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PONon-object error on a certified object
 

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    <p>I'm working on a Symfony form with non-entity fields (in a collection).</p> <p>(EDIT: All the code below is now working well!)</p> <h2>What we're talking about</h2> <p>For comprehension this is some code snippets : Form definition (in PieceType class):</p> <pre><code>// Form\Type\PieceType.php $builder -&gt;add('name', 'text', array('max_length' =&gt; 70, 'label' =&gt; "piece.name")) -&gt;add('compositors', 'collection', array('type' =&gt; 'entity', 'options' =&gt; array('class' =&gt; 'kalisonStdArchiveBundle:Person', 'property_path' =&gt; false), 'allow_add' =&gt; true, 'allow_delete' =&gt; true, 'property_path' =&gt; false, 'by_reference' =&gt; false, 'label' =&gt; 'piece.compositor' )); </code></pre> <p>The compositors fields are added using javascript, using the data-prototype (explained <a href="http://symfony.com/doc/current/reference/forms/types/collection.html#adding-and-removing-items" rel="nofollow">here</a>).</p> <p>The rendering is simply done using that view:</p> <pre><code>// Resources\views\Piece\piece.new.html.twig {% block javascripts %} {{ parent() }} &lt;script type="text/javascript"&gt;var nbCompositors = {{ form.compositors|length }}&lt;/script&gt; &lt;script type="text/javascript" src="{{ asset('bundles/kalisonstdarchive/js/piece.new.js') }}"&gt;&lt;/script&gt; {% endblock javascripts %} {% block main %} &lt;form novalidate action="{{ path("kalisonStdArchiveBundle_piece_new") }}" method="post" {{ form_enctype(form) }}&gt; {{ form_widget(form) }} &lt;button id="add-compositor"&gt;{{ "compositor.add"|trans }}&lt;/button&gt; &lt;input type="submit" id="submit" value="{{ "piece.create"|trans }}" name="submit" /&gt; &lt;/form&gt; {% endblock %} </code></pre> <p>The javascript associated is:</p> <pre><code>// Resources\public\js\piece.new.js $(document).ready(function() { jQuery('#add-compositor').click(function() { var list = jQuery('#kalison_stdarchivebundle_piecetype_compositors'); var newCompositor = list.attr('data-prototype'); newCompo = newCompositor.replace(/\$\$name\$\$/g, nbCompositors); nbCompositors++; var html = jQuery('&lt;p&gt;&lt;/p&gt;').html(newCompositor); html.appendTo(jQuery('#kalison_stdarchivebundle_piecetype_compositors')); return false; }); }); </code></pre> <p>And here is the action which manage the datas. As notified by @l3l0, I wasn't checking last iteration, which causes a $addCompositor null: </p> <pre><code>// Controller\PieceController.php $newPiece = new Piece(); $form = $this-&gt;get('form.factory')-&gt;create(new PieceType(), $newPiece); if ('POST' == $request-&gt;getMethod()) { $form-&gt;bindRequest($request); if ($form-&gt;isValid()) { $this-&gt;get('piece_manager')-&gt;savePiece($newPiece); if ($form["compositors"] != null) { foreach ($form["compositors"] as $formCompositor) { $addCompositor = $formCompositor-&gt;getData(); if ($addCompositor != null) { $newPerfomance = new Performance(); $newPerfomance-&gt;setPerson($addCompositor); // Throw Catchable Fatal Error $newPerfomance-&gt;setPiece($newPiece); $newPerfomance-&gt;setInstrument($instrument); $this-&gt;get('performance_manager')-&gt;savePerformance($newPerfomance); } } } } } </code></pre> <p>My problem is that I got a Symfony error telling that: <code>Argument 1 passed to Performance::setPerson() must be an instance of Person, null given</code>. (Of course, the method in Performance class is <code>public function setPerson(Person $person)</code>)</p> <h2>What I've tried</h2> <ul> <li><p>I tried to check for sure: <code>if (!is_object($addCompositor)) throw new Exception('NOT AN OBJECT');</code></p> <p>And yes, <code>$addCompositor</code> is really an object.</p></li> <li><p>I assumed it was an incompatible object, but if try to print the object: <code>var_dump($addCompositor)</code>.</p> <p>I'm not surprised to get: <code>object(...\Entity\Person)</code></p></li> <li><p>finally my last test was to call a method on this object: <code>echo $addCompositor-&gt;getLastName();</code>.</p> <p>Worked as well, printing the name - and just after throw this well known error: <code>Call to a member function getLastName() on a non-object</code>.</p></li> </ul> <p>So, my code looks like that now:</p> <pre><code>foreach ($form["compositors"] as $formCompositor) { $addCompositor = $formCompositor-&gt;getData(); if (!is_object($addCompositor)) throw new Exception('NOT AN OBJECT'); // Not throwing: it's an object var_dump($addCompositor); // Print a Person object echo $addCompositor-&gt;getLastName(); // Print the name, then break on "non-object" error $newPerfomance = new Performance(); $newPerfomance-&gt;setPerson($addCompositor); // Throw Catchable Fatal Error $newPerfomance-&gt;setPiece($newPiece); $newPerfomance-&gt;setInstrument($instrument); $this-&gt;get('performance_manager')-&gt;savePerformance($newPerfomance); } </code></pre> <h2>Where is your god now?</h2> <p>At first I thought it was a Symfony bug, but with that last test I'm a bit confused. Have you ever been facing that?</p>
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    1. COCheck the lines where these errors are thrown, add the code of these lines.
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    2. COI've add some explanations, is that enough? All the concerned code is here.
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    3. COdid you try to debug it with xdebug?
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