title: Symfony 3.4: How can I get full country name in twig
body: <pre><code>$builder-&gt;add('nationality', CountryType::class, array('preferred_choices' =&gt; array('ET'),'required' =&gt; true,'attr' =&gt; array('style' =&gt; 'width:300px')))
  </code></pre>
  
  <p>It display the full name in the combobox, but it saves the initials (FR for FRANCE, UG for Uganda, ET for Ethiopia etc..)</p>
  
  <p>The following is the source code of the page and it shows that the values are the initials.</p>
  
  <pre><code>&lt;/div&gt;&lt;option value="AF"&gt;Afghanistan&lt;/option&gt;&lt;option value="AL"&gt;Albania&lt;/option&gt;&lt;option value="DZ"&gt;Algeria&lt;/option&gt;&lt;option value="AS"&gt;American Samoa&lt;/option&gt;&lt;option value="AD"&gt;Andorra&lt;/option&gt;&lt;option value="AO"&gt;Angola&lt;/option&gt;&lt;option value="AI"&gt;Anguilla&lt;/option&gt;&lt;option value="AQ"&gt;Antarctica&lt;/option&gt;&lt;option value="AG"&gt;Antigua &amp;amp; Barbuda&lt;/option&gt;&lt;option value="AR"&gt;Argentina&lt;/option&gt;&lt;option value="AM"&gt;Armenia&lt;/option&gt;&lt;option value="AW"&gt;Aruba&lt;/option&gt;
  </code></pre>
  
  <p>When I read from the database {{ student.nationality }}, I get the initials </p>
  
  <p>How can I make the CountryType class saves the full name of the counties?</p>