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  <div class="section" id="database-seeding">
<h1>Database Seeding<a class="headerlink" href="#database-seeding" title="Permalink to this headline">¶</a></h1>
<p>Database seeding is a simple way to add data into your database. It is especially useful during development where
you need to populate the database with sample data that you can develop against, but it is not limited to that.
Seeds can contain static data that you don’t want to include in a migration, like countries, or geo-coding tables,
event or setting information, and more.</p>
<p>Database seeds are simple classes that must have a <strong>run()</strong> method, and extend <code class="docutils literal notranslate"><span class="pre">CodeIgniter\Database\Seeder</span></code>.
Within the <strong>run()</strong> the class can create any form of data that it needs to. It has access to the database
connection and the forge through <code class="docutils literal notranslate"><span class="pre">$this-&gt;db</span></code> and <code class="docutils literal notranslate"><span class="pre">$this-&gt;forge</span></code>, respectively. Seed files must be
stored within the <strong>app/Database/Seeds</strong> directory. The name of the file must match the name of the class.</p>
<div class="highlight-html+php notranslate"><div class="highlight"><pre><span></span><span class="o">&lt;?</span><span class="nx">php</span>

<span class="k">namespace</span> <span class="nx">App\Database\Seeds</span><span class="p">;</span>

<span class="k">use</span> <span class="nx">CodeIgniter\Database\Seeder</span><span class="p">;</span>

<span class="k">class</span> <span class="nc">SimpleSeeder</span> <span class="k">extends</span> <span class="nx">Seeder</span>
<span class="p">{</span>
        <span class="k">public</span> <span class="k">function</span> <span class="nf">run</span><span class="p">()</span>
        <span class="p">{</span>
                <span class="nv">$data</span> <span class="o">=</span> <span class="p">[</span>
                        <span class="s1">&#39;username&#39;</span> <span class="o">=&gt;</span> <span class="s1">&#39;darth&#39;</span><span class="p">,</span>
                        <span class="s1">&#39;email&#39;</span>    <span class="o">=&gt;</span> <span class="s1">&#39;darth@theempire.com&#39;</span>
                <span class="p">];</span>

                <span class="c1">// Simple Queries</span>
                <span class="nv">$this</span><span class="o">-&gt;</span><span class="na">db</span><span class="o">-&gt;</span><span class="na">query</span><span class="p">(</span><span class="s2">&quot;INSERT INTO users (username, email) VALUES(:username:, :email:)&quot;</span><span class="p">,</span> <span class="nv">$data</span><span class="p">);</span>

                <span class="c1">// Using Query Builder</span>
                <span class="nv">$this</span><span class="o">-&gt;</span><span class="na">db</span><span class="o">-&gt;</span><span class="na">table</span><span class="p">(</span><span class="s1">&#39;users&#39;</span><span class="p">)</span><span class="o">-&gt;</span><span class="na">insert</span><span class="p">(</span><span class="nv">$data</span><span class="p">);</span>
        <span class="p">}</span>
<span class="p">}</span>
</pre></div>
</div>
<div class="section" id="nesting-seeders">
<h2>Nesting Seeders<a class="headerlink" href="#nesting-seeders" title="Permalink to this headline">¶</a></h2>
<p>Seeders can call other seeders, with the <strong>call()</strong> method. This allows you to easily organize a central seeder,
but organize the tasks into separate seeder files:</p>
<div class="highlight-html+php notranslate"><div class="highlight"><pre><span></span><span class="o">&lt;?</span><span class="nx">php</span>

<span class="k">namespace</span> <span class="nx">App\Database\Seeds</span><span class="p">;</span>

<span class="k">use</span> <span class="nx">CodeIgniter\Database\Seeder</span><span class="p">;</span>

<span class="k">class</span> <span class="nc">TestSeeder</span> <span class="k">extends</span> <span class="nx">Seeder</span>
<span class="p">{</span>
        <span class="k">public</span> <span class="k">function</span> <span class="nf">run</span><span class="p">()</span>
        <span class="p">{</span>
                <span class="nv">$this</span><span class="o">-&gt;</span><span class="na">call</span><span class="p">(</span><span class="s1">&#39;UserSeeder&#39;</span><span class="p">);</span>
                <span class="nv">$this</span><span class="o">-&gt;</span><span class="na">call</span><span class="p">(</span><span class="s1">&#39;CountrySeeder&#39;</span><span class="p">);</span>
                <span class="nv">$this</span><span class="o">-&gt;</span><span class="na">call</span><span class="p">(</span><span class="s1">&#39;JobSeeder&#39;</span><span class="p">);</span>
        <span class="p">}</span>
<span class="p">}</span>
</pre></div>
</div>
<p>You can also use a fully-qualified class name in the <strong>call()</strong> method, allowing you to keep your seeders
anywhere the autoloader can find them. This is great for more modular code bases:</p>
<div class="highlight-html+php notranslate"><div class="highlight"><pre><span></span><span class="k">public</span> <span class="k">function</span> <span class="nf">run</span><span class="p">()</span>
<span class="p">{</span>
        <span class="nv">$this</span><span class="o">-&gt;</span><span class="na">call</span><span class="p">(</span><span class="s1">&#39;UserSeeder&#39;</span><span class="p">);</span>
        <span class="nv">$this</span><span class="o">-&gt;</span><span class="na">call</span><span class="p">(</span><span class="s1">&#39;My\Database\Seeds\CountrySeeder&#39;</span><span class="p">);</span>
<span class="p">}</span>
</pre></div>
</div>
</div>
<div class="section" id="using-faker">
<h2>Using Faker<a class="headerlink" href="#using-faker" title="Permalink to this headline">¶</a></h2>
<p>If you want to automate the generation of seed data, you can use
the <a class="reference external" href="https://github.com/fakerphp/faker">Faker library</a>.</p>
<p>To install Faker into your project:</p>
<div class="highlight-html+php notranslate"><div class="highlight"><pre><span></span><span class="o">&gt;</span> <span class="nx">composer</span> <span class="k">require</span> <span class="o">--</span><span class="nx">dev</span> <span class="nx">fakerphp</span><span class="o">/</span><span class="nx">faker</span>
</pre></div>
</div>
<p>After installation, an instance of <code class="docutils literal notranslate"><span class="pre">Faker\Generator</span></code> is available in the main <code class="docutils literal notranslate"><span class="pre">Seeder</span></code>
class and is accessible by all child seeders. You must use the static method <code class="docutils literal notranslate"><span class="pre">faker()</span></code>
to access the instance.</p>
<div class="highlight-html+php notranslate"><div class="highlight"><pre><span></span><span class="o">&lt;?</span><span class="nx">php</span>

<span class="k">namespace</span> <span class="nx">App\Database\Seeds</span><span class="p">;</span>

<span class="k">use</span> <span class="nx">CodeIgniter\Database\Seeder</span><span class="p">;</span>

<span class="k">class</span> <span class="nc">UserSeeder</span> <span class="k">extends</span> <span class="nx">Seeder</span>
<span class="p">{</span>
        <span class="k">public</span> <span class="k">function</span> <span class="nf">run</span><span class="p">()</span>
        <span class="p">{</span>
                <span class="nv">$model</span> <span class="o">=</span> <span class="nx">model</span><span class="p">(</span><span class="s1">&#39;UserModel&#39;</span><span class="p">);</span>

                <span class="nv">$model</span><span class="o">-&gt;</span><span class="na">insert</span><span class="p">([</span>
                        <span class="s1">&#39;email&#39;</span>      <span class="o">=&gt;</span> <span class="k">static</span><span class="o">::</span><span class="na">faker</span><span class="p">()</span><span class="o">-&gt;</span><span class="na">email</span><span class="p">,</span>
                        <span class="s1">&#39;ip_address&#39;</span> <span class="o">=&gt;</span> <span class="k">static</span><span class="o">::</span><span class="na">faker</span><span class="p">()</span><span class="o">-&gt;</span><span class="na">ipv4</span><span class="p">,</span>
                <span class="p">]);</span>
        <span class="p">}</span>
<span class="p">}</span>
</pre></div>
</div>
</div>
<div class="section" id="using-seeders">
<h2>Using Seeders<a class="headerlink" href="#using-seeders" title="Permalink to this headline">¶</a></h2>
<p>You can grab a copy of the main seeder through the database config class:</p>
<div class="highlight-html+php notranslate"><div class="highlight"><pre><span></span><span class="nv">$seeder</span> <span class="o">=</span> <span class="nx">\Config\Database</span><span class="o">::</span><span class="na">seeder</span><span class="p">();</span>
<span class="nv">$seeder</span><span class="o">-&gt;</span><span class="na">call</span><span class="p">(</span><span class="s1">&#39;TestSeeder&#39;</span><span class="p">);</span>
</pre></div>
</div>
<div class="section" id="command-line-seeding">
<h3>Command Line Seeding<a class="headerlink" href="#command-line-seeding" title="Permalink to this headline">¶</a></h3>
<p>You can also seed data from the command line, as part of the Migrations CLI tools, if you don’t want to create
a dedicated controller:</p>
<div class="highlight-html+php notranslate"><div class="highlight"><pre><span></span><span class="o">&gt;</span> <span class="nx">php</span> <span class="nx">spark</span> <span class="nx">db</span><span class="o">:</span><span class="nx">seed</span> <span class="nx">TestSeeder</span>
</pre></div>
</div>
</div>
<div class="section" id="creating-seed-files">
<h3>Creating Seed Files<a class="headerlink" href="#creating-seed-files" title="Permalink to this headline">¶</a></h3>
<p>Using the command line, you can easily generate seed files.</p>
<div class="highlight-html+php notranslate"><div class="highlight"><pre><span></span><span class="c1">// This command will create a UserSeeder seed file</span>
<span class="c1">// located at app/Database/Seeds/ directory.</span>
<span class="o">&gt;</span> <span class="nx">php</span> <span class="nx">spark</span> <span class="nx">make</span><span class="o">:</span><span class="nx">seeder</span> <span class="nx">UserSeeder</span>
</pre></div>
</div>
<p>You can supply the <strong>root</strong> namespace where the seed file will be stored by supplying the <code class="docutils literal notranslate"><span class="pre">-n</span></code> option:</p>
<div class="highlight-html+php notranslate"><div class="highlight"><pre><span></span><span class="o">&gt;</span> <span class="nx">php</span> <span class="nx">spark</span> <span class="nx">make</span><span class="o">:</span><span class="nx">seeder</span> <span class="nx">MySeeder</span> <span class="o">-</span><span class="nx">n</span> <span class="nx">Acme\Blog</span>
</pre></div>
</div>
<p>If <code class="docutils literal notranslate"><span class="pre">Acme\Blog</span></code> is mapped to <code class="docutils literal notranslate"><span class="pre">app/Blog</span></code> directory, then this command will save the
seed file to <code class="docutils literal notranslate"><span class="pre">app/Blog/Database/Seeds/</span></code>.</p>
<p>Supplying the <code class="docutils literal notranslate"><span class="pre">--force</span></code> option will overwrite existing files in destination.</p>
</div>
</div>
</div>


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