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    <!-- End community_header --> </div><div class="spacer56"></div><div class="fill-koromiko p-mini text-center text-bold color-bunting">This plugin is deprecated and no longer maintained by Algolia.</div><section class="documentation-section"><div class="container relative"><nav class="sidebar z-100 sidebar_fixed"><div class="sidebar-container"><h2 class="sidebar-header text-bold">Essentials</h2><ul class="sidebar-elements"><li class="sidebar-element"><a href="getting-started.html">Getting Started</a></li><li class="sidebar-element"><a href="how-it-works.html">How it works</a></li><li class="sidebar-element"><a href="faq.html">FAQ</a></li></ul><h2 class="sidebar-header text-bold">Configuration</h2><ul class="sidebar-elements"><li class="sidebar-element"><a href="options.html">Options</a></li><li class="sidebar-element"><a href="commandline.html">Commandline</a></li><li class="sidebar-element"><a class="sidebar-element_active" href="hooks.html">Hooks</a><ul><li class="sidebar-element"><a href="hooks.html#should-be-excluded">should_be_excluded? </a></li><li class="sidebar-element"><a href="hooks.html#before-indexing-each">before_indexing_each </a></li><li class="sidebar-element"><a href="hooks.html#before-indexing-all">before_indexing_all </a></li></ul></li></ul><h2 class="sidebar-header text-bold">Advanced</h2><ul class="sidebar-elements"><li class="sidebar-element"><a href="netlify.html">Deploying on Netlify</a></li><li class="sidebar-element"><a href="github-pages.html">Deploying on Github Pages</a></li><li class="sidebar-element"><a href="themes.html">Themes</a></li><li class="sidebar-element"><a href="migration-guide.html">Migration guide</a></li></ul><h2 class="sidebar-header text-bold">Tutorials</h2><ul class="sidebar-elements"><li class="sidebar-element"><a href="blog.html">Blog</a></li></ul></div></nav><a class="sidebar-opener"></a><div class="documentation-container"><h1 id="hooks">Hooks <a class="anchor" href="hooks.html#hooks" aria-hidden="true"></a></h1>
<p>The plugin gives you access to hooks in its lifecycle. Those hooks can
be used to add your own custom Ruby logic to have more control on the way
records are being extracted and indexed.</p>
<p>Using hooks are a more advanced feature than using <a href="./options.html">regular configuration</a> options
but they will also give you much more flexibility.</p>
<h3 id="usage">Usage <a class="anchor" href="hooks.html#usage" aria-hidden="true"></a></h3>
<p>You’ll have to extend the <code>Jekyll::Algolia::Hooks</code> class to overwrite the method
definition of the hooks. The best way to do so is to <a href="https://jekyllrb.com/docs/plugins/#installing-a-plugin">add a custom plugin</a> to
your Jekyll site.</p>
<p>Create a <code>_plugins</code> directory in your Jekyll source folder if you don’t have one
already. Inside this folder, create an <code>algolia_hooks.rb</code> file.</p>
<p>The file should have the following structure:</p>
<pre class="code-sample cm-s-mdn-like codeMirror ruby" data-code-type="Code"><div class="code-wrap"><code><span class="cm-keyword">module</span> <span class="cm-tag">Jekyll</span>
  <span class="cm-keyword">module</span> <span class="cm-tag">Algolia</span>
    <span class="cm-keyword">module</span> <span class="cm-tag">Hooks</span>
      <span class="cm-comment"># Add your hooks here</span>
    <span class="cm-keyword">end</span>
  <span class="cm-keyword">end</span>
<span class="cm-keyword">end</span>
</code></div></pre>
<h2 id="should-be-excluded"><code>should_be_excluded?</code> <a class="anchor" href="hooks.html#should-be-excluded" aria-hidden="true"></a></h2>
<p>This hook will give you more control on which file should be indexed or not. It
will be called for every indexable file, with the source <code>filepath</code> as an
argument. The file will be excluded if the hook returns <code>true</code>, and will be
indexed if it returns <code>false</code>.</p>
<table>
<thead>
<tr>
<th>Key</th>
<th>Value</th>
</tr>
</thead>
<tbody>
<tr>
<td>Signature</td>
<td><code>should_be_excluded?(filepath)</code></td>
</tr>
<tr>
<td>Arguments</td>
<td><ul><li><code>filepath</code>: The source path of the file</li></ul></td>
</tr>
<tr>
<td>Expected returns</td>
<td><ul><li><code>true</code> if the file should be excluded</li><li><code>false</code> if it should be indexed</li></ul></td>
</tr>
</tbody>
</table>
<p><em>Note that the hook will not be called on files already excluded by
<a href="./options.html#extensions-to-index">extensions_to_index</a> or <a href="./options.html#files-to-exclude">files_to_exclude</a>.</em></p>
<h3 id="example">Example <a class="anchor" href="hooks.html#example" aria-hidden="true"></a></h3>
<pre class="code-sample cm-s-mdn-like codeMirror ruby" data-code-type="Code"><div class="code-wrap"><code><span class="cm-keyword">module</span> <span class="cm-tag">Jekyll</span>
  <span class="cm-keyword">module</span> <span class="cm-tag">Algolia</span>
    <span class="cm-keyword">module</span> <span class="cm-tag">Hooks</span>
      <span class="cm-keyword">def</span> <span class="cm-keyword">self</span><span class="cm-operator">.</span><span class="cm-property">should_be_excluded?</span>(<span class="cm-variable">filepath</span>)
        <span class="cm-comment"># Do not index blog posts from 2015</span>
        <span class="cm-keyword">return</span> <span class="cm-keyword">true</span> <span class="cm-keyword">if</span> <span class="cm-variable">filepath</span> <span class="cm-operator">=~</span> <span class="cm-string-2">%r{_posts/2015-}</span>
        <span class="cm-keyword">false</span>
      <span class="cm-keyword">end</span>
    <span class="cm-keyword">end</span>
  <span class="cm-keyword">end</span>
<span class="cm-keyword">end</span>
</code></div></pre>
<h2 id="before-indexing-each"><code>before_indexing_each</code> <a class="anchor" href="hooks.html#before-indexing-each" aria-hidden="true"></a></h2>
<p>This hook will be called on every single record before indexing them. It gives
you a way to edit the record before pushing it. You can use this hook to add,
edit or delete keys from the record. If the hook returns <code>nil</code>, the record will
not be indexed.</p>
<p>The hook will receive three arguments: <code>record</code>, <code>node</code> and <code>context</code>. <code>record</code>
is the hash of the record, ready to be pushed to Algolia. <code>node</code> is
a <a href="http://www.nokogiri.org">Nokogiri</a> representation of the HTML node the record was extracted from
(as specified in <a href="./options.html#nodes-to-index">nodes_to_index</a>). <code>context</code> gives more information about
the whole indexing process (check the following table for more details).</p>
<table>
<thead>
<tr>
<th>Key</th>
<th>Value</th>
</tr>
</thead>
<tbody>
<tr>
<td>Signature</td>
<td><code>before_indexing_each(record, node, context)</code></td>
</tr>
<tr>
<td>Arguments</td>
<td><ul><li><code>record</code>: A hash of the record that will be pushed</li><li><code>node</code>: A <a href="https://github.com/sparklemotion/nokogiri/wiki/Cheat-sheet">Nokogiri</a> representation of the HTML node used to extract the content</li><li><code>context</code>: More information about the whole website. <ul><li><code>context.data</code>: Any data defined in the <code>_data</code> folder</li><li><code>context.config</code>: Settings defined in  <code>_config.yml</code></li><li><code>data.collections</code>: Custom collections and posts</li></ul></li></ul></td>
</tr>
<tr>
<td>Expected returns</td>
<td><ul><li>A hash of the record to be indexed</li><li><code>nil</code> if the record should not be indexed</li></ul></td>
</tr>
</tbody>
</table>
<h3 id="example-2">Example <a class="anchor" href="hooks.html#example-2" aria-hidden="true"></a></h3>
<pre class="code-sample cm-s-mdn-like codeMirror ruby" data-code-type="Code"><div class="code-wrap"><code><span class="cm-keyword">module</span> <span class="cm-tag">Jekyll</span>
  <span class="cm-keyword">module</span> <span class="cm-tag">Algolia</span>
    <span class="cm-keyword">module</span> <span class="cm-tag">Hooks</span>
      <span class="cm-keyword">def</span> <span class="cm-keyword">self</span><span class="cm-operator">.</span><span class="cm-property">before_indexing_each</span>(<span class="cm-variable">record</span>, <span class="cm-variable">node</span>, <span class="cm-variable">context</span>)
        <span class="cm-comment"># Do not index deprecation warnings</span>
        <span class="cm-keyword">return</span> <span class="cm-keyword">nil</span> <span class="cm-keyword">if</span> <span class="cm-variable">node</span><span class="cm-operator">.</span><span class="cm-property">matches?</span>(<span class="cm-string">&#39;.deprecation-notice&#39;</span>)
        <span class="cm-comment"># Add my name as an author to each record</span>
        <span class="cm-variable">record</span>[<span class="cm-atom">:author</span>] <span class="cm-operator">=</span> <span class="cm-string">&#39;Myself&#39;</span>

        <span class="cm-variable">record</span>
      <span class="cm-keyword">end</span>
    <span class="cm-keyword">end</span>
  <span class="cm-keyword">end</span>
<span class="cm-keyword">end</span>
</code></div></pre>
<h2 id="before-indexing-all"><code>before_indexing_all</code> <a class="anchor" href="hooks.html#before-indexing-all" aria-hidden="true"></a></h2>
<p>This hook is similar to <a href="hooks.html#hook-before-indexing-each">before_index_each</a>, but instead of being called
on every record, it is called only once, on the full list of record, right
before pushing them.</p>
<p>It will be called with two arguments: <code>records</code> will be the full list of records
to be pushed, and <code>context</code> will contain more information about the current
indexing (check the following table for more details). The method expects a list
of records to be returned.</p>
<p>You can use this hook to add, edit or delete complete records from the list,
knowing the full context of what is going to be pushed.</p>
<table>
<thead>
<tr>
<th>Key</th>
<th>Value</th>
</tr>
</thead>
<tbody>
<tr>
<td>Signature</td>
<td><code>before_indexing_all(records, context)</code></td>
</tr>
<tr>
<td>Arguments</td>
<td><ul><li><code>records</code>: An array of hashes representing the records that are going to be pushed</li><li><code>context</code>: More information about the whole website. <ul><li><code>context.data</code>: Any data defined in the <code>_data</code> folder</li><li><code>context.config</code>: Settings defined in  <code>_config.yml</code></li><li><code>data.collections</code>: Custom collections and posts</li></ul></li></ul></td>
</tr>
<tr>
<td>Expected returns</td>
<td><ul><li>An array of hashes to be pushed as records</li></ul></td>
</tr>
</tbody>
</table>
<h3 id="example-3">Example <a class="anchor" href="hooks.html#example-3" aria-hidden="true"></a></h3>
<pre class="code-sample cm-s-mdn-like codeMirror ruby" data-code-type="Code"><div class="code-wrap"><code><span class="cm-keyword">module</span> <span class="cm-tag">Jekyll</span>
  <span class="cm-keyword">module</span> <span class="cm-tag">Algolia</span>
    <span class="cm-keyword">module</span> <span class="cm-tag">Hooks</span>
      <span class="cm-keyword">def</span> <span class="cm-keyword">self</span><span class="cm-operator">.</span><span class="cm-property">before_indexing_all</span>(<span class="cm-variable">records</span>, <span class="cm-variable">context</span>)
        <span class="cm-comment"># Add a tags array to each record</span>
        <span class="cm-variable">records</span><span class="cm-operator">.</span><span class="cm-property">each</span> <span class="cm-keyword">do</span> |<span class="cm-def">record</span>|
          <span class="cm-variable">record</span>[<span class="cm-atom">:tags</span>] <span class="cm-operator">=</span> []
          <span class="cm-comment"># Add &#39;blog&#39; as a tag if it&#39;s a post</span>
          <span class="cm-variable">record</span>[<span class="cm-atom">:tags</span>] <span class="cm-operator">&lt;&lt;</span> <span class="cm-string">&#39;blog&#39;</span> <span class="cm-keyword">if</span> <span class="cm-variable">record</span>[<span class="cm-atom">:type</span>] <span class="cm-operator">==</span> <span class="cm-string">&#39;post&#39;</span>
          <span class="cm-comment"># Add js as a tag if it&#39;s about javascript</span>
          <span class="cm-variable">record</span>[<span class="cm-atom">:tags</span>] <span class="cm-operator">&lt;&lt;</span> <span class="cm-string">&#39;js&#39;</span> <span class="cm-keyword">if</span> <span class="cm-variable">record</span>[<span class="cm-atom">:title</span>]<span class="cm-operator">.</span><span class="cm-property">include?</span>(<span class="cm-string">&#39;js&#39;</span>)
        <span class="cm-keyword">end</span>

        <span class="cm-variable">records</span>
      <span class="cm-keyword">end</span>
    <span class="cm-keyword">end</span>
  <span class="cm-keyword">end</span>
<span class="cm-keyword">end</span>
</code></div></pre>
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