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Merged
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Jan 10, 2018
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Move JavaScript to separate file #8205

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5594d7e
Move JavaScript to seperate file
technetium Jul 21, 2017
98b1c7b
Minor tweaks
javiereguiluz Jan 10, 2018
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101 changes: 55 additions & 46 deletions reference/forms/types/collection.rst
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Original file line number Diff line number Diff line change
Expand Up @@ -156,55 +156,64 @@ Using jQuery, a simple example might look like this. If you're rendering
your collection fields all at once (e.g. ``form_row(form.emails)``), then
things are even easier because the ``data-prototype`` attribute is rendered
automatically for you (with a slight difference - see note below) and all
you need is the JavaScript:
you need is this JavaScript code:

.. code-block:: javascript

// add-collection-widget.js
jQuery(document).ready(function () {
jQuery('.add-another-collection-widget').click(function (e) {
e.preventDefault();
var list = jQuery(jQuery(this).attr('data-list'));
// Try to find the counter of the list
var counter = list.data('widget-counter') | list.children().length;
// If the counter does not exist, use the length of the list
if (!counter) { counter = list.children().length; }

// grab the prototype template
var newWidget = list.attr('data-prototype');
// replace the "__name__" used in the id and name of the prototype
// with a number that's unique to your emails
// end name attribute looks like name="contact[emails][2]"
newWidget = newWidget.replace(/__name__/g, counter);
// Increase the counter
counter++;
// And store it, the length cannot be used if deleting widgets is allowed
list.data(' widget-counter', counter);

// create a new list element and add it to the list
var newElem = jQuery(list.attr('data-widget-tags')).html(newWidget);
newElem.appendTo(list);
});
});

And update the template as follows:

.. code-block:: html+twig

{{ form_start(form) }}
{# ... #}

{# store the prototype on the data-prototype attribute #}
<ul id="email-fields-list"
data-prototype="{{ form_widget(form.emails.vars.prototype)|e }}"
data-widget-tags="{{ '<li></li>'|e }}">
{% for emailField in form.emails %}
<li>
{{ form_errors(emailField) }}
{{ form_widget(emailField) }}
</li>
{% endfor %}
</ul>

.. configuration-block::
<a href="#"
class="add-another-collection-widget"
data-list="#email-field-list>Add another email</a>

.. code-block:: html+twig
{# ... #}
{{ form_end(form) }}

{{ form_start(form) }}
{# ... #}

{# store the prototype on the data-prototype attribute #}
<ul id="email-fields-list"
data-prototype="{{ form_widget(form.emails.vars.prototype)|e }}">
{% for emailField in form.emails %}
<li>
{{ form_errors(emailField) }}
{{ form_widget(emailField) }}
</li>
{% endfor %}
</ul>

<a href="#" id="add-another-email">Add another email</a>

{# ... #}
{{ form_end(form) }}

<script type="text/javascript">
// keep track of how many email fields have been rendered
var emailCount = '{{ form.emails|length }}';

jQuery(document).ready(function() {
jQuery('#add-another-email').click(function(e) {
e.preventDefault();

var emailList = jQuery('#email-fields-list');

// grab the prototype template
var newWidget = emailList.attr('data-prototype');
// replace the "__name__" used in the id and name of the prototype
// with a number that's unique to your emails
// end name attribute looks like name="contact[emails][2]"
newWidget = newWidget.replace(/__name__/g, emailCount);
emailCount++;

// create a new list element and add it to the list
var newLi = jQuery('<li></li>').html(newWidget);
newLi.appendTo(emailList);
});
})
</script>
<script src="add-collection-widget.js"></script>

.. tip::

Expand Down