title: magento adding custom column to eav_attribute table
body: <p>I want adding my custom field(column in database) to table <code>eav_attribute</code>
  this is my configuration models and resource in t</p>
  
  <pre><code> &lt;models&gt;
      &lt;mycompany_filters&gt;
          &lt;class&gt;Mycompany_Filters_Model&lt;/class&gt;
          &lt;resourceModel&gt;mycompany_filters_resource&lt;/resourceModel&gt;
      &lt;/mycompany_filters&gt;
      &lt;mycompany_filters_resource&gt;
          &lt;class&gt;Mycompany_Filters_Model_Resource&lt;/class&gt;
      &lt;/mycompany_filters_resource&gt;
  &lt;/models&gt;
  &lt;resources&gt;
      &lt;mycompany_filters_setup&gt;
          &lt;module&gt;Mage_Eav&lt;/module&gt;
          &lt;module&gt;Mage_Eav_Model_Entity_Setup&lt;/module&gt;
      &lt;/mycompany_filters_setup&gt;
  &lt;/resources&gt;
  </code></pre>
  
  <p>directory tree </p>
  
  <hr>
  
  <pre><code>sql
   -- mycompany_filters_setup
    -- install-0.1.4.php
  </code></pre>
  
  <p>and content file install-0.1.4.php</p>
  
  <hr>
  
  <pre><code>&lt;?php
  
  $installer = $this;
  /* @var $installer Mage_Eav_Model_Entity_Setup */
  
  $installer-&gt;startSetup();
  
  $installer-&gt;getConnection()-&gt;addColumn(
      $installer-&gt;getTable('eav/attribute'), 
      "is_used_in_category", 
      "TINYINT( 1 ) UNSIGNED NOT NULL DEFAULT '0'"
  );
  
  $installer-&gt;endSetup();
  </code></pre>
  
  <p>but this doesn't work. In table <code>core_resource</code> not create string resource for <code>mycompany_filters</code> and in table <code>eav_attribute</code> don't created new column. </p>
  
  <p>Error logs: system.log and exception.log apache2 log is empty</p>
  
  <p>Main question why is doesn't work? </p>