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<!doctype html><html lang=en class=no-js> <head><meta charset=utf-8><meta name=viewport content="width=device-width,initial-scale=1"><meta name=description content="A way to create simple reusable template components in Django."><link href=https://emilstenstrom.github.io/django-components/latest/concepts/fundamentals/component_context_scope/ rel=canonical><link href=../access_component_input/ rel=prev><link href=../template_tag_syntax/ rel=next><link rel=icon href=../../../assets/images/favicon.png><meta name=generator content="mkdocs-1.6.1, mkdocs-material-9.5.43"><title>Component context and scope - Django-Components</title><link rel=stylesheet href=../../../assets/stylesheets/main.0253249f.min.css><link rel=stylesheet href=../../../assets/stylesheets/palette.06af60db.min.css><link rel=preconnect href=https://fonts.gstatic.com crossorigin><link rel=stylesheet 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12.1C428.2 457.8 496 362.9 496 252 496 113.3 383.5 8 244.8 8M97.2 352.9c-1.3 1-1 3.3.7 5.2 1.6 1.6 3.9 2.3 5.2 1 1.3-1 1-3.3-.7-5.2-1.6-1.6-3.9-2.3-5.2-1m-10.8-8.1c-.7 1.3.3 2.9 2.3 3.9 1.6 1 3.6.7 4.3-.7.7-1.3-.3-2.9-2.3-3.9-2-.6-3.6-.3-4.3.7m32.4 35.6c-1.6 1.3-1 4.3 1.3 6.2 2.3 2.3 5.2 2.6 6.5 1 1.3-1.3.7-4.3-1.3-6.2-2.2-2.3-5.2-2.6-6.5-1m-11.4-14.7c-1.6 1-1.6 3.6 0 5.9s4.3 3.3 5.6 2.3c1.6-1.3 1.6-3.9 0-6.2-1.4-2.3-4-3.3-5.6-2"/></svg> </div> <div class=md-source__repository> EmilStenstrom/django-components </div> </a> </div> <ul class=md-nav__list data-md-scrollfix> <li class="md-nav__item md-nav__item--nested"> <input class="md-nav__toggle md-toggle md-toggle--indeterminate" type=checkbox id=__nav_1> <label class=md-nav__link for=__nav_1 id=__nav_1_label tabindex=0> <span class=md-ellipsis> Get Started </span> <span class="md-nav__icon md-icon"></span> </label> <nav class=md-nav data-md-level=1 aria-labelledby=__nav_1_label aria-expanded=false> <label class=md-nav__title for=__nav_1> <span class="md-nav__icon md-icon"></span> Get Started </label> <ul class=md-nav__list data-md-scrollfix> <li class=md-nav__item> <a href=../../../overview/welcome/ class=md-nav__link> <span class=md-ellipsis> Welcome to Django Components </span> </a> </li> <li class=md-nav__item> <a href=../../../overview/compatibility/ class=md-nav__link> <span class=md-ellipsis> Compatibility </span> </a> </li> <li class=md-nav__item> <a href=../../../overview/installation/ class=md-nav__link> <span class=md-ellipsis> Installation </span> </a> </li> <li class=md-nav__item> <a href=../../../overview/security_notes/ class=md-nav__link> <span class=md-ellipsis> Security notes 🚨 </span> </a> </li> <li class=md-nav__item> <a href=../../../overview/community/ class=md-nav__link> <span class=md-ellipsis> Community </span> </a> </li> <li class=md-nav__item> <a href=../../../overview/contributing/ class=md-nav__link> <span class=md-ellipsis> Contributing </span> </a> </li> <li class=md-nav__item> <a href=../../../overview/development/ class=md-nav__link> <span class=md-ellipsis> Development </span> </a> </li> <li class=md-nav__item> <a href=../../../overview/code_of_conduct/ class=md-nav__link> <span class=md-ellipsis> Code of Conduct </span> </a> </li> <li class=md-nav__item> <a href=../../../overview/license/ class=md-nav__link> <span class=md-ellipsis> License </span> </a> </li> </ul> </nav> </li> <li class="md-nav__item md-nav__item--active md-nav__item--section md-nav__item--nested"> <input class="md-nav__toggle md-toggle " type=checkbox id=__nav_2 checked> <label class=md-nav__link for=__nav_2 id=__nav_2_label tabindex> <span class=md-ellipsis> Concepts </span> <span class="md-nav__icon md-icon"></span> </label> <nav class=md-nav data-md-level=1 aria-labelledby=__nav_2_label aria-expanded=true> <label class=md-nav__title for=__nav_2> <span class="md-nav__icon md-icon"></span> Concepts </label> <ul class=md-nav__list data-md-scrollfix> <li class="md-nav__item md-nav__item--active md-nav__item--section md-nav__item--nested"> <input class="md-nav__toggle md-toggle " type=checkbox id=__nav_2_1 checked> <label class=md-nav__link for=__nav_2_1 id=__nav_2_1_label tabindex> <span class=md-ellipsis> Fundamentals </span> <span class="md-nav__icon md-icon"></span> </label> <nav class=md-nav data-md-level=2 aria-labelledby=__nav_2_1_label aria-expanded=true> <label class=md-nav__title for=__nav_2_1> <span class="md-nav__icon md-icon"></span> Fundamentals </label> <ul class=md-nav__list data-md-scrollfix> <li class=md-nav__item> <a href=../your_first_component/ class=md-nav__link> <span class=md-ellipsis> Create your first component </span> </a> </li> <li class=md-nav__item> <a href=../single_file_components/ class=md-nav__link> <span class=md-ellipsis> Single-file components </span> </a> </li> <li class=md-nav__item> <a href=../components_in_templates/ class=md-nav__link> <span class=md-ellipsis> Components in templates </span> </a> </li> <li class=md-nav__item> <a href=../components_in_python/ class=md-nav__link> <span class=md-ellipsis> Components in Python </span> </a> </li> <li class=md-nav__item> <a href=../access_component_input/ class=md-nav__link> <span class=md-ellipsis> Accessing component inputs </span> </a> </li> <li class="md-nav__item md-nav__item--active"> <input class="md-nav__toggle md-toggle" type=checkbox id=__toc> <label class="md-nav__link md-nav__link--active" for=__toc> <span class=md-ellipsis> Component context and scope </span> <span class="md-nav__icon md-icon"></span> </label> <a href=./ class="md-nav__link md-nav__link--active"> <span class=md-ellipsis> Component context and scope </span> </a> <nav class="md-nav md-nav--secondary" aria-label="Table of contents"> <label class=md-nav__title for=__toc> <span class="md-nav__icon md-icon"></span> Table of contents </label> <ul class=md-nav__list data-md-component=toc data-md-scrollfix> <li class=md-nav__item> <a href=#example-of-accessing-outer-context class=md-nav__link> <span class=md-ellipsis> Example of Accessing Outer Context </span> </a> </li> <li class=md-nav__item> <a href=#context-behavior class=md-nav__link> <span class=md-ellipsis> Context behavior </span> </a> <nav class=md-nav aria-label="Context behavior"> <ul class=md-nav__list> <li class=md-nav__item> <a href=#example-django class=md-nav__link> <span class=md-ellipsis> Example "django" </span> </a> </li> <li class=md-nav__item> <a href=#example-isolated class=md-nav__link> <span class=md-ellipsis> Example "isolated" </span> </a> </li> </ul> </nav> </li> </ul> </nav> </li> <li class=md-nav__item> <a href=../template_tag_syntax/ class=md-nav__link> <span class=md-ellipsis> Template tag syntax </span> </a> </li> <li class=md-nav__item> <a href=../slots/ class=md-nav__link> <span class=md-ellipsis> Slots </span> </a> </li> <li class=md-nav__item> <a href=../html_attributes/ class=md-nav__link> <span class=md-ellipsis> HTML attributes </span> </a> </li> <li class=md-nav__item> <a href=../defining_js_css_html_files/ class=md-nav__link> <span class=md-ellipsis> Defining HTML / JS / CSS files </span> </a> </li> <li class=md-nav__item> <a href=../autodiscovery/ class=md-nav__link> <span class=md-ellipsis> Autodiscovery </span> </a> </li> <li class=md-nav__item> <a href=../components_as_views/ class=md-nav__link> <span class=md-ellipsis> Components as views </span> </a> </li> </ul> </nav> </li> <li class="md-nav__item md-nav__item--section md-nav__item--nested"> <input class="md-nav__toggle md-toggle md-toggle--indeterminate" type=checkbox id=__nav_2_2> <label class=md-nav__link for=__nav_2_2 id=__nav_2_2_label tabindex> <span class=md-ellipsis> Advanced </span> <span class="md-nav__icon md-icon"></span> </label> <nav class=md-nav data-md-level=2 aria-labelledby=__nav_2_2_label aria-expanded=false> <label class=md-nav__title for=__nav_2_2> <span class="md-nav__icon md-icon"></span> Advanced </label> <ul class=md-nav__list data-md-scrollfix> <li class=md-nav__item> <a href=../../advanced/rendering_js_css/ class=md-nav__link> <span class=md-ellipsis> Rendering JS / CSS </span> </a> </li> <li class=md-nav__item> <a href=../../advanced/provide_inject/ class=md-nav__link> <span class=md-ellipsis> Prop drilling and provide / inject </span> </a> </li> <li class=md-nav__item> <a href=../../advanced/hooks/ class=md-nav__link> <span class=md-ellipsis> Lifecycle hooks </span> </a> </li> <li class=md-nav__item> <a href=../../advanced/component_registry/ class=md-nav__link> <span class=md-ellipsis> Registering components </span> </a> </li> <li class=md-nav__item> <a href=../../advanced/typing_and_validation/ class=md-nav__link> <span class=md-ellipsis> Typing and validation </span> </a> </li> <li class=md-nav__item> <a href=../../advanced/tag_formatter/ class=md-nav__link> <span class=md-ellipsis> Tag formatters </span> </a> </li> <li class=md-nav__item> <a href=../../advanced/authoring_component_libraries/ class=md-nav__link> <span class=md-ellipsis> Authoring component libraries </span> </a> </li> </ul> </nav> </li> </ul> </nav> </li> <li class="md-nav__item md-nav__item--nested"> <input class="md-nav__toggle md-toggle md-toggle--indeterminate" type=checkbox id=__nav_3> <label class=md-nav__link for=__nav_3 id=__nav_3_label tabindex=0> <span class=md-ellipsis> Guides </span> <span class="md-nav__icon md-icon"></span> </label> <nav class=md-nav data-md-level=1 aria-labelledby=__nav_3_label aria-expanded=false> <label class=md-nav__title for=__nav_3> <span class="md-nav__icon md-icon"></span> Guides </label> <ul class=md-nav__list data-md-scrollfix> <li class="md-nav__item md-nav__item--nested"> <input class="md-nav__toggle md-toggle md-toggle--indeterminate" type=checkbox id=__nav_3_1> <label class=md-nav__link for=__nav_3_1 id=__nav_3_1_label tabindex=0> <span class=md-ellipsis> Setup </span> <span class="md-nav__icon md-icon"></span> </label> <nav class=md-nav data-md-level=2 aria-labelledby=__nav_3_1_label aria-expanded=false> <label class=md-nav__title for=__nav_3_1> <span class="md-nav__icon md-icon"></span> Setup </label> <ul class=md-nav__list data-md-scrollfix> <li class=md-nav__item> <a href=../../../guides/setup/syntax_highlight/ class=md-nav__link> <span class=md-ellipsis> Syntax highlighting </span> </a> </li> <li class=md-nav__item> <a href=../../../guides/setup/dev_server_setup/ class=md-nav__link> <span class=md-ellipsis> Running with development server </span> </a> </li> <li class=md-nav__item> <a href=../../../guides/setup/logging_and_debugging/ class=md-nav__link> <span class=md-ellipsis> Logging and debugging </span> </a> </li> </ul> </nav> </li> <li class=md-nav__item> <a href=../../../guides/cookbook class=md-nav__link> <span class=md-ellipsis> Cookbook </span> </a> </li> </ul> </nav> </li> <li class=md-nav__item> <a href=../../../reference class=md-nav__link> <span class=md-ellipsis> API Documentation </span> </a> </li> <li class=md-nav__item> <a href=../../../release_notes/ class=md-nav__link> <span class=md-ellipsis> Release notes </span> </a> </li> </ul> </nav> </div> </div> </div> <div class="md-sidebar md-sidebar--secondary" data-md-component=sidebar data-md-type=toc> <div class=md-sidebar__scrollwrap> <div class=md-sidebar__inner> <nav class="md-nav md-nav--secondary" aria-label="Table of contents"> <label class=md-nav__title for=__toc> <span class="md-nav__icon md-icon"></span> Table of contents </label> <ul class=md-nav__list data-md-component=toc data-md-scrollfix> <li class=md-nav__item> <a href=#example-of-accessing-outer-context class=md-nav__link> <span class=md-ellipsis> Example of Accessing Outer Context </span> </a> </li> <li class=md-nav__item> <a href=#context-behavior class=md-nav__link> <span class=md-ellipsis> Context behavior </span> </a> <nav class=md-nav aria-label="Context behavior"> <ul class=md-nav__list> <li class=md-nav__item> <a href=#example-django class=md-nav__link> <span class=md-ellipsis> Example "django" </span> </a> </li> <li class=md-nav__item> <a href=#example-isolated class=md-nav__link> <span class=md-ellipsis> Example "isolated" </span> </a> </li> </ul> </nav> </li> </ul> </nav> </div> </div> </div> <div class=md-content data-md-component=content> <article class="md-content__inner md-typeset"> <a href=https://github.com/EmilStenstrom/django-components/edit/master/src/docs/concepts/fundamentals/component_context_scope.md title="Edit this page" class="md-content__button md-icon"> <svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 24 24"><path d="M10 20H6V4h7v5h5v3.1l2-2V8l-6-6H6c-1.1 0-2 .9-2 2v16c0 1.1.9 2 2 2h4zm10.2-7c.1 0 .3.1.4.2l1.3 1.3c.2.2.2.6 0 .8l-1 1-2.1-2.1 1-1c.1-.1.2-.2.4-.2m0 3.9L14.1 23H12v-2.1l6.1-6.1z"/></svg> </a> <a href=https://github.com/EmilStenstrom/django-components/raw/master/src/docs/concepts/fundamentals/component_context_scope.md title="View source of this page" class="md-content__button md-icon"> <svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 24 24"><path d="M17 18c.56 0 1 .44 1 1s-.44 1-1 1-1-.44-1-1 .44-1 1-1m0-3c-2.73 0-5.06 1.66-6 4 .94 2.34 3.27 4 6 4s5.06-1.66 6-4c-.94-2.34-3.27-4-6-4m0 6.5a2.5 2.5 0 0 1-2.5-2.5 2.5 2.5 0 0 1 2.5-2.5 2.5 2.5 0 0 1 2.5 2.5 2.5 2.5 0 0 1-2.5 2.5M9.27 20H6V4h7v5h5v4.07c.7.08 1.36.25 2 .49V8l-6-6H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h4.5a8.2 8.2 0 0 1-1.23-2"/></svg> </a> <h1>Component context and scope</h1> <p>By default, context variables are passed down the template as in regular Django - deeper scopes can access the variables from the outer scopes. So if you have several nested forloops, then inside the deep-most loop you can access variables defined by all previous loops.</p> <p>With this in mind, the <code>{% component %}</code> tag behaves similarly to <code>{% include %}</code> tag - inside the component tag, you can access all variables that were defined outside of it.</p> <p>And just like with <code>{% include %}</code>, if you don't want a specific component template to have access to the parent context, add <code>only</code> to the <code>{% component %}</code> tag:</p> <div class=highlight><pre><span></span><code><a id=__codelineno-0-1 name=__codelineno-0-1 href=#__codelineno-0-1></a><span class=cp>{%</span> <span class=k>component</span> <span class=s2>"calendar"</span> <span class=nv>date</span><span class=o>=</span><span class=s2>"2015-06-19"</span> <span class=nv>only</span> <span class=o>/</span> <span class=cp>%}</span>
|
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</code></pre></div> <p>NOTE: <code>{% csrf_token %}</code> tags need access to the top-level context, and they will not function properly if they are rendered in a component that is called with the <code>only</code> modifier.</p> <p>If you find yourself using the <code>only</code> modifier often, you can set the <a href=#context-behavior>context_behavior</a> option to <code>"isolated"</code>, which automatically applies the <code>only</code> modifier. This is useful if you want to make sure that components don't accidentally access the outer context.</p> <p>Components can also access the outer context in their context methods like <code>get_context_data</code> by accessing the property <code>self.outer_context</code>.</p> <h2 id=example-of-accessing-outer-context>Example of Accessing Outer Context<a class=headerlink href=#example-of-accessing-outer-context title="Permanent link">¤</a></h2> <div class=highlight><pre><span></span><code><a id=__codelineno-1-1 name=__codelineno-1-1 href=#__codelineno-1-1></a><span class=x><div></span>
|
||
<a id=__codelineno-1-2 name=__codelineno-1-2 href=#__codelineno-1-2></a><span class=x> </span><span class=cp>{%</span> <span class=k>component</span> <span class=s2>"calender"</span> <span class=o>/</span> <span class=cp>%}</span>
|
||
<a id=__codelineno-1-3 name=__codelineno-1-3 href=#__codelineno-1-3></a><span class=x></div></span>
|
||
</code></pre></div> <p>Assuming that the rendering context has variables such as <code>date</code>, you can use <code>self.outer_context</code> to access them from within <code>get_context_data</code>. Here's how you might implement it:</p> <div class=highlight><pre><span></span><code><a id=__codelineno-2-1 name=__codelineno-2-1 href=#__codelineno-2-1></a><span class=k>class</span> <span class=nc>Calender</span><span class=p>(</span><span class=n>Component</span><span class=p>):</span>
|
||
<a id=__codelineno-2-2 name=__codelineno-2-2 href=#__codelineno-2-2></a>
|
||
<a id=__codelineno-2-3 name=__codelineno-2-3 href=#__codelineno-2-3></a> <span class=o>...</span>
|
||
<a id=__codelineno-2-4 name=__codelineno-2-4 href=#__codelineno-2-4></a>
|
||
<a id=__codelineno-2-5 name=__codelineno-2-5 href=#__codelineno-2-5></a> <span class=k>def</span> <span class=nf>get_context_data</span><span class=p>(</span><span class=bp>self</span><span class=p>):</span>
|
||
<a id=__codelineno-2-6 name=__codelineno-2-6 href=#__codelineno-2-6></a> <span class=n>outer_field</span> <span class=o>=</span> <span class=bp>self</span><span class=o>.</span><span class=n>outer_context</span><span class=p>[</span><span class=s2>"date"</span><span class=p>]</span>
|
||
<a id=__codelineno-2-7 name=__codelineno-2-7 href=#__codelineno-2-7></a> <span class=k>return</span> <span class=p>{</span>
|
||
<a id=__codelineno-2-8 name=__codelineno-2-8 href=#__codelineno-2-8></a> <span class=s2>"date"</span><span class=p>:</span> <span class=n>outer_fields</span><span class=p>,</span>
|
||
<a id=__codelineno-2-9 name=__codelineno-2-9 href=#__codelineno-2-9></a> <span class=p>}</span>
|
||
</code></pre></div> <p>However, as a best practice, it’s recommended not to rely on accessing the outer context directly through <code>self.outer_context</code>. Instead, explicitly pass the variables to the component. For instance, continue passing the variables in the component tag as shown in the previous examples.</p> <h2 id=context-behavior>Context behavior<a class=headerlink href=#context-behavior title="Permanent link">¤</a></h2> <p>django_components supports both Django and Vue-like behavior when it comes to passing data to and through components. This can be configured in <a href=../../../reference/settings#context_behavior>context_behavior</a>.</p> <p>This has two modes:</p> <ul> <li> <p><code>"django"</code></p> <p>The default Django template behavior.</p> <p>Inside the <a href=../../../reference/template_tags#fill><code>{% fill %}</code></a> tag, the context variables you can access are a union of:</p> <ul> <li>All the variables that were OUTSIDE the fill tag, including any\ <a href=https://docs.djangoproject.com/en/5.1/ref/templates/builtins/#with><code>{% with %}</code></a> tags.</li> <li>Any loops (<a href=https://docs.djangoproject.com/en/5.1/ref/templates/builtins/#cycle><code>{% for ... %}</code></a>) that the <code>{% fill %}</code> tag is part of.</li> <li>Data returned from <a href=../../../reference/api#django_components.Component.get_context_data><code>Component.get_context_data()</code></a> of the component that owns the fill tag.</li> </ul> </li> <li> <p><code>"isolated"</code></p> <p>Similar behavior to <a href=https://vuejs.org/guide/components/slots.html#render-scope>Vue</a> or React, this is useful if you want to make sure that components don't accidentally access variables defined outside of the component.</p> <p>Inside the <a href=../../../reference/template_tags#fill><code>{% fill %}</code></a> tag, you can ONLY access variables from 2 places:</p> <ul> <li>Any loops (<a href=https://docs.djangoproject.com/en/5.1/ref/templates/builtins/#cycle><code>{% for ... %}</code></a>) that the <code>{% fill %}</code> tag is part of.</li> <li><a href=../../../reference/api#django_components.Component.get_context_data><code>Component.get_context_data()</code></a> of the component which defined the template (AKA the "root" component).</li> </ul> </li> </ul> <div class="admonition warning"> <p class=admonition-title>Warning</p> <p>Notice that the component whose <code>get_context_data()</code> we use inside <a href=../../../reference/template_tags#fill><code>{% fill %}</code></a> is NOT the same across the two modes!</p> <p>Consider this example:</p> <div class=highlight><pre><span></span><code><a id=__codelineno-3-1 name=__codelineno-3-1 href=#__codelineno-3-1></a><span class=k>class</span> <span class=nc>Outer</span><span class=p>(</span><span class=n>Component</span><span class=p>):</span>
|
||
<a id=__codelineno-3-2 name=__codelineno-3-2 href=#__codelineno-3-2></a> <span class=n>template</span> <span class=o>=</span> \<span class=s2>"</span><span class=se>\"\"</span>
|
||
<a id=__codelineno-3-3 name=__codelineno-3-3 href=#__codelineno-3-3></a> <span class=o><</span><span class=n>div</span><span class=o>></span>
|
||
<a id=__codelineno-3-4 name=__codelineno-3-4 href=#__codelineno-3-4></a> <span class=p>{</span><span class=o>%</span> <span class=n>component</span> <span class=s2>"inner"</span> <span class=o>%</span><span class=p>}</span>
|
||
<a id=__codelineno-3-5 name=__codelineno-3-5 href=#__codelineno-3-5></a> <span class=p>{</span><span class=o>%</span> <span class=n>fill</span> <span class=s2>"content"</span> <span class=o>%</span><span class=p>}</span>
|
||
<a id=__codelineno-3-6 name=__codelineno-3-6 href=#__codelineno-3-6></a> <span class=p>{{</span> <span class=n>my_var</span> <span class=p>}}</span>
|
||
<a id=__codelineno-3-7 name=__codelineno-3-7 href=#__codelineno-3-7></a> <span class=p>{</span><span class=o>%</span> <span class=n>endfill</span> <span class=o>%</span><span class=p>}</span>
|
||
<a id=__codelineno-3-8 name=__codelineno-3-8 href=#__codelineno-3-8></a> <span class=p>{</span><span class=o>%</span> <span class=n>endcomponent</span> <span class=o>%</span><span class=p>}</span>
|
||
<a id=__codelineno-3-9 name=__codelineno-3-9 href=#__codelineno-3-9></a> <span class=o></</span><span class=n>div</span><span class=o>></span>
|
||
<a id=__codelineno-3-10 name=__codelineno-3-10 href=#__codelineno-3-10></a> \<span class=s2>"</span><span class=se>\"\"</span>
|
||
</code></pre></div> <ul> <li> <p><code>"django"</code> - <code>my_var</code> has access to data from <code>get_context_data()</code> of both <code>Inner</code> and <code>Outer</code>. If there are variables defined in both, then <code>Inner</code> overshadows <code>Outer</code>.</p> </li> <li> <p><code>"isolated"</code> - <code>my_var</code> has access to data from <code>get_context_data()</code> of ONLY <code>Outer</code>.</p> </li> </ul> </div> <h3 id=example-django>Example "django"<a class=headerlink href=#example-django title="Permanent link">¤</a></h3> <p>Given this template:</p> <div class=highlight><pre><span></span><code><a id=__codelineno-4-1 name=__codelineno-4-1 href=#__codelineno-4-1></a><span class=nd>@register</span><span class=p>(</span><span class=s2>"root_comp"</span><span class=p>)</span>
|
||
<a id=__codelineno-4-2 name=__codelineno-4-2 href=#__codelineno-4-2></a><span class=k>class</span> <span class=nc>RootComp</span><span class=p>(</span><span class=n>Component</span><span class=p>):</span>
|
||
<a id=__codelineno-4-3 name=__codelineno-4-3 href=#__codelineno-4-3></a> <span class=n>template</span> <span class=o>=</span> <span class=s2>"""</span>
|
||
<a id=__codelineno-4-4 name=__codelineno-4-4 href=#__codelineno-4-4></a><span class=s2> {% with cheese="feta" %}</span>
|
||
<a id=__codelineno-4-5 name=__codelineno-4-5 href=#__codelineno-4-5></a><span class=s2> {</span><span class=si>% c</span><span class=s2>omponent 'my_comp' %}</span>
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||
<a id=__codelineno-4-6 name=__codelineno-4-6 href=#__codelineno-4-6></a><span class=s2> {{ my_var }} # my_var</span>
|
||
<a id=__codelineno-4-7 name=__codelineno-4-7 href=#__codelineno-4-7></a><span class=s2> {{ cheese }} # cheese</span>
|
||
<a id=__codelineno-4-8 name=__codelineno-4-8 href=#__codelineno-4-8></a><span class=s2> {</span><span class=si>% e</span><span class=s2>ndcomponent %}</span>
|
||
<a id=__codelineno-4-9 name=__codelineno-4-9 href=#__codelineno-4-9></a><span class=s2> {</span><span class=si>% e</span><span class=s2>ndwith %}</span>
|
||
<a id=__codelineno-4-10 name=__codelineno-4-10 href=#__codelineno-4-10></a><span class=s2> """</span>
|
||
<a id=__codelineno-4-11 name=__codelineno-4-11 href=#__codelineno-4-11></a>
|
||
<a id=__codelineno-4-12 name=__codelineno-4-12 href=#__codelineno-4-12></a> <span class=k>def</span> <span class=nf>get_context_data</span><span class=p>(</span><span class=bp>self</span><span class=p>):</span>
|
||
<a id=__codelineno-4-13 name=__codelineno-4-13 href=#__codelineno-4-13></a> <span class=k>return</span> <span class=p>{</span> <span class=s2>"my_var"</span><span class=p>:</span> <span class=mi>123</span> <span class=p>}</span>
|
||
</code></pre></div> <p>Then if <a href=../../../reference/api#django_components.Component.get_context_data><code>get_context_data()</code></a> of the component <code>"my_comp"</code> returns following data:</p> <div class=highlight><pre><span></span><code><a id=__codelineno-5-1 name=__codelineno-5-1 href=#__codelineno-5-1></a><span class=p>{</span> <span class=s2>"my_var"</span><span class=p>:</span> <span class=mi>456</span> <span class=p>}</span>
|
||
</code></pre></div> <p>Then the template will be rendered as:</p> <div class=highlight><pre><span></span><code><a id=__codelineno-6-1 name=__codelineno-6-1 href=#__codelineno-6-1></a><span class=x>456 # my_var</span>
|
||
<a id=__codelineno-6-2 name=__codelineno-6-2 href=#__codelineno-6-2></a><span class=x>feta # cheese</span>
|
||
</code></pre></div> <p>Because <code>"my_comp"</code> overshadows the outer variable <code>"my_var"</code>, so <code>{{ my_var }}</code> equals <code>456</code>.</p> <p>And variable <code>"cheese"</code> equals <code>feta</code>, because the fill CAN access all the data defined in the outer layers, like the <code>{% with %}</code> tag.</p> <h3 id=example-isolated>Example "isolated"<a class=headerlink href=#example-isolated title="Permanent link">¤</a></h3> <p>Given this template:</p> <div class=highlight><pre><span></span><code><a id=__codelineno-7-1 name=__codelineno-7-1 href=#__codelineno-7-1></a><span class=k>class</span> <span class=nc>RootComp</span><span class=p>(</span><span class=n>Component</span><span class=p>):</span>
|
||
<a id=__codelineno-7-2 name=__codelineno-7-2 href=#__codelineno-7-2></a> <span class=n>template</span> <span class=o>=</span> <span class=s2>"""</span>
|
||
<a id=__codelineno-7-3 name=__codelineno-7-3 href=#__codelineno-7-3></a><span class=s2> {% with cheese="feta" %}</span>
|
||
<a id=__codelineno-7-4 name=__codelineno-7-4 href=#__codelineno-7-4></a><span class=s2> {</span><span class=si>% c</span><span class=s2>omponent 'my_comp' %}</span>
|
||
<a id=__codelineno-7-5 name=__codelineno-7-5 href=#__codelineno-7-5></a><span class=s2> {{ my_var }} # my_var</span>
|
||
<a id=__codelineno-7-6 name=__codelineno-7-6 href=#__codelineno-7-6></a><span class=s2> {{ cheese }} # cheese</span>
|
||
<a id=__codelineno-7-7 name=__codelineno-7-7 href=#__codelineno-7-7></a><span class=s2> {</span><span class=si>% e</span><span class=s2>ndcomponent %}</span>
|
||
<a id=__codelineno-7-8 name=__codelineno-7-8 href=#__codelineno-7-8></a><span class=s2> {</span><span class=si>% e</span><span class=s2>ndwith %}</span>
|
||
<a id=__codelineno-7-9 name=__codelineno-7-9 href=#__codelineno-7-9></a><span class=s2> """</span>
|
||
<a id=__codelineno-7-10 name=__codelineno-7-10 href=#__codelineno-7-10></a>
|
||
<a id=__codelineno-7-11 name=__codelineno-7-11 href=#__codelineno-7-11></a> <span class=k>def</span> <span class=nf>get_context_data</span><span class=p>(</span><span class=bp>self</span><span class=p>):</span>
|
||
<a id=__codelineno-7-12 name=__codelineno-7-12 href=#__codelineno-7-12></a> <span class=k>return</span> <span class=p>{</span> <span class=s2>"my_var"</span><span class=p>:</span> <span class=mi>123</span> <span class=p>}</span>
|
||
</code></pre></div> <p>Then if <a href=../../../reference/api#django_components.Component.get_context_data><code>get_context_data()</code></a> of the component <code>"my_comp"</code> returns following data:</p> <div class=highlight><pre><span></span><code><a id=__codelineno-8-1 name=__codelineno-8-1 href=#__codelineno-8-1></a><span class=p>{</span> <span class=s2>"my_var"</span><span class=p>:</span> <span class=mi>456</span> <span class=p>}</span>
|
||
</code></pre></div> <p>Then the template will be rendered as:</p> <div class=highlight><pre><span></span><code><a id=__codelineno-9-1 name=__codelineno-9-1 href=#__codelineno-9-1></a><span class=x>123 # my_var</span>
|
||
<a id=__codelineno-9-2 name=__codelineno-9-2 href=#__codelineno-9-2></a><span class=x> # cheese</span>
|
||
</code></pre></div> <p>Because variables <code>"my_var"</code> and <code>"cheese"</code> are searched only inside <code>RootComponent.get_context_data()</code>. But since <code>"cheese"</code> is not defined there, it's empty.</p> <div class="admonition info"> <p class=admonition-title>Info</p> <p>Notice that the variables defined with the <a href=https://docs.djangoproject.com/en/5.1/ref/templates/builtins/#with><code>{% with %}</code></a> tag are ignored inside the <a href=../../../reference/template_tags#fill><code>{% fill %}</code></a> tag with the <code>"isolated"</code> mode.</p> </div> <aside class=md-source-file> <span class=md-source-file__fact> <span class=md-icon title="Last update"> <svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 24 24"><path d="M21 13.1c-.1 0-.3.1-.4.2l-1 1 2.1 2.1 1-1c.2-.2.2-.6 0-.8l-1.3-1.3c-.1-.1-.2-.2-.4-.2m-1.9 1.8-6.1 6V23h2.1l6.1-6.1zM12.5 7v5.2l4 2.4-1 1L11 13V7zM11 21.9c-5.1-.5-9-4.8-9-9.9C2 6.5 6.5 2 12 2c5.3 0 9.6 4.1 10 9.3-.3-.1-.6-.2-1-.2s-.7.1-1 .2C19.6 7.2 16.2 4 12 4c-4.4 0-8 3.6-8 8 0 4.1 3.1 7.5 7.1 7.9l-.1.2z"/></svg> </span> <span class="git-revision-date-localized-plugin git-revision-date-localized-plugin-timeago"><span class=timeago datetime=2024-12-02T08:54:59+00:00 locale=en></span></span><span class="git-revision-date-localized-plugin git-revision-date-localized-plugin-iso_date">2024-12-02</span> </span> <span class=md-source-file__fact> <span class=md-icon title=Contributors> <svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 24 24"><path d="M12 4a4 4 0 0 1 4 4 4 4 0 0 1-4 4 4 4 0 0 1-4-4 4 4 0 0 1 4-4m0 10c4.42 0 8 1.79 8 4v2H4v-2c0-2.21 3.58-4 8-4"/></svg> </span> <nav> <a href=mailto:juraj.oravec.josefson@gmail.com>Juro Oravec</a> </nav> </span> </aside> </article> </div> <script>var tabs=__md_get("__tabs");if(Array.isArray(tabs))e:for(var set of document.querySelectorAll(".tabbed-set")){var labels=set.querySelector(".tabbed-labels");for(var tab of tabs)for(var label of labels.getElementsByTagName("label"))if(label.innerText.trim()===tab){var input=document.getElementById(label.htmlFor);input.checked=!0;continue e}}</script> <script>var target=document.getElementById(location.hash.slice(1));target&&target.name&&(target.checked=target.name.startsWith("__tabbed_"))</script> </div> <button type=button class="md-top md-icon" data-md-component=top hidden> <svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 24 24"><path d="M13 20h-2V8l-5.5 5.5-1.42-1.42L12 4.16l7.92 7.92-1.42 1.42L13 8z"/></svg> Back to top </button> </main> <footer class=md-footer> <nav class="md-footer__inner md-grid" aria-label=Footer> <a href=../access_component_input/ class="md-footer__link md-footer__link--prev" aria-label="Previous: Accessing component inputs"> <div class="md-footer__button md-icon"> <svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 24 24"><path d="M20 11v2H8l5.5 5.5-1.42 1.42L4.16 12l7.92-7.92L13.5 5.5 8 11z"/></svg> </div> <div class=md-footer__title> <span class=md-footer__direction> Previous </span> <div class=md-ellipsis> Accessing component inputs </div> </div> </a> <a href=../template_tag_syntax/ class="md-footer__link md-footer__link--next" aria-label="Next: Template tag syntax"> <div class=md-footer__title> <span class=md-footer__direction> Next </span> <div class=md-ellipsis> Template tag syntax </div> </div> <div class="md-footer__button md-icon"> <svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 24 24"><path d="M4 11v2h12l-5.5 5.5 1.42 1.42L19.84 12l-7.92-7.92L10.5 5.5 16 11z"/></svg> </div> </a> </nav> <div class="md-footer-meta md-typeset"> <div class="md-footer-meta__inner md-grid"> <div class=md-copyright> Made with <a href=https://squidfunk.github.io/mkdocs-material/ target=_blank rel=noopener> Material for MkDocs </a> </div> <div class=md-social> <a href=https://github.com/EmilStenstrom/django-components target=_blank rel=noopener title=github.com class=md-social__link> <svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 496 512"><!-- Font Awesome Free 6.6.0 by @fontawesome - 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