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<div class="section" id="mapping-classes-to-the-orm-and-odm">
<h1>Mapping Classes to the ORM and ODM<a class="headerlink" href="#mapping-classes-to-the-orm-and-odm" title="Permalink to this headline"></a></h1>
<p>Because of the non intrusive design of Doctrine it is possible for you to have plain PHP classes
that are mapped to both a relational database with the Doctrine2 Object Relational Mapper and
MongoDB with the Doctrine MongoDB Object Document Mapper, or any other persistence layer that
implements the Doctrine Common <a class="reference external" href="https://github.com/doctrine/common/tree/master/lib/Doctrine/Common/Persistence">persistence</a> interfaces.</p>
<div class="section" id="test-subject">
<h2>Test Subject<a class="headerlink" href="#test-subject" title="Permalink to this headline"></a></h2>
<p>For this cookbook entry we need to define a class that can be persisted to both MySQL and MongoDB.
We'll use a <code class="docutils literal"><span class="pre">BlogPost</span></code> as you may want to write some generic blogging functionality that has support
for multiple Doctrine persistence layers:</p>
<div class="highlight-php"><div class="highlight"><pre><span class="cp">&lt;?php</span>
<span class="k">namespace</span> <span class="nx">Doctrine\Blog</span><span class="p">;</span>
<span class="k">class</span> <span class="nc">BlogPost</span>
<span class="p">{</span>
<span class="k">private</span> <span class="nv">$id</span><span class="p">;</span>
<span class="k">private</span> <span class="nv">$title</span><span class="p">;</span>
<span class="k">private</span> <span class="nv">$body</span><span class="p">;</span>
<span class="c1">// ...</span>
<span class="p">}</span>
</pre></div>
</div>
</div>
<div class="section" id="mapping-information">
<h2>Mapping Information<a class="headerlink" href="#mapping-information" title="Permalink to this headline"></a></h2>
<p>Now we just need to provide the mapping information for the Doctrine persistence layers so they know
how to consume the objects and persist them to the database.</p>
<div class="section" id="orm">
<h3>ORM<a class="headerlink" href="#orm" title="Permalink to this headline"></a></h3>
<p>First define the mapping for the ORM:</p>
<div class="configuration-block">
<ul class="simple">
<li><em>PHP</em><div class="highlight-php"><div class="highlight"><pre><span class="cp">&lt;?php</span>
<span class="k">namespace</span> <span class="nx">Doctrine\Blog</span><span class="p">;</span>
<span class="sd">/** @Entity(repositoryClass=&quot;Doctrine\Blog\ORM\BlogPostRepository&quot;) */</span>
<span class="k">class</span> <span class="nc">BlogPost</span>
<span class="p">{</span>
<span class="sd">/** @Id @Column(type=&quot;integer&quot;) */</span>
<span class="k">private</span> <span class="nv">$id</span><span class="p">;</span>
<span class="sd">/** @Column(type=&quot;string&quot;) */</span>
<span class="k">private</span> <span class="nv">$title</span><span class="p">;</span>
<span class="sd">/** @Column(type=&quot;text&quot;) */</span>
<span class="k">private</span> <span class="nv">$body</span><span class="p">;</span>
<span class="c1">// ...</span>
<span class="p">}</span>
</pre></div>
</div>
</li>
<li><em>XML</em><div class="highlight-xml"><div class="highlight"><pre><span class="cp">&lt;?xml version=&quot;1.0&quot; encoding=&quot;UTF-8&quot;?&gt;</span>
<span class="nt">&lt;doctrine-mapping</span> <span class="na">xmlns=</span><span class="s">&quot;http://doctrine-project.org/schemas/orm/doctrine-mapping&quot;</span>
<span class="na">xmlns:xsi=</span><span class="s">&quot;http://www.w3.org/2001/XMLSchema-instance&quot;</span>
<span class="na">xsi:schemaLocation=</span><span class="s">&quot;http://doctrine-project.org/schemas/orm/doctrine-mapping</span>
<span class="s"> http://www.doctrine-project.org/schemas/orm/doctrine-mapping.xsd&quot;</span><span class="nt">&gt;</span>
<span class="nt">&lt;entity</span> <span class="na">name=</span><span class="s">&quot;Documents\BlogPost&quot;</span> <span class="na">repository-class=</span><span class="s">&quot;Doctrine\Blog\ORM\BlogPostRepository&quot;</span><span class="nt">&gt;</span>
<span class="nt">&lt;id</span> <span class="na">name=</span><span class="s">&quot;id&quot;</span> <span class="na">type=</span><span class="s">&quot;integer&quot;</span> <span class="nt">/&gt;</span>
<span class="nt">&lt;field</span> <span class="na">name=</span><span class="s">&quot;name&quot;</span> <span class="na">type=</span><span class="s">&quot;string&quot;</span> <span class="nt">/&gt;</span>
<span class="nt">&lt;field</span> <span class="na">name=</span><span class="s">&quot;email&quot;</span> <span class="na">type=</span><span class="s">&quot;text&quot;</span> <span class="nt">/&gt;</span>
<span class="nt">&lt;/entity&gt;</span>
<span class="nt">&lt;/doctrine-mapping&gt;</span>
</pre></div>
</div>
</li>
<li><em>YAML</em><div class="highlight-yaml"><div class="highlight"><pre><span class="l l-Scalar l-Scalar-Plain">Documents\BlogPost</span><span class="p p-Indicator">:</span>
<span class="l l-Scalar l-Scalar-Plain">repositoryClass</span><span class="p p-Indicator">:</span> <span class="l l-Scalar l-Scalar-Plain">Doctrine\Blog\ORM\BlogPostRepository</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">type</span><span class="p p-Indicator">:</span> <span class="l l-Scalar l-Scalar-Plain">integer</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">title</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">string</span>
<span class="l l-Scalar l-Scalar-Plain">body</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">text</span>
</pre></div>
</div>
</li>
</ul>
</div>
<p>Now you are able to persist the <code class="docutils literal"><span class="pre">Documents\BlogPost</span></code> with an instance of <code class="docutils literal"><span class="pre">EntityManager</span></code>:</p>
<div class="highlight-php"><div class="highlight"><pre><span class="cp">&lt;?php</span>
<span class="nv">$blogPost</span> <span class="o">=</span> <span class="k">new</span> <span class="nx">BlogPost</span><span class="p">()</span>
<span class="nv">$blogPost</span><span class="o">-&gt;</span><span class="na">setTitle</span><span class="p">(</span><span class="s1">&#39;test&#39;</span><span class="p">);</span>
<span class="nv">$em</span><span class="o">-&gt;</span><span class="na">persist</span><span class="p">(</span><span class="nv">$blogPost</span><span class="p">);</span>
<span class="nv">$em</span><span class="o">-&gt;</span><span class="na">flush</span><span class="p">();</span>
</pre></div>
</div>
<p>You can find the blog post:</p>
<div class="highlight-php"><div class="highlight"><pre><span class="cp">&lt;?php</span>
<span class="nv">$blogPost</span> <span class="o">=</span> <span class="nv">$em</span><span class="o">-&gt;</span><span class="na">getRepository</span><span class="p">(</span><span class="s1">&#39;Documents\BlogPost&#39;</span><span class="p">)</span><span class="o">-&gt;</span><span class="na">findOneByTitle</span><span class="p">(</span><span class="s1">&#39;test&#39;</span><span class="p">);</span>
</pre></div>
</div>
</div>
<div class="section" id="mongodb-odm">
<h3>MongoDB ODM<a class="headerlink" href="#mongodb-odm" title="Permalink to this headline"></a></h3>
<p>Now map the same class to the Doctrine MongoDB ODM:</p>
<div class="configuration-block">
<ul class="simple">
<li><em>PHP</em><div class="highlight-php"><div class="highlight"><pre><span class="cp">&lt;?php</span>
<span class="k">namespace</span> <span class="nx">Documents</span><span class="p">;</span>
<span class="sd">/** @Document(repositoryClass=&quot;Doctrine\Blog\ODM\MongoDB\BlogPostRepository&quot;) */</span>
<span class="k">class</span> <span class="nc">BlogPost</span>
<span class="p">{</span>
<span class="sd">/** @Id */</span>
<span class="k">private</span> <span class="nv">$id</span><span class="p">;</span>
<span class="sd">/** @Field(type=&quot;string&quot;) */</span>
<span class="k">private</span> <span class="nv">$title</span><span class="p">;</span>
<span class="sd">/** @Field(type=&quot;string&quot;) */</span>
<span class="k">private</span> <span class="nv">$body</span><span class="p">;</span>
<span class="c1">// ...</span>
<span class="p">}</span>
</pre></div>
</div>
</li>
<li><em>XML</em><div class="highlight-xml"><div class="highlight"><pre><span class="cp">&lt;?xml version=&quot;1.0&quot; encoding=&quot;UTF-8&quot;?&gt;</span>
<span class="nt">&lt;doctrine-mongo-mapping</span> <span class="na">xmlns=</span><span class="s">&quot;http://doctrine-project.org/schemas/orm/doctrine-mapping&quot;</span>
<span class="na">xmlns:xsi=</span><span class="s">&quot;http://www.w3.org/2001/XMLSchema-instance&quot;</span>
<span class="na">xsi:schemaLocation=</span><span class="s">&quot;http://doctrine-project.org/schemas/orm/doctrine-mapping</span>
<span class="s"> http://www.doctrine-project.org/schemas/orm/doctrine-mapping.xsd&quot;</span><span class="nt">&gt;</span>
<span class="nt">&lt;document</span> <span class="na">name=</span><span class="s">&quot;Documents\BlogPost&quot;</span> <span class="na">repository-class=</span><span class="s">&quot;Doctrine\Blog\ODM\MongoDB\BlogPostRepository&quot;</span><span class="nt">&gt;</span>
<span class="nt">&lt;field</span> <span class="na">fieldName=</span><span class="s">&quot;id&quot;</span> <span class="na">type=</span><span class="s">&quot;id&quot;</span> <span class="nt">/&gt;</span>
<span class="nt">&lt;field</span> <span class="na">fieldName=</span><span class="s">&quot;name&quot;</span> <span class="na">type=</span><span class="s">&quot;string&quot;</span> <span class="nt">/&gt;</span>
<span class="nt">&lt;field</span> <span class="na">fieldName=</span><span class="s">&quot;email&quot;</span> <span class="na">type=</span><span class="s">&quot;text&quot;</span> <span class="nt">/&gt;</span>
<span class="nt">&lt;/document&gt;</span>
<span class="nt">&lt;/doctrine-mongo-mapping&gt;</span>
</pre></div>
</div>
</li>
<li><em>YAML</em><div class="highlight-yaml"><div class="highlight"><pre><span class="l l-Scalar l-Scalar-Plain">Documents\BlogPost</span><span class="p p-Indicator">:</span>
<span class="l l-Scalar l-Scalar-Plain">repositoryClass</span><span class="p p-Indicator">:</span> <span class="l l-Scalar l-Scalar-Plain">Doctrine\Blog\ODM\MongoDB\BlogPostRepository</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">type</span><span class="p p-Indicator">:</span> <span class="l l-Scalar l-Scalar-Plain">id</span>
<span class="l l-Scalar l-Scalar-Plain">title</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">string</span>
<span class="l l-Scalar l-Scalar-Plain">body</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">text</span>
</pre></div>
</div>
</li>
</ul>
</div>
<p>Now the same class is able to be persisted in the same way using an instance of <code class="docutils literal"><span class="pre">DocumentManager</span></code>:</p>
<div class="highlight-php"><div class="highlight"><pre><span class="cp">&lt;?php</span>
<span class="nv">$blogPost</span> <span class="o">=</span> <span class="k">new</span> <span class="nx">BlogPost</span><span class="p">()</span>
<span class="nv">$blogPost</span><span class="o">-&gt;</span><span class="na">setTitle</span><span class="p">(</span><span class="s1">&#39;test&#39;</span><span class="p">);</span>
<span class="nv">$dm</span><span class="o">-&gt;</span><span class="na">persist</span><span class="p">(</span><span class="nv">$blogPost</span><span class="p">);</span>
<span class="nv">$dm</span><span class="o">-&gt;</span><span class="na">flush</span><span class="p">();</span>
</pre></div>
</div>
<p>You can find the blog post:</p>
<div class="highlight-php"><div class="highlight"><pre><span class="cp">&lt;?php</span>
<span class="nv">$blogPost</span> <span class="o">=</span> <span class="nv">$dm</span><span class="o">-&gt;</span><span class="na">getRepository</span><span class="p">(</span><span class="s1">&#39;Documents\BlogPost&#39;</span><span class="p">)</span><span class="o">-&gt;</span><span class="na">findOneByTitle</span><span class="p">(</span><span class="s1">&#39;test&#39;</span><span class="p">);</span>
</pre></div>
</div>
</div>
</div>
<div class="section" id="repository-classes">
<h2>Repository Classes<a class="headerlink" href="#repository-classes" title="Permalink to this headline"></a></h2>
<p>You can implement the same repository interface for the ORM and MongoDB ODM easily:</p>
<div class="highlight-php"><div class="highlight"><pre><span class="cp">&lt;?php</span>
<span class="k">namespace</span> <span class="nx">Doctrine\Blog\ORM</span><span class="p">;</span>
<span class="k">use</span> <span class="nx">Doctrine\ORM\EntityRepository</span><span class="p">;</span>
<span class="k">class</span> <span class="nc">BlogPostRepository</span> <span class="k">extends</span> <span class="nx">EntityRepository</span>
<span class="p">{</span>
<span class="k">public</span> <span class="k">function</span> <span class="nf">findPostById</span><span class="p">(</span><span class="nv">$id</span><span class="p">)</span>
<span class="p">{</span>
<span class="k">return</span> <span class="nv">$this</span><span class="o">-&gt;</span><span class="na">findOneBy</span><span class="p">(</span><span class="k">array</span><span class="p">(</span><span class="s1">&#39;id&#39;</span> <span class="o">=&gt;</span> <span class="nv">$id</span><span class="p">));</span>
<span class="p">}</span>
<span class="p">}</span>
</pre></div>
</div>
<p>Now define the same repository methods for the MongoDB ODM:</p>
<div class="highlight-php"><div class="highlight"><pre><span class="cp">&lt;?php</span>
<span class="k">namespace</span> <span class="nx">Doctrine\Blog\ODM\MongoDB</span><span class="p">;</span>
<span class="k">use</span> <span class="nx">Doctrine\ODM\MongoDB\DocumentRepository</span><span class="p">;</span>
<span class="k">class</span> <span class="nc">BlogPostRepository</span> <span class="k">extends</span> <span class="nx">DocumentRepository</span>
<span class="p">{</span>
<span class="k">public</span> <span class="k">function</span> <span class="nf">findPostById</span><span class="p">(</span><span class="nv">$id</span><span class="p">)</span>
<span class="p">{</span>
<span class="k">return</span> <span class="nv">$this</span><span class="o">-&gt;</span><span class="na">findOneBy</span><span class="p">(</span><span class="k">array</span><span class="p">(</span><span class="s1">&#39;id&#39;</span> <span class="o">=&gt;</span> <span class="nv">$id</span><span class="p">));</span>
<span class="p">}</span>
<span class="p">}</span>
</pre></div>
</div>
<p>As you can see the repositories are the same and the final returned data is the same vanilla
PHP objects. The data is transparently injected to the objects for you automatically so you
are not forced to extend some base class or shape your domain in any certain way for it to work
with the Doctrine persistence layers.</p>
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<h3><a href="../index.html">Table Of Contents</a></h3>
<ul>
<li><a class="reference internal" href="#">Mapping Classes to the ORM and ODM</a><ul>
<li><a class="reference internal" href="#test-subject">Test Subject</a></li>
<li><a class="reference internal" href="#mapping-information">Mapping Information</a><ul>
<li><a class="reference internal" href="#orm">ORM</a></li>
<li><a class="reference internal" href="#mongodb-odm">MongoDB ODM</a></li>
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<li><a class="reference internal" href="#repository-classes">Repository Classes</a></li>
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