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<div class="section" id="yaml-mapping">
<h1>YAML Mapping<a class="headerlink" href="#yaml-mapping" title="Permalink to this headline"></a></h1>
<p>The YAML mapping driver enables you to provide the ODM metadata in
form of YAML documents.</p>
<p>The YAML mapping document of a class is loaded on-demand the first
time it is requested and subsequently stored in the metadata cache.
In order to work, this requires certain conventions:</p>
<ul class="simple">
<li>Each document/mapped superclass must get its own dedicated YAML
mapping document.</li>
<li>The name of the mapping document must consist of the fully
qualified name of the class, where namespace separators are
replaced by dots (.).</li>
<li>All mapping documents should get the extension &quot;.dcm.yml&quot; to
identify it as a Doctrine mapping file. This is more of a
convention and you are not forced to do this. You can change the
file extension easily enough.</li>
<li></li>
</ul>
<div class="highlight-php"><div class="highlight"><pre><span class="cp">&lt;?php</span>
<span class="nv">$driver</span><span class="o">-&gt;</span><span class="na">setFileExtension</span><span class="p">(</span><span class="s1">&#39;.yml&#39;</span><span class="p">);</span>
</pre></div>
</div>
<p>It is recommended to put all YAML mapping documents in a single
folder but you can spread the documents over several folders if you
want to. In order to tell the YamlDriver where to look for your
mapping documents, supply an array of paths as the first argument
of the constructor, like this:</p>
<div class="highlight-php"><div class="highlight"><pre><span class="cp">&lt;?php</span>
<span class="c1">// $config instanceof Doctrine\ODM\MongoDB\Configuration</span>
<span class="nv">$driver</span> <span class="o">=</span> <span class="k">new</span> <span class="nx">YamlDriver</span><span class="p">(</span><span class="k">array</span><span class="p">(</span><span class="s1">&#39;/path/to/files&#39;</span><span class="p">));</span>
<span class="nv">$config</span><span class="o">-&gt;</span><span class="na">setMetadataDriverImpl</span><span class="p">(</span><span class="nv">$driver</span><span class="p">);</span>
</pre></div>
</div>
<div class="section" id="simplified-yaml-driver">
<h2>Simplified YAML Driver<a class="headerlink" href="#simplified-yaml-driver" title="Permalink to this headline"></a></h2>
<p>The Symfony project sponsored a driver that simplifies usage of the YAML Driver.
The changes between the original driver are:</p>
<ol class="arabic simple">
<li>File Extension is .mongodb-odm.yml</li>
<li>Filenames are shortened, &quot;MyProject\Documents\User&quot; will become User.mongodb-odm.yml</li>
<li>You can add a global file and add multiple documents in this file.</li>
</ol>
<p>Configuration of this client works a little bit different:</p>
<div class="highlight-php"><div class="highlight"><pre><span class="cp">&lt;?php</span>
<span class="nv">$namespaces</span> <span class="o">=</span> <span class="k">array</span><span class="p">(</span>
<span class="s1">&#39;/path/to/files1&#39;</span> <span class="o">=&gt;</span> <span class="s1">&#39;MyProject\Documents&#39;</span><span class="p">,</span>
<span class="s1">&#39;/path/to/files2&#39;</span> <span class="o">=&gt;</span> <span class="s1">&#39;OtherProject\Documents&#39;</span>
<span class="p">);</span>
<span class="nv">$driver</span> <span class="o">=</span> <span class="k">new</span> <span class="nx">\Doctrine\ODM\MongoDB\Mapping\Driver\SimplifiedYamlDriver</span><span class="p">(</span><span class="nv">$namespaces</span><span class="p">);</span>
<span class="nv">$driver</span><span class="o">-&gt;</span><span class="na">setGlobalBasename</span><span class="p">(</span><span class="s1">&#39;global&#39;</span><span class="p">);</span> <span class="c1">// global.mongodb-odm.yml</span>
</pre></div>
</div>
<div class="section" id="example">
<h3>Example<a class="headerlink" href="#example" title="Permalink to this headline"></a></h3>
<p>As a quick start, here is a small example document that makes use
of several common elements:</p>
<div class="highlight-yaml"><div class="highlight"><pre><span class="c1"># Documents.User.dcm.yml</span>
<span class="l l-Scalar l-Scalar-Plain">Documents\User</span><span class="p p-Indicator">:</span>
<span class="l l-Scalar l-Scalar-Plain">db</span><span class="p p-Indicator">:</span> <span class="l l-Scalar l-Scalar-Plain">documents</span>
<span class="l l-Scalar l-Scalar-Plain">collection</span><span class="p p-Indicator">:</span> <span class="l l-Scalar l-Scalar-Plain">user</span>
<span class="l l-Scalar l-Scalar-Plain">fields</span><span class="p p-Indicator">:</span>
<span class="l l-Scalar l-Scalar-Plain">id</span><span class="p p-Indicator">:</span>
<span class="l l-Scalar l-Scalar-Plain">id</span><span class="p p-Indicator">:</span> <span class="l l-Scalar l-Scalar-Plain">true</span>
<span class="l l-Scalar l-Scalar-Plain">username</span><span class="p p-Indicator">:</span>
<span class="l l-Scalar l-Scalar-Plain">name</span><span class="p p-Indicator">:</span> <span class="l l-Scalar l-Scalar-Plain">login</span>
<span class="l l-Scalar l-Scalar-Plain">type</span><span class="p p-Indicator">:</span> <span class="l l-Scalar l-Scalar-Plain">string</span>
<span class="l l-Scalar l-Scalar-Plain">email</span><span class="p p-Indicator">:</span>
<span class="l l-Scalar l-Scalar-Plain">unique</span><span class="p p-Indicator">:</span>
<span class="l l-Scalar l-Scalar-Plain">order</span><span class="p p-Indicator">:</span> <span class="l l-Scalar l-Scalar-Plain">desc</span>
<span class="l l-Scalar l-Scalar-Plain">createdAt</span><span class="p p-Indicator">:</span>
<span class="l l-Scalar l-Scalar-Plain">type</span><span class="p p-Indicator">:</span> <span class="l l-Scalar l-Scalar-Plain">date</span>
<span class="l l-Scalar l-Scalar-Plain">indexes</span><span class="p p-Indicator">:</span>
<span class="l l-Scalar l-Scalar-Plain">index1</span><span class="p p-Indicator">:</span>
<span class="l l-Scalar l-Scalar-Plain">keys</span><span class="p p-Indicator">:</span>
<span class="l l-Scalar l-Scalar-Plain">username</span><span class="p p-Indicator">:</span> <span class="l l-Scalar l-Scalar-Plain">desc</span>
<span class="l l-Scalar l-Scalar-Plain">options</span><span class="p p-Indicator">:</span>
<span class="l l-Scalar l-Scalar-Plain">unique</span><span class="p p-Indicator">:</span> <span class="l l-Scalar l-Scalar-Plain">true</span>
<span class="l l-Scalar l-Scalar-Plain">dropDups</span><span class="p p-Indicator">:</span> <span class="l l-Scalar l-Scalar-Plain">true</span>
<span class="l l-Scalar l-Scalar-Plain">safe</span><span class="p p-Indicator">:</span> <span class="l l-Scalar l-Scalar-Plain">true</span>
<span class="l l-Scalar l-Scalar-Plain">embedOne</span><span class="p p-Indicator">:</span>
<span class="l l-Scalar l-Scalar-Plain">address</span><span class="p p-Indicator">:</span>
<span class="l l-Scalar l-Scalar-Plain">targetDocument</span><span class="p p-Indicator">:</span> <span class="l l-Scalar l-Scalar-Plain">Documents\Address</span>
<span class="l l-Scalar l-Scalar-Plain">embedMany</span><span class="p p-Indicator">:</span>
<span class="l l-Scalar l-Scalar-Plain">phonenumbers</span><span class="p p-Indicator">:</span>
<span class="l l-Scalar l-Scalar-Plain">targetDocument</span><span class="p p-Indicator">:</span> <span class="l l-Scalar l-Scalar-Plain">Documents\Phonenumber</span>
<span class="l l-Scalar l-Scalar-Plain">referenceOne</span><span class="p p-Indicator">:</span>
<span class="l l-Scalar l-Scalar-Plain">profile</span><span class="p p-Indicator">:</span>
<span class="l l-Scalar l-Scalar-Plain">targetDocument</span><span class="p p-Indicator">:</span> <span class="l l-Scalar l-Scalar-Plain">Documents\Profile</span>
<span class="l l-Scalar l-Scalar-Plain">cascade</span><span class="p p-Indicator">:</span> <span class="l l-Scalar l-Scalar-Plain">all</span>
<span class="l l-Scalar l-Scalar-Plain">account</span><span class="p p-Indicator">:</span>
<span class="l l-Scalar l-Scalar-Plain">targetDocument</span><span class="p p-Indicator">:</span> <span class="l l-Scalar l-Scalar-Plain">Documents\Account</span>
<span class="l l-Scalar l-Scalar-Plain">cascade</span><span class="p p-Indicator">:</span> <span class="l l-Scalar l-Scalar-Plain">all</span>
<span class="l l-Scalar l-Scalar-Plain">referenceMany</span><span class="p p-Indicator">:</span>
<span class="l l-Scalar l-Scalar-Plain">groups</span><span class="p p-Indicator">:</span>
<span class="l l-Scalar l-Scalar-Plain">targetDocument</span><span class="p p-Indicator">:</span> <span class="l l-Scalar l-Scalar-Plain">Documents\Group</span>
<span class="l l-Scalar l-Scalar-Plain">cascade</span><span class="p p-Indicator">:</span> <span class="l l-Scalar l-Scalar-Plain">all</span>
<span class="c1"># Alternative syntax for the exact same example</span>
<span class="c1"># (allows custom key name for embedded document and reference).</span>
<span class="l l-Scalar l-Scalar-Plain">Documents\User</span><span class="p p-Indicator">:</span>
<span class="l l-Scalar l-Scalar-Plain">db</span><span class="p p-Indicator">:</span> <span class="l l-Scalar l-Scalar-Plain">documents</span>
<span class="l l-Scalar l-Scalar-Plain">collection</span><span class="p p-Indicator">:</span> <span class="l l-Scalar l-Scalar-Plain">user</span>
<span class="l l-Scalar l-Scalar-Plain">fields</span><span class="p p-Indicator">:</span>
<span class="l l-Scalar l-Scalar-Plain">id</span><span class="p p-Indicator">:</span>
<span class="l l-Scalar l-Scalar-Plain">id</span><span class="p p-Indicator">:</span> <span class="l l-Scalar l-Scalar-Plain">true</span>
<span class="l l-Scalar l-Scalar-Plain">username</span><span class="p p-Indicator">:</span>
<span class="l l-Scalar l-Scalar-Plain">name</span><span class="p p-Indicator">:</span> <span class="l l-Scalar l-Scalar-Plain">login</span>
<span class="l l-Scalar l-Scalar-Plain">type</span><span class="p p-Indicator">:</span> <span class="l l-Scalar l-Scalar-Plain">string</span>
<span class="l l-Scalar l-Scalar-Plain">email</span><span class="p p-Indicator">:</span>
<span class="l l-Scalar l-Scalar-Plain">unique</span><span class="p p-Indicator">:</span>
<span class="l l-Scalar l-Scalar-Plain">order</span><span class="p p-Indicator">:</span> <span class="l l-Scalar l-Scalar-Plain">desc</span>
<span class="l l-Scalar l-Scalar-Plain">createdAt</span><span class="p p-Indicator">:</span>
<span class="l l-Scalar l-Scalar-Plain">type</span><span class="p p-Indicator">:</span> <span class="l l-Scalar l-Scalar-Plain">date</span>
<span class="l l-Scalar l-Scalar-Plain">address</span><span class="p p-Indicator">:</span>
<span class="l l-Scalar l-Scalar-Plain">embedded</span><span class="p p-Indicator">:</span> <span class="l l-Scalar l-Scalar-Plain">true</span>
<span class="l l-Scalar l-Scalar-Plain">type</span><span class="p p-Indicator">:</span> <span class="l l-Scalar l-Scalar-Plain">one</span>
<span class="l l-Scalar l-Scalar-Plain">targetDocument</span><span class="p p-Indicator">:</span> <span class="l l-Scalar l-Scalar-Plain">Documents\Address</span>
<span class="l l-Scalar l-Scalar-Plain">phonenumbers</span><span class="p p-Indicator">:</span>
<span class="l l-Scalar l-Scalar-Plain">embedded</span><span class="p p-Indicator">:</span> <span class="l l-Scalar l-Scalar-Plain">true</span>
<span class="l l-Scalar l-Scalar-Plain">type</span><span class="p p-Indicator">:</span> <span class="l l-Scalar l-Scalar-Plain">many</span>
<span class="l l-Scalar l-Scalar-Plain">targetDocument</span><span class="p p-Indicator">:</span> <span class="l l-Scalar l-Scalar-Plain">Documents\Phonenumber</span>
<span class="l l-Scalar l-Scalar-Plain">profile</span><span class="p p-Indicator">:</span>
<span class="l l-Scalar l-Scalar-Plain">reference</span><span class="p p-Indicator">:</span> <span class="l l-Scalar l-Scalar-Plain">true</span>
<span class="l l-Scalar l-Scalar-Plain">type</span><span class="p p-Indicator">:</span> <span class="l l-Scalar l-Scalar-Plain">one</span>
<span class="l l-Scalar l-Scalar-Plain">targetDocument</span><span class="p p-Indicator">:</span> <span class="l l-Scalar l-Scalar-Plain">Documents\Profile</span>
<span class="l l-Scalar l-Scalar-Plain">cascade</span><span class="p p-Indicator">:</span> <span class="l l-Scalar l-Scalar-Plain">all</span>
<span class="l l-Scalar l-Scalar-Plain">account</span><span class="p p-Indicator">:</span>
<span class="l l-Scalar l-Scalar-Plain">reference</span><span class="p p-Indicator">:</span> <span class="l l-Scalar l-Scalar-Plain">true</span>
<span class="l l-Scalar l-Scalar-Plain">type</span><span class="p p-Indicator">:</span> <span class="l l-Scalar l-Scalar-Plain">one</span>
<span class="l l-Scalar l-Scalar-Plain">targetDocument</span><span class="p p-Indicator">:</span> <span class="l l-Scalar l-Scalar-Plain">Documents\Account</span>
<span class="l l-Scalar l-Scalar-Plain">cascade</span><span class="p p-Indicator">:</span> <span class="l l-Scalar l-Scalar-Plain">all</span>
<span class="l l-Scalar l-Scalar-Plain">groups</span><span class="p p-Indicator">:</span>
<span class="l l-Scalar l-Scalar-Plain">reference</span><span class="p p-Indicator">:</span> <span class="l l-Scalar l-Scalar-Plain">true</span>
<span class="l l-Scalar l-Scalar-Plain">type</span><span class="p p-Indicator">:</span> <span class="l l-Scalar l-Scalar-Plain">many</span>
<span class="l l-Scalar l-Scalar-Plain">targetDocument</span><span class="p p-Indicator">:</span> <span class="l l-Scalar l-Scalar-Plain">Documents\Group</span>
<span class="l l-Scalar l-Scalar-Plain">cascade</span><span class="p p-Indicator">:</span> <span class="l l-Scalar l-Scalar-Plain">all</span>
<span class="l l-Scalar l-Scalar-Plain">indexes</span><span class="p p-Indicator">:</span>
<span class="l l-Scalar l-Scalar-Plain">index1</span><span class="p p-Indicator">:</span>
<span class="l l-Scalar l-Scalar-Plain">keys</span><span class="p p-Indicator">:</span>
<span class="l l-Scalar l-Scalar-Plain">username</span><span class="p p-Indicator">:</span> <span class="l l-Scalar l-Scalar-Plain">desc</span>
<span class="l l-Scalar l-Scalar-Plain">options</span><span class="p p-Indicator">:</span>
<span class="l l-Scalar l-Scalar-Plain">unique</span><span class="p p-Indicator">:</span> <span class="l l-Scalar l-Scalar-Plain">true</span>
<span class="l l-Scalar l-Scalar-Plain">dropDups</span><span class="p p-Indicator">:</span> <span class="l l-Scalar l-Scalar-Plain">true</span>
<span class="l l-Scalar l-Scalar-Plain">safe</span><span class="p p-Indicator">:</span> <span class="l l-Scalar l-Scalar-Plain">true</span>
</pre></div>
</div>
<p>Be aware that class-names specified in the YAML files should be fully qualified.</p>
<div class="admonition note">
<p class="first admonition-title">Note</p>
<p class="last">The <code class="docutils literal"><span class="pre">name</span></code> property is an optional setting to change name of the field
<strong>in the database</strong>. Specifying it is optional and defaults to the name
of mapped field.</p>
</div>
</div>
<div class="section" id="reference">
<h3>Reference<a class="headerlink" href="#reference" title="Permalink to this headline"></a></h3>
<div class="section" id="lock">
<span id="yml-reference-lock"></span><h4>Lock<a class="headerlink" href="#lock" title="Permalink to this headline"></a></h4>
<p>The field with the <code class="docutils literal"><span class="pre">lock</span></code> property will be used to store lock information for <a class="reference internal" href="transactions-and-concurrency.html#transactions-and-concurrency-pessimistic-locking"><span class="std std-ref">pessimistic locking</span></a>.
This is only compatible with the <code class="docutils literal"><span class="pre">int</span></code> field type, and cannot be combined with <code class="docutils literal"><span class="pre">id:</span> <span class="pre">true</span></code>.</p>
<div class="highlight-yaml"><div class="highlight"><pre><span class="l l-Scalar l-Scalar-Plain">lock</span><span class="p p-Indicator">:</span>
<span class="l l-Scalar l-Scalar-Plain">type</span><span class="p p-Indicator">:</span> <span class="l l-Scalar l-Scalar-Plain">int</span>
<span class="l l-Scalar l-Scalar-Plain">lock</span><span class="p p-Indicator">:</span> <span class="l l-Scalar l-Scalar-Plain">true</span>
</pre></div>
</div>
</div>
<div class="section" id="version">
<span id="yml-reference-version"></span><h4>Version<a class="headerlink" href="#version" title="Permalink to this headline"></a></h4>
<p>The field with the <code class="docutils literal"><span class="pre">version</span></code> property will be used to store version information for <a class="reference internal" href="transactions-and-concurrency.html#transactions-and-concurrency-optimistic-locking"><span class="std std-ref">optimistic locking</span></a>.
This is only compatible with <code class="docutils literal"><span class="pre">int</span></code> and <code class="docutils literal"><span class="pre">date</span></code> field types, and cannot be combined with <code class="docutils literal"><span class="pre">id:</span> <span class="pre">true</span></code>.</p>
<div class="highlight-yaml"><div class="highlight"><pre><span class="l l-Scalar l-Scalar-Plain">version</span><span class="p p-Indicator">:</span>
<span class="l l-Scalar l-Scalar-Plain">type</span><span class="p p-Indicator">:</span> <span class="l l-Scalar l-Scalar-Plain">int</span>
<span class="l l-Scalar l-Scalar-Plain">version</span><span class="p p-Indicator">:</span> <span class="l l-Scalar l-Scalar-Plain">true</span>
</pre></div>
</div>
<p>By default, Doctrine ODM updates <a class="reference internal" href="embedded-mapping.html#embed-many"><span class="std std-ref">embed-many</span></a> and
<a class="reference internal" href="reference-mapping.html#reference-many"><span class="std std-ref">reference-many</span></a> collections in separate write operations,
which do not bump the document version. Users employing document versioning are
encouraged to use the <a class="reference internal" href="storage-strategies.html#atomic-set"><span class="std std-ref">atomicSet</span></a> or
<a class="reference internal" href="storage-strategies.html#atomic-set-array"><span class="std std-ref">atomicSetArray</span></a> strategies for such collections, which
will ensure that collections are updated in the same write operation as the
versioned parent document.</p>
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<h3><a href="../index.html">Table Of Contents</a></h3>
<ul>
<li><a class="reference internal" href="#">YAML Mapping</a><ul>
<li><a class="reference internal" href="#simplified-yaml-driver">Simplified YAML Driver</a><ul>
<li><a class="reference internal" href="#example">Example</a></li>
<li><a class="reference internal" href="#reference">Reference</a><ul>
<li><a class="reference internal" href="#lock">Lock</a></li>
<li><a class="reference internal" href="#version">Version</a></li>
</ul>
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