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81 lines
2.6 KiB
Text
81 lines
2.6 KiB
Text
======================================
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JavaScript customizations in the admin
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======================================
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.. _admin-javascript-inline-form-events:
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Inline form events
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==================
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You may want to execute some JavaScript when an inline form is added or removed
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in the admin change form. The ``formset:added`` and ``formset:removed`` jQuery
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events allow this. The event handler is passed three arguments:
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* ``event`` is the ``jQuery`` event.
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* ``$row`` is the newly added (or removed) row.
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* ``formsetName`` is the formset the row belongs to.
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The event is fired using the :ref:`django.jQuery namespace
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<contrib-admin-jquery>`.
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In your custom ``change_form.html`` template, extend the
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``admin_change_form_document_ready`` block and add the event listener code:
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.. code-block:: html+django
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{% extends 'admin/change_form.html' %}
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{% load static %}
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{% block admin_change_form_document_ready %}
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{{ block.super }}
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<script src="{% static 'app/formset_handlers.js' %}"></script>
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{% endblock %}
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.. code-block:: javascript
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:caption: app/static/app/formset_handlers.js
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(function($) {
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$(document).on('formset:added', function(event, $row, formsetName) {
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if (formsetName == 'author_set') {
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// Do something
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}
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});
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$(document).on('formset:removed', function(event, $row, formsetName) {
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// Row removed
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});
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})(django.jQuery);
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Two points to keep in mind:
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* The JavaScript code must go in a template block if you are inheriting
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``admin/change_form.html`` or it won't be rendered in the final HTML.
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* ``{{ block.super }}`` is added because Django's
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``admin_change_form_document_ready`` block contains JavaScript code to handle
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various operations in the change form and we need that to be rendered too.
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Sometimes you'll need to work with ``jQuery`` plugins that are not registered
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in the ``django.jQuery`` namespace. To do that, change how the code listens for
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events. Instead of wrapping the listener in the ``django.jQuery`` namespace,
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listen to the event triggered from there. For example:
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.. code-block:: html+django
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{% extends 'admin/change_form.html' %}
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{% load static %}
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{% block admin_change_form_document_ready %}
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{{ block.super }}
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<script src="{% static 'app/unregistered_handlers.js' %}"></script>
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{% endblock %}
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.. code-block:: javascript
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:caption: app/static/app/unregistered_handlers.js
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django.jQuery(document).on('formset:added', function(event, $row, formsetName) {
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// Row added
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});
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django.jQuery(document).on('formset:removed', function(event, $row, formsetName) {
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// Row removed
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});
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