title: OctoberCMS: How to prevent a form filed from being saved into database?
body: <p>I've got a form fields definition file like the following:</p>
  
  <pre><code>fields:
      pivot[hall]:
          label: Hall
          type: text
          span: auto
  
      pivot[booth]:
          label: Booth
          type: text
          span: auto
  
      booth_picker:
          label: Select Booth
          type: boothpicker
          span: full
  </code></pre>
  
  <p>The third field is only a form widget which provides a convenient visual way to set the value of <code>booth</code> field. Therefore, I do not need the <code>booth_picker</code> field to be submitted and saved into database because there is no such field in the table. Only <code>hall</code> and <code>booth</code> need to be submitted and saved. I am currently getting this error:</p>
  
  <blockquote>
    <p>SQLSTATE[42S22]: Column not found: 1054 Unknown column 'booth_picker'
    in 'field list' (SQL: update <code>users</code> set <code>updated_at</code> = 2016-12-15
    13:14:44, <code>booth_picker</code> = where <code>id</code> = 37)"</p>
  </blockquote>
  
  <p>How can I prevent this helper field from being submitted? Or maybe there is a way of removing this field before the model is saved into database?</p>