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    <p>To understand what is happening here you have to understand data mapping first. When you call</p> <pre><code>$form-&gt;setData(array('photoname' =&gt; 'Foobar', 'size' =&gt; 500)); </code></pre> <p>the form's <em>data mapper</em> is responsible for taking the given array (or object) and writing the nested values into the fields of the form, i.e. calling</p> <pre><code>$form-&gt;get('photoname')-&gt;setData('Foobar'); $form-&gt;get('size')-&gt;setData(500); </code></pre> <p>But in your example, you are not dealing with <code>Form</code>, but with <code>FormBuilder</code> objects. <code>FormBuilder</code> is responsible for collecting the configuration of a form and using this information to produce a <code>Form</code> instance. As such, <code>FormBuilder</code> also lets you store the default data for the form. But since it's a simple configuration object only, it <em>will not invoke the data mapper</em> as of yet. For example:</p> <pre><code>$builder = $factory-&gt;createBuilder() -&gt;add('photoname') -&gt;add('size') -&gt;setData(array('photoname' =&gt; 'Foobar', 'size' =&gt; 500)); print_r($builder-&gt;get('photoname')-&gt;getData()); print_r($builder-&gt;get('size')-&gt;getData()); </code></pre> <p>This example will output:</p> <pre><code>null null </code></pre> <p>because data mapping takes place later, when we turn the <code>FormBuilder</code> into a <code>Form</code> instance. We can use this fact to set separate default values for the individual fields:</p> <pre><code>$builder-&gt;add('size', null, array('data' =&gt; 100)); // which is equivalent to $builder-&gt;get('size') -&gt;setData(100) -&gt;setDataLocked(true); print_r($builder-&gt;get('photoname')-&gt;getData()); print_r($builder-&gt;get('size')-&gt;getData()); </code></pre> <p>And the output:</p> <pre><code>null 100 </code></pre> <p>Data locking is required to prevent the data mapper from overriding the default data you just stored. This is done automatically if you pass the "data" option.</p> <p>At last, you will build the form. Now, <code>FormBuilder</code> calls <code>Form::setData()</code> where necessary, which in turn will invoke the data mapper:</p> <pre><code>$form = $builder-&gt;getForm(); // internally, the following methods are called: // 1) because of the default data configured for the "size" field $form-&gt;get('size')-&gt;setData(100); // 2) because of the default data configured for the main form $form-&gt;setData(array('photoname' =&gt; 'Foobar', 'size' =&gt; 500)); // 2a) as a result of data mapping $form-&gt;get('photoname')-&gt;setData('Foobar'); // 2b) as a result of data mapping (but ignored, because the data was locked) $form-&gt;get('size')-&gt;setData(500); </code></pre>
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    1. POsymfony 2.3 form getData doesn't work in subforms collections
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    1. USBernhard Schussek
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      1. VTUpMod
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    1. COSo, it's imposible to do what I'm triying??? :(
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      1. USAngel
    2. COYou only described what doesn't work, not what you're trying to do :) But my guess is that you want to use event listeners: http://symfony.com/doc/current/cookbook/form/dynamic_form_modification.html
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      1. USBernhard Schussek
    3. COI'm triying to do what Event listeners do without using Event Listeners. I only want to use the $builder->getData() to see some variables of the object, in the same way I would do in a first level form (not a subform). Is there any way to do this?
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