Différences

Ci-dessous, les différences entre deux révisions de la page.

--- pele_mele:stack_exchange:stack_overflow:29987139 [2024/11/23 04:02] – supprimée - modification externe (Date inconnue) 127.0.0.1
+++ pele_mele:stack_exchange:stack_overflow:29987139 [2024/11/23 04:02] (Version actuelle) – ↷ Nom de la page changé de pele_mele:stack_exchange:stack_overflow:stackoverflow-29987139 à pele_mele:stack_exchange:stack_overflow:29987139 alexis
@@ Ligne 1: / Ligne 1: @@
+====== Symfony2 - Collection type is displayed twice in my view ======
+I have a form with a collection and I can see it properly when I use the following syntax:
+<code twig>
+form_row(form.items)
+</code>
+Then when I try to render it by myself, it is duplicated.
+Here is my code in my twig file:
+<code twig>
+{{ form_errors(form) }}
+{{ form_start(form) }}
+    ... some fields here ...
+    <div id="{{ form.items.vars.id }}" class="collection items" data-prototype="{{ form_widget(form.items.vars.prototype)|e }}">
+        <h3>{{ form_label(form.items) }}</h3>
+        <a href="#" class="add_link">Add</a>
+        {% for item in form.items %}
+            {{ form_row(item) }}
+        {% endfor %}
+    </div>
+    ... some other fields here ...
+{{ form_end(form) }}
+</code>
+Here is my code in my form object:
+<code php>
+    $builder->add('items', 'collection', array(
+        'type' => new ItemType(),
+        'allow_add' => true,
+        'allow_delete' => true,
+        'by_reference' => false,
+        'required' => true,
+    ));
+</code>
+Add here is my output:
+<code html>
+<!-- This is the one I need, I removed the prototype for the sake of clarity -->
+<div id="bundle_data_items" class="collection items" data-prototype="...">
+    <h3>
+        <label class="required">Items</label>
+    </h3>
+    <a href="#" class="add_link">Add</a>
+</div>
+<!-- This one is automatically added. The prototype is empty -->
+<div>
+    <label class="required">Items</label>
+    <div id="bundle_data_items" data-prototype=""></div>
+</div>
+</code>
+Do you have any ideas why this happens?
+I followed that [[http://symfony.com/doc/current/cookbook/form/form_collections.html|documentation]]. Did I miss something?
+**Edit**:
+This happens only when my collection is empty
+<WRAP help>
+I found the solution to that.
+It turns out that when the collection is empty, the rendering of it never occurs. I could use **sjagr** solution but as there is some fields I want to render automatically, I cannot use it.
+So my solution is the following:
+<code twig>
+{{ form_errors(form) }}
+{{ form_start(form) }}
+    ... some fields here ...
+    <div id="{{ form.items.vars.id }}" class="collection items" data-prototype="{{ form_widget(form.items.vars.prototype)|e }}">
+        <h3>{{ form_label(form.items) }}</h3>
+        <a href="#" class="add_link">Add</a>
+        {% for item in form.items %}
+            {{ form_row(item) }}
+        {% else %}
+            {% do form.items.setRendered %}
+        {% endfor %}
+    </div>
+    ... some other fields here ...
+{{ form_end(form) }}
+</code>
+</WRAP>
+<WRAP help>
+When your collection is empty, the ''for'' loop in ''{% for item in form.items %}'' never gets to execute, hence ''form_row(item)'' never happens. This means, to Twig/Symfony, you never actually outputted the field.
+Then you do ''form_end'' at the end of the form. This is not usually a big deal, but [[http://symfony.com/doc/current/reference/forms/twig_reference.html#form-end-view-variables|from the docs]]:
+> This helper also outputs ''form_rest()'' unless you set ''render_rest'' to false
+So, you must simply pass a ''false'' value for ''render_rest'':
+<code twig>
+{{ form_end(form, {'render_rest': false}) }}
+</code>
+I'm not sure how ''form_widget'' //did// fix your problem, but I'm also not sure how you tried that alternative - perhaps you ran it outside of the ''for'' loop.
+As an aside, you should consider making your own ''form.html.twig'' template file so you can reuse the markup format you've chosen for your collection. It will allow you to simply do ''form_widget(...)'' without having to break apart the pieces and your ''form_end'' will always consider the field to be outputted even if the collection is empty.
+</WRAP>
+<WRAP help>
+Unfortunately i cannot comment yet (no 50 rep), but perhaps this is caused the browser itself. A rendering issue due to markup someplace? See if the raw http response has the same thing. Since it works with form_row(form.items) but not your own, it "could be" that.
+I would check if it's empty also before outputting it.
+</WRAP>
+<WRAP info>
+[[https://stackoverflow.com/questions/29987139/symfony2-collection-type-is-displayed-twice-in-my-view|forms - Symfony2 - Collection type is displayed twice in my view - Stack Overflow]]
+</WRAP>