mirror of
https://github.com/django/django.git
synced 2024-12-22 17:16:24 +00:00
73 lines
2.4 KiB
Plaintext
73 lines
2.4 KiB
Plaintext
======================================
|
|
JavaScript customizations in the admin
|
|
======================================
|
|
|
|
.. _admin-javascript-inline-form-events:
|
|
|
|
Inline form events
|
|
==================
|
|
|
|
You may want to execute some JavaScript when an inline form is added or removed
|
|
in the admin change form. The ``formset:added`` and ``formset:removed`` events
|
|
allow this. ``event.detail.formsetName`` is the formset the row belongs to.
|
|
For the ``formset:added`` event, ``event.target`` is the newly added row.
|
|
|
|
In your custom ``change_form.html`` template, extend the
|
|
``admin_change_form_document_ready`` block and add the event listener code:
|
|
|
|
.. code-block:: html+django
|
|
|
|
{% extends 'admin/change_form.html' %}
|
|
{% load static %}
|
|
|
|
{% block admin_change_form_document_ready %}
|
|
{{ block.super }}
|
|
<script src="{% static 'app/formset_handlers.js' %}"></script>
|
|
{% endblock %}
|
|
|
|
.. code-block:: javascript
|
|
:caption: ``app/static/app/formset_handlers.js``
|
|
|
|
document.addEventListener('formset:added', (event) => {
|
|
if (event.detail.formsetName == 'author_set') {
|
|
// Do something
|
|
}
|
|
});
|
|
document.addEventListener('formset:removed', (event) => {
|
|
// Row removed
|
|
});
|
|
|
|
Two points to keep in mind:
|
|
|
|
* The JavaScript code must go in a template block if you are inheriting
|
|
``admin/change_form.html`` or it won't be rendered in the final HTML.
|
|
* ``{{ block.super }}`` is added because Django's
|
|
``admin_change_form_document_ready`` block contains JavaScript code to handle
|
|
various operations in the change form and we need that to be rendered too.
|
|
|
|
Supporting versions of Django older than 4.1
|
|
--------------------------------------------
|
|
|
|
If your event listener still has to support older versions of Django you have
|
|
to use jQuery to register your event listener. jQuery handles JavaScript events
|
|
but the reverse isn't true.
|
|
|
|
You could check for the presence of ``event.detail.formsetName`` and fall back
|
|
to the old listener signature as follows:
|
|
|
|
.. code-block:: javascript
|
|
|
|
function handleFormsetAdded(row, formsetName) {
|
|
// Do something
|
|
}
|
|
|
|
$(document).on('formset:added', (event, $row, formsetName) => {
|
|
if (event.detail && event.detail.formsetName) {
|
|
// Django >= 4.1
|
|
handleFormsetAdded(event.target, event.detail.formsetName)
|
|
} else {
|
|
// Django < 4.1, use $row and formsetName
|
|
handleFormsetAdded($row.get(0), formsetName)
|
|
}
|
|
})
|