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<div class="section" id="storing-files-with-mongogridfs">
<h1>Storing Files with MongoGridFS<a class="headerlink" href="#storing-files-with-mongogridfs" title="Permalink to this headline"></a></h1>
<p>The PHP Mongo extension provides a nice and convenient way to store
files in chunks of data with the
<a class="reference external" href="http://us.php.net/manual/en/class.mongogridfs.php">MongoGridFS</a>.</p>
<p>It uses two database collections, one to store the metadata for the
file, and another to store the contents of the file. The contents
are stored in chunks to avoid going over the maximum allowed size
of a MongoDB document.</p>
<p>You can easily setup a Document that is stored using the
MongoGridFS:</p>
<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 */</span>
<span class="k">class</span> <span class="nc">Image</span>
<span class="p">{</span>
<span class="sd">/** @Id */</span>
<span class="k">private</span> <span class="nv">$id</span><span class="p">;</span>
<span class="sd">/** @Field */</span>
<span class="k">private</span> <span class="nv">$name</span><span class="p">;</span>
<span class="sd">/** @File */</span>
<span class="k">private</span> <span class="nv">$file</span><span class="p">;</span>
<span class="sd">/** @Field */</span>
<span class="k">private</span> <span class="nv">$uploadDate</span><span class="p">;</span>
<span class="sd">/** @Field */</span>
<span class="k">private</span> <span class="nv">$length</span><span class="p">;</span>
<span class="sd">/** @Field */</span>
<span class="k">private</span> <span class="nv">$chunkSize</span><span class="p">;</span>
<span class="sd">/** @Field */</span>
<span class="k">private</span> <span class="nv">$md5</span><span class="p">;</span>
<span class="k">public</span> <span class="k">function</span> <span class="nf">getId</span><span class="p">()</span>
<span class="p">{</span>
<span class="k">return</span> <span class="nv">$this</span><span class="o">-&gt;</span><span class="na">id</span><span class="p">;</span>
<span class="p">}</span>
<span class="k">public</span> <span class="k">function</span> <span class="nf">setName</span><span class="p">(</span><span class="nv">$name</span><span class="p">)</span>
<span class="p">{</span>
<span class="nv">$this</span><span class="o">-&gt;</span><span class="na">name</span> <span class="o">=</span> <span class="nv">$name</span><span class="p">;</span>
<span class="p">}</span>
<span class="k">public</span> <span class="k">function</span> <span class="nf">getName</span><span class="p">()</span>
<span class="p">{</span>
<span class="k">return</span> <span class="nv">$this</span><span class="o">-&gt;</span><span class="na">name</span><span class="p">;</span>
<span class="p">}</span>
<span class="k">public</span> <span class="k">function</span> <span class="nf">getFile</span><span class="p">()</span>
<span class="p">{</span>
<span class="k">return</span> <span class="nv">$this</span><span class="o">-&gt;</span><span class="na">file</span><span class="p">;</span>
<span class="p">}</span>
<span class="k">public</span> <span class="k">function</span> <span class="nf">setFile</span><span class="p">(</span><span class="nv">$file</span><span class="p">)</span>
<span class="p">{</span>
<span class="nv">$this</span><span class="o">-&gt;</span><span class="na">file</span> <span class="o">=</span> <span class="nv">$file</span><span class="p">;</span>
<span class="p">}</span>
<span class="p">}</span>
</pre></div>
</div>
<p>Notice how we annotated the $file property with &#64;File. This is what
tells the Document that it is to be stored using the MongoGridFS
and the MongoGridFSFile instance is placed in the $file property
for you to access the actual file itself.</p>
<p>The $uploadDate, $chunkSize and $md5 properties are automatically filled in
for each file stored in GridFS (whether you like that or not).
Feel free to create getters in your document to actually make use of them,
but keep in mind that their values will be initially unset for new objects
until the next time the document is hydrated (fetched from the database).</p>
<p>First you need to create a new Image:</p>
<div class="highlight-php"><div class="highlight"><pre><span class="cp">&lt;?php</span>
<span class="nv">$image</span> <span class="o">=</span> <span class="k">new</span> <span class="nx">Image</span><span class="p">();</span>
<span class="nv">$image</span><span class="o">-&gt;</span><span class="na">setName</span><span class="p">(</span><span class="s1">&#39;Test image&#39;</span><span class="p">);</span>
<span class="nv">$image</span><span class="o">-&gt;</span><span class="na">setFile</span><span class="p">(</span><span class="s1">&#39;/path/to/image.png&#39;</span><span class="p">);</span>
<span class="nv">$dm</span><span class="o">-&gt;</span><span class="na">persist</span><span class="p">(</span><span class="nv">$image</span><span class="p">);</span>
<span class="nv">$dm</span><span class="o">-&gt;</span><span class="na">flush</span><span class="p">();</span>
</pre></div>
</div>
<p>Now you can later query for the Image and render it:</p>
<div class="highlight-php"><div class="highlight"><pre><span class="cp">&lt;?php</span>
<span class="nv">$image</span> <span class="o">=</span> <span class="nv">$dm</span><span class="o">-&gt;</span><span class="na">createQueryBuilder</span><span class="p">(</span><span class="s1">&#39;Documents\Image&#39;</span><span class="p">)</span>
<span class="o">-&gt;</span><span class="na">field</span><span class="p">(</span><span class="s1">&#39;name&#39;</span><span class="p">)</span><span class="o">-&gt;</span><span class="na">equals</span><span class="p">(</span><span class="s1">&#39;Test image&#39;</span><span class="p">)</span>
<span class="o">-&gt;</span><span class="na">getQuery</span><span class="p">()</span>
<span class="o">-&gt;</span><span class="na">getSingleResult</span><span class="p">();</span>
<span class="nb">header</span><span class="p">(</span><span class="s1">&#39;Content-type: image/png;&#39;</span><span class="p">);</span>
<span class="k">echo</span> <span class="nv">$image</span><span class="o">-&gt;</span><span class="na">getFile</span><span class="p">()</span><span class="o">-&gt;</span><span class="na">getBytes</span><span class="p">();</span>
</pre></div>
</div>
<p>You can of course make references to this Image document from
another document. Imagine you had a Profile document and you wanted
every Profile to have a profile image:</p>
<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 */</span>
<span class="k">class</span> <span class="nc">Profile</span>
<span class="p">{</span>
<span class="sd">/** @Id */</span>
<span class="k">private</span> <span class="nv">$id</span><span class="p">;</span>
<span class="sd">/** @Field */</span>
<span class="k">private</span> <span class="nv">$name</span><span class="p">;</span>
<span class="sd">/** @ReferenceOne(targetDocument=&quot;Documents\Image&quot;) */</span>
<span class="k">private</span> <span class="nv">$image</span><span class="p">;</span>
<span class="k">public</span> <span class="k">function</span> <span class="nf">getId</span><span class="p">()</span>
<span class="p">{</span>
<span class="k">return</span> <span class="nv">$this</span><span class="o">-&gt;</span><span class="na">id</span><span class="p">;</span>
<span class="p">}</span>
<span class="k">public</span> <span class="k">function</span> <span class="nf">getName</span><span class="p">()</span>
<span class="p">{</span>
<span class="k">return</span> <span class="nv">$this</span><span class="o">-&gt;</span><span class="na">name</span><span class="p">;</span>
<span class="p">}</span>
<span class="k">public</span> <span class="k">function</span> <span class="nf">setName</span><span class="p">(</span><span class="nv">$name</span><span class="p">)</span>
<span class="p">{</span>
<span class="nv">$this</span><span class="o">-&gt;</span><span class="na">name</span> <span class="o">=</span> <span class="nv">$name</span><span class="p">;</span>
<span class="p">}</span>
<span class="k">public</span> <span class="k">function</span> <span class="nf">getImage</span><span class="p">()</span>
<span class="p">{</span>
<span class="k">return</span> <span class="nv">$this</span><span class="o">-&gt;</span><span class="na">image</span><span class="p">;</span>
<span class="p">}</span>
<span class="k">public</span> <span class="k">function</span> <span class="nf">setImage</span><span class="p">(</span><span class="nx">Image</span> <span class="nv">$image</span><span class="p">)</span>
<span class="p">{</span>
<span class="nv">$this</span><span class="o">-&gt;</span><span class="na">image</span> <span class="o">=</span> <span class="nv">$image</span><span class="p">;</span>
<span class="p">}</span>
<span class="p">}</span>
</pre></div>
</div>
<p>Now you can create a new Profile and give it an Image:</p>
<div class="highlight-php"><div class="highlight"><pre><span class="cp">&lt;?php</span>
<span class="nv">$image</span> <span class="o">=</span> <span class="k">new</span> <span class="nx">Image</span><span class="p">();</span>
<span class="nv">$image</span><span class="o">-&gt;</span><span class="na">setName</span><span class="p">(</span><span class="s1">&#39;Test image&#39;</span><span class="p">);</span>
<span class="nv">$image</span><span class="o">-&gt;</span><span class="na">setFile</span><span class="p">(</span><span class="s1">&#39;/path/to/image.png&#39;</span><span class="p">);</span>
<span class="nv">$profile</span> <span class="o">=</span> <span class="k">new</span> <span class="nx">Profile</span><span class="p">();</span>
<span class="nv">$profile</span><span class="o">-&gt;</span><span class="na">setName</span><span class="p">(</span><span class="s1">&#39;Jonathan H. Wage&#39;</span><span class="p">);</span>
<span class="nv">$profile</span><span class="o">-&gt;</span><span class="na">setImage</span><span class="p">(</span><span class="nv">$image</span><span class="p">);</span>
<span class="nv">$dm</span><span class="o">-&gt;</span><span class="na">persist</span><span class="p">(</span><span class="nv">$profile</span><span class="p">);</span>
<span class="nv">$dm</span><span class="o">-&gt;</span><span class="na">flush</span><span class="p">();</span>
</pre></div>
</div>
<p>If you want to query for the Profile and load the Image reference
in a query you can use:</p>
<div class="highlight-php"><div class="highlight"><pre><span class="cp">&lt;?php</span>
<span class="nv">$profile</span> <span class="o">=</span> <span class="nv">$dm</span><span class="o">-&gt;</span><span class="na">createQueryBuilder</span><span class="p">(</span><span class="s1">&#39;Profile&#39;</span><span class="p">)</span>
<span class="o">-&gt;</span><span class="na">field</span><span class="p">(</span><span class="s1">&#39;name&#39;</span><span class="p">)</span><span class="o">-&gt;</span><span class="na">equals</span><span class="p">(</span><span class="s1">&#39;Jonathan H. Wage&#39;</span><span class="p">)</span>
<span class="o">-&gt;</span><span class="na">getQuery</span><span class="p">()</span>
<span class="o">-&gt;</span><span class="na">getSingleResult</span><span class="p">();</span>
<span class="nv">$image</span> <span class="o">=</span> <span class="nv">$profile</span><span class="o">-&gt;</span><span class="na">getImage</span><span class="p">();</span>
<span class="nb">header</span><span class="p">(</span><span class="s1">&#39;Content-type: image/png;&#39;</span><span class="p">);</span>
<span class="k">echo</span> <span class="nv">$image</span><span class="o">-&gt;</span><span class="na">getFile</span><span class="p">()</span><span class="o">-&gt;</span><span class="na">getBytes</span><span class="p">();</span>
</pre></div>
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