title: How do I use Flask Migrate to create a SIMILAR TO constraint?
body: <p>I would like to build a constraint on status, using flask migrate. Status does not yet exist. </p>
  
  <p>my model includes this line:</p>
  
  <pre><code>status = db.Column(db.String(120), unique=False)
  </code></pre>
  
  <p>I would like to add the following constraint on status in addition to create status:</p>
  
  <pre><code>ALTER TABLE inventory ADD CONSTRAINT "StatusCheck" CHECK ("status" SIMILAR TO 'Ordered|Received|Ready|Faulty|Void');
  </code></pre>