> <span class="o">=</span> <span class="nb">dict</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">blueprint</span><span class="o">.</span><span class="n">url_values_defaults</span><span class="p">)</span>
    105. 

  105.         <span class="bp">self</span><span class="o">.</span><span class="n">url_defaults</span><span class="o">.</span><span class="n">update</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">options</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s1">&#39;url_defaults&#39;</span><span class="p">,</span> <span class="p">()))</span>
    106. 

  106. 

  107. <div class="viewcode-block" id="BlueprintSetupState.add_url_rule"><a class="viewcode-back" href="../../flask/flask.html#flask.blueprints.BlueprintSetupState.add_url_rule">[docs]</a>    <span class="k">def</span> <span class="nf">add_url_rule</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">rule</span><span class="p">,</span> <span class="n">endpoint</span><span class="o">=</span><span class="kc">None</span><span class="p">,</span> <span class="n">view_func</span><span class="o">=</span><span class="kc">None</span><span class="p">,</span> <span class="o">**</span><span class="n">options</span><span class="p">):</span>
    108. 

  108.         <span class="sd">&quot;&quot;&quot;A helper method to register a rule (and optionally a view function)</span>
    109. 

  109. <span class="sd">        to the application.  The endpoint is automatically prefixed with the</span>
    110. 

  110. <span class="sd">        blueprint&#39;s name.</span>
    111. 

  111. <span class="sd">        &quot;&quot;&quot;</span>
    112. 

  112.         <span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">url_prefix</span><span class="p">:</span>
    113. 

  113.             <span class="n">rule</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">url_prefix</span> <span class="o">+</span> <span class="n">rule</span>
    114. 

  114.         <span class="n">options</span><span class="o">.</span><span class="n">setdefault</span><span class="p">(</span><span class="s1">&#39;subdomain&#39;</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">subdomain</span><span class="p">)</span>
    115. 

  115.         <span class="k">if</span> <span class="n">endpoint</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span>
    116. 

  116.             <span class="n">endpoint</span> <span class="o">=</span> <span class="n">_endpoint_from_view_func</span><span class="p">(</span><span class="n">view_func</span><span class="p">)</span>
    117. 

  117.         <span class="n">defaults</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">url_defaults</span>
    118. 

  118.         <span class="k">if</span> <span class="s1">&#39;defaults&#39;</span> <span class="ow">in</span> <span class="n">options</span><span class="p">:</span>
    119. 

  119.             <span class="n">defaults</span> <span class="o">=</span> <span class="nb">dict</span><span class="p">(</span><span class="n">defaults</span><span class="p">,</span> <span class="o">**</span><span class="n">options</span><span class="o">.</span><span class="n">pop</span><span class="p">(</span><span class="s1">&#39;defaults&#39;</span><span class="p">))</span>
    120. 

  120.         <span class="bp">self</span><span class="o">.</span><span class="n">app</span><span class="o">.</span><span class="n">add_url_rule</span><span class="p">(</span><span class="n">rule</span><span class="p">,</span> <span class="s1">&#39;</span><span class="si">%s</span><span class="s1">.</span><span class="si">%s</span><span class="s1">&#39;</span> <span class="o">%</span> <span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">blueprint</span><span class="o">.</span><span class="n">name</span><span class="p">,</span> <span class="n">endpoint</span><span class="p">),</span>
    121. 

  121.                               <span class="n">view_func</span><span class="p">,</span> <span class="n">defaults</span><span class="o">=</span><span class="n">defaults</span><span class="p">,</span> <span class="o">**</span><span class="n">options</span><span class="p">)</span></div></div>
    122. 

  122. 

  123. 

  124. <div class="viewcode-block" id="Blueprint"><a class="viewcode-back" href="../../flask/flask.html#flask.blueprints.Blueprint">[docs]</a><span class="k">class</span> <span class="nc">Blueprint</span><span class="p">(</span><span class="n">_PackageBoundObject</span><span class="p">):</span>
    125. 

  125.     <span class="sd">&quot;&quot;&quot;Represents a blueprint.  A blueprint is an object that records</span>
    126. 

  126. <span class="sd">    functions that will be called with the</span>
    127. 

  127. <span class="sd">    :class:`~flask.blueprints.BlueprintSetupState` later to register functions</span>
    128. 

  128. <span class="sd">    or other things on the main application.  See :ref:`blueprints` for more</span>
    129. 

  129. <span class="sd">    information.</span>
    130. 

  130. 

  131. <span class="sd">    .. versionadded:: 0.7</span>
    132. 

  132. <span class="sd">    &quot;&quot;&quot;</span>
    133. 

  133. 

  134.     <span class="n">warn_on_modifications</span> <span class="o">=</span> <span class="kc">False</span>
    135. 

  135.     <span class="n">_got_registered_once</span> <span class="o">=</span> <span class="kc">False</span>
    136. 

  136. 

  137.     <span class="k">def</span> <span class="nf">__init__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">name</span><span class="p">,</span> <span class="n">import_name</span><span class="p">,</span> <span class="n">static_folder</span><span class="o">=</span><span class="kc">None</span><span class="p">,</span>
    138. 

  138.                  <span class="n">static_url_path</span><span class="o">=</span><span class="kc">None</span><span class="p">,</span> <span class="n">template_folder</span><span class="o">=</span><span class="kc">None</span><span class="p">,</span>
    139. 

  139.                  <span class="n">url_prefix</span><span class="o">=</span><span class="kc">None</span><span class="p">,</span> <span class="n">subdomain</span><span class="o">=</span><span class="kc">None</span><span class="p">,</span> <span class="n">url_defaults</span><span class="o">=</span><span class="kc">None</span><span class="p">,</span>
    140. 

  140.                  <span class="n">root_path</span><span class="o">=</span><span class="kc">None</span><span class="p">):</span>
    141. 

  141.         <span class="n">_PackageBoundObject</span><span class="o">.</span><span class="n">__init__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">import_name</span><span class="p">,</span> <span class="n">template_folder</span><span class="p">,</span>
    142. 

  142.                                      <span class="n">root_path</span><span class="o">=</span><span class="n">root_path</span><span class="p">)</span>
    143. 

  143.         <span class="bp">self</span><span class="o">.</span><span class="n">name</span> <span class="o">=</span> <span class="n">name</span>
    144. 

  144.         <span class="bp">self</span><span class="o">.</span><span class="n">url_prefix</span> <span class="o">=</span> <span class="n">url_prefix</span>
    145. 

  145.         <span class="bp">self</span><span class="o">.</span><span class="n">subdomain</span> <span class="o">=</span> <span class="n">subdomain</span>
    146. 

  146.         <span class="bp">self</span><span class="o">.</span><span class="n">static_folder</span> <span class="o">=</span> <span class="n">static_folder</span>
    147. 

  147.         <span class="bp">self</span><span class="o">.</span><span class="n">static_url_path</span> <span class="o">=</span> <span class="n">static_url_path</span>
    148. 

  148.         <span class="bp">self</span><span class="o">.</span><span class="n">deferred_functions</span> <span class="o">=</span> <span class="p">[]</span>
    149. 

  149.         <span class="k">if</span> <span class="n">url_defaults</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span>
    150. 

  150.             <span class="n">url_defaults</span> <span class="o">=</span> <span class="p">{}</span>
    151. 

  151.         <span class="bp">self</span><span class="o">.</span><span class="n">url_values_defaults</span> <span class="o">=</span> <span class="n">url_defaults</span>
    152. 

  152. 

  153. <div class="viewcode-block" id="Blueprint.record"><a class="viewcode-back" href="../../flask/flask.html#flask.blueprints.Blueprint.record">[docs]</a>    <span class="k">def</span> <span class="nf">record</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">func</span><span class="p">):</span>
    154. 

  154.         <span class="sd">&quot;&quot;&quot;Registers a function that is called when the blueprint is</span>
    155. 

  155. <span class="sd">        registered on the application.  This function is called with the</span>
    156. 

  156. <span class="sd">        state as argument as returned by the :meth:`make_setup_state`</span>
    157. 

  157. <span class="sd">        method.</span>
    158. 

  158. <span class="sd">        &quot;&quot;&quot;</span>
    159. 

  159.         <span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">_got_registered_once</span> <span class="ow">and</span> <span class="bp">self</span><span class="o">.</span><span class="n">warn_on_modifications</span><span class="p">:</span>
    160. 

  160.             <span class="kn">from</span> <span class="nn">warnings</span> <span class="k">import</span> <span class="n">warn</span>
    161. 

  161.             <span class="n">warn</span><span class="p">(</span><span class="ne">Warning</span><span class="p">(</span><span class="s1">&#39;The blueprint was already registered once &#39;</span>
    162. 

  162.                          <span class="s1">&#39;but is getting modified now.  These changes &#39;</span>
    163. 

  163.                          <span class="s1">&#39;will not show up.&#39;</span><span class="p">))</span>
    164. 

  164.         <span class="bp">self</span><span class="o">.</span><span class="n">deferred_functions</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">func</span><span class="p">)</span></div>
    165. 

  165. 

  166. <div class="viewcode-block" id="Blueprint.record_once"><a class="viewcode-back" href="../../flask/flask.html#flask.blueprints.Blueprint.record_once">[docs]</a>    <span class="k">def</span> <span class="nf">record_once</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">func</span><span class="p">):</span>
    167. 

  167.         <span class="sd">&quot;&quot;&quot;Works like :meth:`record` but wraps the function in another</span>
    168. 

  168. <span class="sd">        function that will ensure the function is only called once.  If the</span>
    169. 

  169. <span class="sd">        blueprint is registered a second time on the application, the</span>
    170. 

  170. <span class="sd">        function passed is not called.</span>
    171. 

  171. <span class="sd">        &quot;&quot;&quot;</span>
    172. 

  172.         <span class="k">def</span> <span class="nf">wrapper</span><span class="p">(</span><span class="n">state</span><span class="p">):</span>
    173. 

  173.             <span class="k">if</span> <span class="n">state</span><span class="o">.</span><span class="n">first_registration</span><span class="p">:</span>
    174. 

  174.                 <span class="n">func</span><span class="p">(</span><span class="n">state</span><span class="p">)</span>
    175. 

  175.         <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">record</span><span class="p">(</span><span class="n">update_wrapper</span><span class="p">(</span><span class="n">wrapper</span><span class="p">,</span> <span class="n">func</span><span class="p">))</span></div>
    176. 

  176. 

  177. <div class="viewcode-block" id="Blueprint.make_setup_state"><a class="viewcode-back" href="../../flask/flask.html#flask.blueprints.Blueprint.make_setup_state">[docs]</a>    <span class="k">def</span> <span class="nf">make_setup_state</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">app</span><span class="p">,</span> <span class="n">options</span><span class="p">,</span> <span class="n">first_registration</span><span class="o">=</span><span class="kc">False</span><span class="p">):</span>
    178. 

  178.         <span class="sd">&quot;&quot;&quot;Creates an instance of :meth:`~flask.blueprints.BlueprintSetupState`</span>
    179. 

  179. <span class="sd">        object that is later passed to the register callback functions.</span>
    180. 

  180. <span class="sd">        Subclasses can override this to return a subclass of the setup state.</span>
    181. 

  181. <span class="sd">        &quot;&quot;&quot;</span>
    182. 

  182.         <span class="k">return</span> <span class="n">BlueprintSetupState</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">app</span><span class="p">,</span> <span class="n">options</span><span class="p">,</span> <span class="n">first_registration</span><span class="p">)</span></div>
    183. 

  183. 

  184. <div class="viewcode-block" id="Blueprint.register"><a class="viewcode-back" href="../../flask/flask.html#flask.blueprints.Blueprint.register">[docs]</a>    <span class="k">def</span> <span class="nf">register</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">app</span><span class="p">,</span> <span class="n">options</span><span class="p">,</span> <span class="n">first_registration</span><span class="o">=</span><span class="kc">False</span><span class="p">):</span>
    185. 

  185.         <span class="sd">&quot;&quot;&quot;Called by :meth:`Flask.register_blueprint` to register a blueprint</span>
    186. 

  186. <span class="sd">        on the application.  This can be overridden to customize the register</span>
    187. 

  187. <span class="sd">        behavior.  Keyword arguments from</span>
    188. 

  188. <span class="sd">        :func:`~flask.Flask.register_blueprint` are directly forwarded to this</span>
    189. 

  189. <span class="sd">        method in the `options` dictionary.</span>
    190. 

  190. <span class="sd">        &quot;&quot;&quot;</span>
    191. 

  191.         <span class="bp">self</span><span class="o">.</span><span class="n">_got_registered_once</span> <span class="o">=</span> <span class="kc">True</span>
    192. 

  192.         <span class="n">state</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">make_setup_state</span><span class="p">(</span><span class="n">app</span><span class="p">,</span> <span class="n">options</span><span class="p">,</span> <span class="n">first_registration</span><span class="p">)</span>
    193. 

  193.         <span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">has_static_folder</span><span class="p">:</span>
    194. 

  194.             <span class="n">state</span><span class="o">.</span><span class="n">add_url_rule</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">static_url_path</span> <span class="o">+</span> <span class="s1">&#39;/&lt;path:filename&gt;&#39;</span><span class="p">,</span>
    195. 

  195.                                <span class="n">view_func</span><span class="o">=</span><span class="bp">self</span><span class="o">.</span><span class="n">send_static_file</span><span class="p">,</span>
    196. 

  196.                                <span class="n">endpoint</span><span class="o">=</span><span class="s1">&#39;static&#39;</span><span class="p">)</span>
    197. 

  197. 

  198.         <span class="k">for</span> <span class="n">deferred</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">deferred_functions</span><span class="p">:</span>
    199. 

  199.             <span class="n">deferred</span><span class="p">(</span><span class="n">state</span><span class="p">)</span></div>
    200. 

  200. 

  201. <div class="viewcode-block" id="Blueprint.route"><a class="viewcode-back" href="../../flask/flask.html#flask.blueprints.Blueprint.route">[docs]</a>    <span class="k">def</span> <span class="nf">route</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">rule</span><span class="p">,</span> <span class="o">**</span><span class="n">options</span><span class="p">):</span>
    202. 

  202.         <span class="sd">&quot;&quot;&quot;Like :meth:`Flask.route` but for a blueprint.  The endpoint for the</span>
    203. 

  203. <span class="sd">        :func:`url_for` function is prefixed with the name of the blueprint.</span>
    204. 

  204. <span class="sd">        &quot;&quot;&quot;</span>
    205. 

  205.         <span class="k">def</span> <span class="nf">decorator</span><span class="p">(</span><span class="n">f</span><span class="p">):</span>
    206. 

  206.             <span class="n">endpoint</span> <span class="o">=</span> <span class="n">options</span><span class="o">.</span><span class="n">pop</span><span class="p">(</span><span class="s2">&quot;endpoint&quot;</span><span class="p">,</span> <span class="n">f</span><span class="o">.</span><span class="n">__name__</span><span class="p">)</span>
    207. 

  207.             <span class="bp">self</span><span class="o">.</span><span class="n">add_url_rule</span><span class="p">(</span><span class="n">rule</span><span class="p">,</span> <span class="n">endpoint</span><span class="p">,</span> <span class="n">f</span><span class="p">,</span> <span class="o">**</span><span class="n">options</span><span class="p">)</span>
    208. 

  208.             <span class="k">return</span> <span class="n">f</span>
    209. 

  209.         <span class="k">return</span> <span class="n">decorator</span></div>
    210. 

  210. 

  211. <div class="viewcode-block" id="Blueprint.add_url_rule"><a class="viewcode-back" href="../../flask/flask.html#flask.blueprints.Blueprint.add_url_rule">[docs]</a>    <span class="k">def</span> <span class="nf">add_url_rule</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">rule</span><span class="p">,</span> <span class="n">endpoint</span><span class="o">=</span><span class="kc">None</span><span class="p">,</span> <span class="n">view_func</span><span class="o">=</span><span class="kc">None</span><span class="p">,</span> <span class="o">**</span><span class="n">options</span><span class="p">):</span>
    212. 

  212.         <span class="sd">&quot;&quot;&quot;Like :meth:`Flask.add_url_rule` but for a blueprint.  The endpoint for</span>
    213. 

  213. <span class="sd">        the :func:`url_for` function is prefixed with the name of the blueprint.</span>
    214. 

  214. <span class="sd">        &quot;&quot;&quot;</span>
    215. 

  215.         <span class="k">if</span> <span class="n">endpoint</span><span class="p">:</span>
    216. 

  216.             <span class="k">assert</span> <span class="s1">&#39;.&#39;</span> <span class="ow">not</span> <span class="ow">in</span> <span class="n">endpoint</span><span class="p">,</span> <span class="s2">&quot;Blueprint endpoints should not contain dots&quot;</span>
    217. 

  217.         <span class="bp">self</span><span class="o">.</span><span class="n">record</span><span class="p">(</span><span class="k">lambda</span> <span class="n">s</span><span class="p">:</span>
    218. 

  218.             <span class="n">s</span><span class="o">.</span><span class="n">add_url_rule</span><span class="p">(</span><span class="n">rule</span><span class="p">,</span> <span class="n">endpoint</span><span class="p">,</span> <span class="n">view_func</span><span class="p">,</span> <span class="o">**</span><span class="n">options</span><span class="p">))</span></div>
    219. 

  219. 

  220. <div class="viewcode-block" id="Blueprint.endpoint"><a class="viewcode-back" href="../../flask/flask.html#flask.blueprints.Blueprint.endpoint">[docs]</a>    <span class="k">def</span> <span class="nf">endpoint</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">endpoint</span><span class="p">):</span>
    221. 

  221.         <span class="sd">&quot;&quot;&quot;Like :meth:`Flask.endpoint` but for a blueprint.  This does not</span>
    222. 

  222. <span class="sd">        prefix the endpoint with the blueprint name, this has to be done</span>
    223. 

  223. <span class="sd">        explicitly by the user of this method.  If the endpoint is prefixed</span>
    224. 

  224. <span class="sd">        with a `.` it will be registered to the current blueprint, otherwise</span>
    225. 

  225. <span class="sd">        it&#39;s an application independent endpoint.</span>
    226. 

  226. <span class="sd">        &quot;&quot;&quot;</span>
    227. 

  227.         <span class="k">def</span> <span class="nf">decorator</span><span class="p">(</span><span class="n">f</span><span class="p">):</span>
    228. 

  228.             <span class="k">def</span> <span class="nf">register_endpoint</span><span class="p">(</span><span class="n">state</span><span class="p">):</span>
    229. 

  229.                 <span class="n">state</span><span class="o">.</span><span class="n">app</span><span class="o">.</span><span class="n">view_functions</span><span class="p">[</span><span class="n">endpoint</span><span class="p">]</span> <span class="o">=</span> <span class="n">f</span>
    230. 

  230.             <span class="bp">self</span><span class="o">.</span><span class="n">record_once</span><span class="p">(</span><span class="n">register_endpoint</span><span class="p">)</span>
    231. 

  231.             <span class="k">return</span> <span class="n">f</span>
    232. 

  232.         <span class="k">return</span> <span class="n">decorator</span></div>
    233. 

  233. 

  234. <div class="viewcode-block" id="Blueprint.app_template_filter"><a class="viewcode-back" href="../../flask/flask.html#flask.blueprints.Blueprint.app_template_filter">[docs]</a>    <span class="k">def</span> <span class="nf">app_template_filter</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">name</span><span class="o">=</span><span class="kc">None</span><span class="p">):</span>
    235. 

  235.         <span class="sd">&quot;&quot;&quot;Register a custom template filter, available application wide.  Like</span>
    236. 

  236. <span class="sd">        :meth:`Flask.template_filter` but for a blueprint.</span>
    237. 

  237. 

  238. <span class="sd">        :param name: the optional name of the filter, otherwise the</span>
    239. 

  239. <span class="sd">                     function name will be used.</span>
    240. 

  240. <span class="sd">        &quot;&quot;&quot;</span>
    241. 

  241.         <span class="k">def</span> <span class="nf">decorator</span><span class="p">(</span><span class="n">f</span><span class="p">):</span>
    242. 

  242.             <span class="bp">self</span><span class="o">.</span><span class="n">add_app_template_filter</span><span class="p">(</span><span class="n">f</span><span class="p">,</span> <span class="n">name</span><span class="o">=</span><span class="n">name</span><span class="p">)</span>
    243. 

  243.             <span class="k">return</span> <span class="n">f</span>
    244. 

  244.         <span class="k">return</span> <span class="n">decorator</span></div>
    245. 

  245. 

  246. <div class="viewcode-block" id="Blueprint.add_app_template_filter"><a class="viewcode-back" href="../../flask/flask.html#flask.blueprints.Blueprint.add_app_template_filter">[docs]</a>    <span class="k">def</span> <span class="nf">add_app_template_filter</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">f</span><span class="p">,</span> <span class="n">name</span><span class="o">=</span><span class="kc">None</span><span class="p">):</span>
    247. 

  247.         <span class="sd">&quot;&quot;&quot;Register a custom template filter, available application wide.  Like</span>
    248. 

  248. <span class="sd">        :meth:`Flask.add_template_filter` but for a blueprint.  Works exactly</span>
    249. 

  249. <span class="sd">        like the :meth:`app_template_filter` decorator.</span>
    250. 

  250. 

  251. <span class="sd">        :param name: the optional name of the filter, otherwise the</span>
    252. 

  252. <span class="sd">                     function name will be used.</span>
    253. 

  253. <span class="sd">        &quot;&quot;&quot;</span>
    254. 

  254.         <span class="k">def</span> <span class="nf">register_template</span><span class="p">(</span><span class="n">state</span><span class="p">):</span>
    255. 

  255.             <span class="n">state</span><span class="o">.</span><span class="n">app</span><span class="o">.</span><span class="n">jinja_env</span><span class="o">.</span><span class="n">filters</span><span class="p">[</span><span class="n">name</span> <span class="ow">or</span> <span class="n">f</span><span class="o">.</span><span class="n">__name__</span><span class="p">]</span> <span class="o">=</span> <span class="n">f</span>
    256. 

  256.         <span class="bp">self</span><span class="o">.</span><span class="n">record_once</span><span class="p">(</span><span class="n">register_template</span><span class="p">)</span></div>
    257. 

  257. 

  258. <div class="viewcode-block" id="Blueprint.app_template_test"><a class="viewcode-back" href="../../flask/flask.html#flask.blueprints.Blueprint.app_template_test">[docs]</a>    <span class="k">def</span> <span class="nf">app_template_test</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">name</span><span class="o">=</span><span class="kc">None</span><span class="p">):</span>
    259. 

  259.         <span class="sd">&quot;&quot;&quot;Register a custom template test, available application wide.  Like</span>
    260. 

  260. <span class="sd">        :meth:`Flask.template_test` but for a blueprint.</span>
    261. 

  261. 

  262. <span class="sd">        .. versionadded:: 0.10</span>
    263. 

  263. 

  264. <span class="sd">        :param name: the optional name of the test, otherwise the</span>
    265. 

  265. <span class="sd">                     function name will be used.</span>
    266. 

  266. <span class="sd">        &quot;&quot;&quot;</span>
    267. 

  267.         <span class="k">def</span> <span class="nf">decorator</span><span class="p">(</span><span class="n">f</span><span class="p">):</span>
    268. 

  268.             <span class="bp">self</span><span class="o">.</span><span class="n">add_app_template_test</span><span class="p">(</span><span class="n">f</span><span class="p">,</span> <span class="n">name</span><span class="o">=</span><span class="n">name</span><span class="p">)</span>
    269. 

  269.             <span class="k">return</span> <span class="n">f</span>
    270. 

  270.         <span class="k">return</span> <span class="n">decorator</span></div>
    271. 

  271. 

  272. <div class="viewcode-block" id="Blueprint.add_app_template_test"><a class="viewcode-back" href="../../flask/flask.html#flask.blueprints.Blueprint.add_app_template_test">[docs]</a>    <span class="k">def</span> <span class="nf">add_app_template_test</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">f</span><span class="p">,</span> <span class="n">name</span><span class="o">=</span><span class="kc">None</span><span class="p">):</span>
    273. 

  273.         <span class="sd">&quot;&quot;&quot;Register a custom template test, available application wide.  Like</span>
    274. 

  274. <span class="sd">        :meth:`Flask.add_template_test` but for a blueprint.  Works exactly</span>
    275. 

  275. <span class="sd">        like the :meth:`app_template_test` decorator.</span>
    276. 

  276. 

  277. <span class="sd">        .. versionadded:: 0.10</span>
    278. 

  278. 

  279. <span class="sd">        :param name: the optional name of the test, otherwise the</span>
    280. 

  280. <span class="sd">                     function name will be used.</span>
    281. 

  281. <span class="sd">        &quot;&quot;&quot;</span>
    282. 

  282.         <span class="k">def</span> <span class="nf">register_template</span><span class="p">(</span><span class="n">state</span><span class="p">):</span>
    283. 

  283.             <span class="n">state</span><span class="o">.</span><span class="n">app</span><span class="o">.</span><span class="n">jinja_env</span><span class="o">.</span><span class="n">tests</span><span class="p">[</span><span class="n">name</span> <span class="ow">or</span> <span class="n">f</span><span class="o">.</span><span class="n">__name__</span><span class="p">]</span> <span class="o">=</span> <span class="n">f</span>
    284. 

  284.         <span class="bp">self</span><span class="o">.</span><span class="n">record_once</span><span class="p">(</span><span class="n">register_template</span><span class="p">)</span></div>
    285. 

  285. 

  286. <div class="viewcode-block" id="Blueprint.app_template_global"><a class="viewcode-back" href="../../flask/flask.html#flask.blueprints.Blueprint.app_template_global">[docs]</a>    <span class="k">def</span> <span class="nf">app_template_global</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">name</span><span class="o">=</span><span class="kc">None</span><span class="p">):</span>
    287. 

  287.         <span class="sd">&quot;&quot;&quot;Register a custom template global, available application wide.  Like</span>
    288. 

  288. <span class="sd">        :meth:`Flask.template_global` but for a blueprint.</span>
    289. 

  289. 

  290. <span class="sd">        .. versionadded:: 0.10</span>
    291. 

  291. 

  292. <span class="sd">        :param name: the optional name of the global, otherwise the</span>
    293. 

  293. <span class="sd">                     function name will be used.</span>
    294. 

  294. <span class="sd">        &quot;&quot;&quot;</span>
    295. 

  295.         <span class="k">def</span> <span class="nf">decorator</span><span class="p">(</span><span class="n">f</span><span class="p">):</span>
    296. 

  296.             <span class="bp">self</span><span class="o">.</span><span class="n">add_app_template_global</span><span class="p">(</span><span class="n">f</span><span class="p">,</span> <span class="n">name</span><span class="o">=</span><span class="n">name</span><span class="p">)</span>
    297. 

  297.             <span class="k">return</span> <span class="n">f</span>
    298. 

  298.         <span class="k">return</span> <span class="n">decorator</span></div>
    299. 

  299. 

  300. <div class="viewcode-block" id="Blueprint.add_app_template_global"><a class="viewcode-back" href="../../flask/flask.html#flask.blueprints.Blueprint.add_app_template_global">[docs]</a>    <span class="k">def</span> <span class="nf">add_app_template_global</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">f</span><span class="p">,</span> <span class="n">name</span><span class="o">=</span><span class="kc">None</span><span class="p">):</span>
    301. 

  301.         <span class="sd">&quot;&quot;&quot;Register a custom template global, available application wide.  Like</span>
    302. 

  302. <span class="sd">        :meth:`Flask.add_template_global` but for a blueprint.  Works exactly</span>
    303. 

  303. <span class="sd">        like the :meth:`app_template_global` decorator.</span>
    304. 

  304. 

  305. <span class="sd">        .. versionadded:: 0.10</span>
    306. 

  306. 

  307. <span class="sd">        :param name: the optional name of the global, otherwise the</span>
    308. 

  308. <span class="sd">                     function name will be used.</span>
    309. 

  309. <span class="sd">        &quot;&quot;&quot;</span>
    310. 

  310.         <span class="k">def</span> <span class="nf">register_template</span><span class="p">(</span><span class="n">state</span><span class="p">):</span>
    311. 

  311.             <span class="n">state</span><span class="o">.</span><span class="n">app</span><span class="o">.</span><span class="n">jinja_env</span><span class="o">.</span><span class="n">globals</span><span class="p">[</span><span class="n">name</span> <span class="ow">or</span> <span class="n">f</span><span class="o">.</span><span class="n">__name__</span><span class="p">]</span> <span class="o">=</span> <span class="n">f</span>
    312. 

  312.         <span class="bp">self</span><span class="o">.</span><span class="n">record_once</span><span class="p">(</span><span class="n">register_template</span><span class="p">)</span></div>
    313. 

  313. 

  314. <div class="viewcode-block" id="Blueprint.before_request"><a class="viewcode-back" href="../../flask/flask.html#flask.blueprints.Blueprint.before_request">[docs]</a>    <span class="k">def</span> <span class="nf">before_request</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">f</span><span class="p">):</span>
    315. 

  315.         <span class="sd">&quot;&quot;&quot;Like :meth:`Flask.before_request` but for a blueprint.  This function</span>
    316. 

  316. <span class="sd">        is only executed before each request that is handled by a function of</span>
    317. 

  317. <span class="sd">        that blueprint.</span>
    318. 

  318. <span class="sd">        &quot;&quot;&quot;</span>
    319. 

  319.         <span class="bp">self</span><span class="o">.</span><span class="n">record_once</span><span class="p">(</span><span class="k">lambda</span> <span class="n">s</span><span class="p">:</span> <span class="n">s</span><span class="o">.</span><span class="n">app</span><span class="o">.</span><span class="n">before_request_funcs</span>
    320. 

  320.             <span class="o">.</span><span class="n">setdefault</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">name</span><span class="p">,</span> <span class="p">[])</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">f</span><span class="p">))</span>
    321. 

  321.         <span class="k">return</span> <span class="n">f</span></div>
    322. 

  322. 

  323. <div class="viewcode-block" id="Blueprint.before_app_request"><a class="viewcode-back" href="../../flask/flask.html#flask.blueprints.Blueprint.before_app_request">[docs]</a>    <span class="k">def</span> <span class="nf">before_app_request</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">f</span><span class="p">):</span>
    324. 

  324.         <span class="sd">&quot;&quot;&quot;Like :meth:`Flask.before_request`.  Such a function is executed</span>
    325. 

  325. <span class="sd">        before each request, even if outside of a blueprint.</span>
    326. 

  326. <span class="sd">        &quot;&quot;&quot;</span>
    327. 

  327.         <span class="bp">self</span><span class="o">.</span><span class="n">record_once</span><span class="p">(</span><span class="k">lambda</span> <span class="n">s</span><span class="p">:</span> <span class="n">s</span><span class="o">.</span><span class="n">app</span><span class="o">.</span><span class="n">before_request_funcs</span>
    328. 

  328.             <span class="o">.</span><span class="n">setdefault</span><span class="p">(</span><span class="kc">None</span><span class="p">,</span> <span class="p">[])</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">f</span><span class="p">))</span>
    329. 

  329.         <span class="k">return</span> <span class="n">f</span></div>
    330. 

  330. 

  331. <div class="viewcode-block" id="Blueprint.before_app_first_request"><a class="viewcode-back" href="../../flask/flask.html#flask.blueprints.Blueprint.before_app_first_request">[docs]</a>    <span class="k">def</span> <span class="nf">before_app_first_request</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">f</span><span class="p">):</span>
    332. 

  332.         <span class="sd">&quot;&quot;&quot;Like :meth:`Flask.before_first_request`.  Such a function is</span>
    333. 

  333. <span class="sd">        executed before the first request to the application.</span>
    334. 

  334. <span class="sd">        &quot;&quot;&quot;</span>
    335. 

  335.         <span class="bp">self</span><span class="o">.</span><span class="n">record_once</span><span class="p">(</span><span class="k">lambda</span> <span class="n">s</span><span class="p">:</span> <span class="n">s</span><span class="o">.</span><span class="n">app</span><span class="o">.</span><span class="n">before_first_request_funcs</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">f</span><span class="p">))</span>
    336. 

  336.         <span class="k">return</span> <span class="n">f</span></div>
    337. 

  337. 

  338. <div class="viewcode-block" id="Blueprint.after_request"><a class="viewcode-back" href="../../flask/flask.html#flask.blueprints.Blueprint.after_request">[docs]</a>    <span class="k">def</span> <span class="nf">after_request</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">f</span><span class="p">):</span>
    339. 

  339.         <span class="sd">&quot;&quot;&quot;Like :meth:`Flask.after_request` but for a blueprint.  This function</span>
    340. 

  340. <span class="sd">        is only executed after each request that is handled by a function of</span>
    341. 

  341. <span class="sd">        that blueprint.</span>
    342. 

  342. <span class="sd">        &quot;&quot;&quot;</span>
    343. 

  343.         <span class="bp">self</span><span class="o">.</span><span class="n">record_once</span><span class="p">(</span><span class="k">lambda</span> <span class="n">s</span><span class="p">:</span> <span class="n">s</span><span class="o">.</span><span class="n">app</span><span class="o">.</span><span class="n">after_request_funcs</span>
    344. 

  344.             <span class="o">.</span><span class="n">setdefault</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">name</span><span class="p">,</span> <span class="p">[])</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">f</span><span class="p">))</span>
    345. 

  345.         <span class="k">return</span> <span class="n">f</span></div>
    346. 

  346. 

  347. <div class="viewcode-block" id="Blueprint.after_app_request"><a class="viewcode-back" href="../../flask/flask.html#flask.blueprints.Blueprint.after_app_request">[docs]</a>    <span class="k">def</span> <span class="nf">after_app_request</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">f</span><span class="p">):</span>
    348. 

  348.         <span class="sd">&quot;&quot;&quot;Like :meth:`Flask.after_request` but for a blueprint.  Such a function</span>
    349. 

  349. <span class="sd">        is executed after each request, even if outside of the blueprint.</span>
    350. 

  350. <span class="sd">        &quot;&quot;&quot;</span>
    351. 

  351.         <span class="bp">self</span><span class="o">.</span><span class="n">record_once</span><span class="p">(</span><span class="k">lambda</span> <span class="n">s</span><span class="p">:</span> <span class="n">s</span><span class="o">.</span><span class="n">app</span><span class="o">.</span><span class="n">after_request_funcs</span>
    352. 

  352.             <span class="o">.</span><span class="n">setdefault</span><span class="p">(</span><span class="kc">None</span><span class="p">,</span> <span class="p">[])</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">f</span><span class="p">))</span>
    353. 

  353.         <span class="k">return</span> <span class="n">f</span></div>
    354. 

  354. 

  355. <div class="viewcode-block" id="Blueprint.teardown_request"><a class="viewcode-back" href="../../flask/flask.html#flask.blueprints.Blueprint.teardown_request">[docs]</a>    <span class="k">def</span> <span class="nf">teardown_request</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">f</span><span class="p">):</span>
    356. 

  356.         <span class="sd">&quot;&quot;&quot;Like :meth:`Flask.teardown_request` but for a blueprint.  This</span>
    357. 

  357. <span class="sd">        function is only executed when tearing down requests handled by a</span>
    358. 

  358. <span class="sd">        function of that blueprint.  Teardown request functions are executed</span>
    359. 

  359. <span class="sd">        when the request context is popped, even when no actual request was</span>
    360. 

  360. <span class="sd">        performed.</span>
    361. 

  361. <span class="sd">        &quot;&quot;&quot;</span>
    362. 

  362.         <span class="bp">self</span><span class="o">.</span><span class="n">record_once</span><span class="p">(</span><span class="k">lambda</span> <span class="n">s</span><span class="p">:</span> <span class="n">s</span><span class="o">.</span><span class="n">app</span><span class="o">.</span><span class="n">teardown_request_funcs</span>
    363. 

  363.             <span class="o">.</span><span class="n">setdefault</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">name</span><span class="p">,</span> <span class="p">[])</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">f</span><span class="p">))</span>
    364. 

  364.         <span class="k">return</span> <span class="n">f</span></div>
    365. 

  365. 

  366. <div class="viewcode-block" id="Blueprint.teardown_app_request"><a class="viewcode-back" href="../../flask/flask.html#flask.blueprints.Blueprint.teardown_app_request">[docs]</a>    <span class="k">def</span> <span class="nf">teardown_app_request</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">f</span><span class="p">):</span>
    367. 

  367.         <span class="sd">&quot;&quot;&quot;Like :meth:`Flask.teardown_request` but for a blueprint.  Such a</span>
    368. 

  368. <span class="sd">        function is executed when tearing down each request, even if outside of</span>
    369. 

  369. <span class="sd">        the blueprint.</span>
    370. 

  370. <span class="sd">        &quot;&quot;&quot;</span>
    371. 

  371.         <span class="bp">self</span><span class="o">.</span><span class="n">record_once</span><span class="p">(</span><span class="k">lambda</span> <span class="n">s</span><span class="p">:</span> <span class="n">s</span><span class="o">.</span><span class="n">app</span><span class="o">.</span><span class="n">teardown_request_funcs</span>
    372. 

  372.             <span class="o">.</span><span class="n">setdefault</span><span class="p">(</span><span class="kc">None</span><span class="p">,</span> <span class="p">[])</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">f</span><span class="p">))</span>
    373. 

  373.         <span class="k">return</span> <span class="n">f</span></div>
    374. 

  374. 

  375. <div class="viewcode-block" id="Blueprint.context_processor"><a class="viewcode-back" href="../../flask/flask.html#flask.blueprints.Blueprint.context_processor">[docs]</a>    <span class="k">def</span> <span class="nf">context_processor</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">f</span><span class="p">):</span>
    376. 

  376.         <span class="sd">&quot;&quot;&quot;Like :meth:`Flask.context_processor` but for a blueprint.  This</span>
    377. 

  377. <span class="sd">        function is only executed for requests handled by a blueprint.</span>
    378. 

  378. <span class="sd">        &quot;&quot;&quot;</span>
    379. 

  379.         <span class="bp">self</span><span class="o">.</span><span class="n">record_once</span><span class="p">(</span><span class="k">lambda</span> <span class="n">s</span><span class="p">:</span> <span class="n">s</span><span class="o">.</span><span class="n">app</span><span class="o">.</span><span class="n">template_context_processors</span>
    380. 

  380.             <span class="o">.</span><span class="n">setdefault</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">name</span><span class="p">,</span> <span class="p">[])</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">f</span><span class="p">))</span>
    381. 

  381.         <span class="k">return</span> <span class="n">f</span></div>
    382. 

  382. 

  383. <div class="viewcode-block" id="Blueprint.app_context_processor"><a class="viewcode-back" href="../../flask/flask.html#flask.blueprints.Blueprint.app_context_processor">[docs]</a>    <span class="k">def</span> <span class="nf">app_context_processor</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">f</span><span class="p">):</span>
    384. 

  384.         <span class="sd">&quot;&quot;&quot;Like :meth:`Flask.context_processor` but for a blueprint.  Such a</span>
    385. 

  385. <span class="sd">        function is executed each request, even if outside of the blueprint.</span>
    386. 

  386. <span class="sd">        &quot;&quot;&quot;</span>
    387. 

  387.         <span class="bp">self</span><span class="o">.</span><span class="n">record_once</span><span class="p">(</span><span class="k">lambda</span> <span class="n">s</span><span class="p">:</span> <span class="n">s</span><span class="o">.</span><span class="n">app</span><span class="o">.</span><span class="n">template_context_processors</span>
    388. 

  388.             <span class="o">.</span><span class="n">setdefault</span><span class="p">(</span><span class="kc">None</span><span class="p">,</span> <span class="p">[])</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">f</span><span class="p">))</span>
    389. 

  389.         <span class="k">return</span> <span class="n">f</span></div>
    390. 

  390. 

  391. <div class="viewcode-block" id="Blueprint.app_errorhandler"><a class="viewcode-back" href="../../flask/flask.html#flask.blueprints.Blueprint.app_errorhandler">[docs]</a>    <span class="k">def</span> <span class="nf">app_errorhandler</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">code</span><span class="p">):</span>
    392. 

  392.         <span class="sd">&quot;&quot;&quot;Like :meth:`Flask.errorhandler` but for a blueprint.  This</span>
    393. 

  393. <span class="sd">        handler is used for all requests, even if outside of the blueprint.</span>
    394. 

  394. <span class="sd">        &quot;&quot;&quot;</span>
    395. 

  395.         <span class="k">def</span> <span class="nf">decorator</span><span class="p">(</span><span class="n">f</span><span class="p">):</span>
    396. 

  396.             <span class="bp">self</span><span class="o">.</span><span class="n">record_once</span><span class="p">(</span><span class="k">lambda</span> <span class="n">s</span><span class="p">:</span> <span class="n">s</span><span class="o">.</span><span class="n">app</span><span class="o">.</span><span class="n">errorhandler</span><span class="p">(</span><span class="n">code</span><span class="p">)(</span><span class="n">f</span><span class="p">))</span>
    397. 

  397.             <span class="k">return</span> <span class="n">f</span>
    398. 

  398.         <span class="k">return</span> <span class="n">decorator</span></div>
    399. 

  399. 

  400. <div class="viewcode-block" id="Blueprint.url_value_preprocessor"><a class="viewcode-back" href="../../flask/flask.html#flask.blueprints.Blueprint.url_value_preprocessor">[docs]</a>    <span class="k">def</span> <span class="nf">url_value_preprocessor</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">f</span><span class="p">):</span>
    401. 

  401.         <span class="sd">&quot;&quot;&quot;Registers a function as URL value preprocessor for this</span>
    402. 

  402. <span class="sd">        blueprint.  It&#39;s called before the view functions are called and</span>
    403. 

  403. <span class="sd">        can modify the url values provided.</span>
    404. 

  404. <span class="sd">        &quot;&quot;&quot;</span>
    405. 

  405.         <span class="bp">self</span><span class="o">.</span><span class="n">record_once</span><span class="p">(</span><span class="k">lambda</span> <span class="n">s</span><span class="p">:</span> <span class="n">s</span><span class="o">.</span><span class="n">app</span><span class="o">.</span><span class="n">url_value_preprocessors</span>
    406. 

  406.             <span class="o">.</span><span class="n">setdefault</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">name</span><span class="p">,</span> <span class="p">[])</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">f</span><span class="p">))</span>
    407. 

  407.         <span class="k">return</span> <span class="n">f</span></div>
    408. 

  408. 

  409. <div class="viewcode-block" id="Blueprint.url_defaults"><a class="viewcode-back" href="../../flask/flask.html#flask.blueprints.Blueprint.url_defaults">[docs]</a>    <span class="k">def</span> <span class="nf">url_defaults</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">f</span><span class="p">):</span>
    410. 

  410.         <span class="sd">&quot;&quot;&quot;Callback function for URL defaults for this blueprint.  It&#39;s called</span>
    411. 

  411. <span class="sd">        with the endpoint and values and should update the values passed</span>
    412. 

  412. <span class="sd">        in place.</span>
    413. 

  413. <span class="sd">        &quot;&quot;&quot;</span>
    414. 

  414.         <span class="bp">self</span><span class="o">.</span><span class="n">record_once</span><span class="p">(</span><span class="k">lambda</span> <span class="n">s</span><span class="p">:</span> <span class="n">s</span><span class="o">.</span><span class="n">app</span><span class="o">.</span><span class="n">url_default_functions</span>
    415. 

  415.             <span class="o">.</span><span class="n">setdefault</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">name</span><span class="p">,</span> <span class="p">[])</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">f</span><span class="p">))</span>
    416. 

  416.         <span class="k">return</span> <span class="n">f</span></div>
    417. 

  417. 

  418. <div class="viewcode-block" id="Blueprint.app_url_value_preprocessor"><a class="viewcode-back" href="../../flask/flask.html#flask.blueprints.Blueprint.app_url_value_preprocessor">[docs]</a>    <span class="k">def</span> <span class="nf">app_url_value_preprocessor</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">f</span><span class="p">):</span>
    419. 

  419.         <span class="sd">&quot;&quot;&quot;Same as :meth:`url_value_preprocessor` but application wide.</span>
    420. 

  420. <span class="sd">        &quot;&quot;&quot;</span>
    421. 

  421.         <span class="bp">self</span><span class="o">.</span><span class="n">record_once</span><span class="p">(</span><span class="k">lambda</span> <span class="n">s</span><span class="p">:</span> <span class="n">s</span><span class="o">.</span><span class="n">app</span><span class="o">.</span><span class="n">url_value_preprocessors</span>
    422. 

  422.             <span class="o">.</span><span class="n">setdefault</span><span class="p">(</span><span class="kc">None</span><span class="p">,</span> <span class="p">[])</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">f</span><span class="p">))</span>
    423. 

  423.         <span class="k">return</span> <span class="n">f</span></div>
    424. 

  424. 

  425. <div class="viewcode-block" id="Blueprint.app_url_defaults"><a class="viewcode-back" href="../../flask/flask.html#flask.blueprints.Blueprint.app_url_defaults">[docs]</a>    <span class="k">def</span> <span class="nf">app_url_defaults</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">f</span><span class="p">):</span>
    426. 

  426.         <span class="sd">&quot;&quot;&quot;Same as :meth:`url_defaults` but application wide.</span>
    427. 

  427. <span class="sd">        &quot;&quot;&quot;</span>
    428. 

  428.         <span class="bp">self</span><span class="o">.</span><span class="n">record_once</span><span class="p">(</span><span class="k">lambda</span> <span class="n">s</span><span class="p">:</span> <span class="n">s</span><span class="o">.</span><span class="n">app</span><span class="o">.</span><span class="n">url_default_functions</span>
    429. 

  429.             <span class="o">.</span><span class="n">setdefault</span><span class="p">(</span><span class="kc">None</span><span class="p">,</span> <span class="p">[])</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">f</span><span class="p">))</span>
    430. 

  430.         <span class="k">return</span> <span class="n">f</span></div>
    431. 

  431. 

  432. <div class="viewcode-block" id="Blueprint.errorhandler"><a class="viewcode-back" href="../../flask/flask.html#flask.blueprints.Blueprint.errorhandler">[docs]</a>    <span class="k">def</span> <span class="nf">errorhandler</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">code_or_exception</span><span class="p">):</span>
    433. 

  433.         <span class="sd">&quot;&quot;&quot;Registers an error handler that becomes active for this blueprint</span>
    434. 

  434. <span class="sd">        only.  Please be aware that routing does not happen local to a</span>
    435. 

  435. <span class="sd">        blueprint so an error handler for 404 usually is not handled by</span>
    436. 

  436. <span class="sd">        a blueprint unless it is caused inside a view function.  Another</span>
    437. 

  437. <span class="sd">        special case is the 500 internal server error which is always looked</span>
    438. 

  438. <span class="sd">        up from the application.</span>
    439. 

  439. 

  440. <span class="sd">        Otherwise works as the :meth:`~flask.Flask.errorhandler` decorator</span>
    441. 

  441. <span class="sd">        of the :class:`~flask.Flask` object.</span>
    442. 

  442. <span class="sd">        &quot;&quot;&quot;</span>
    443. 

  443.         <span class="k">def</span> <span class="nf">decorator</span><span class="p">(</span><span class="n">f</span><span class="p">):</span>
    444. 

  444.             <span class="bp">self</span><span class="o">.</span><span class="n">record_once</span><span class="p">(</span><span class="k">lambda</span> <span class="n">s</span><span class="p">:</span> <span class="n">s</span><span class="o">.</span><span class="n">app</span><span class="o">.</span><span class="n">_register_error_handler</span><span class="p">(</span>
    445. 

  445.                 <span class="bp">self</span><span class="o">.</span><span class="n">name</span><span class="p">,</span> <span class="n">code_or_exception</span><span class="p">,</span> <span class="n">f</span><span class="p">))</span>
    446. 

  446.             <span class="k">return</span> <span class="n">f</span>
    447. 

  447.         <span class="k">return</span> <span class="n">decorator</span></div>
    448. 

  448. 

  449. <div class="viewcode-block" id="Blueprint.register_error_handler"><a class="viewcode-back" href="../../flask/flask.html#flask.blueprints.Blueprint.register_error_handler">[docs]</a>    <span class="k">def</span> <span class="nf">register_error_handler</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">code_or_exception</span><span class="p">,</span> <span class="n">f</span><span class="p">):</span>
    450. 

  450.         <span class="sd">&quot;&quot;&quot;Non-decorator version of the :meth:`errorhandler` error attach</span>
    451. 

  451. <span class="sd">        function, akin to the :meth:`~flask.Flask.register_error_handler`</span>
    452. 

  452. <span class="sd">        application-wide function of the :class:`~flask.Flask` object but</span>
    453. 

  453. <span class="sd">        for error handlers limited to this blueprint.</span>
    454. 

  454. 

  455. <span class="sd">        .. versionadded:: 0.11</span>
    456. 

  456. <span class="sd">        &quot;&quot;&quot;</span>
    457. 

  457.         <span class="bp">self</span><span class="o">.</span><span class="n">record_once</span><span class="p">(</span><span class="k">lambda</span> <span class="n">s</span><span class="p">:</span> <span class="n">s</span><span class="o">.</span><span class="n">app</span><span class="o">.</span><span class="n">_register_error_handler</span><span class="p">(</span>
    458. 

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