title: How to set the default value for float in sqlalchemy?
body: <p>Using Flask-SQLAlchemy. I wish to set a default value for a property on a model:</p>
  
  <pre><code>priority = sa.Column(sa.Float, server_default='0.5')
  </code></pre>
  
  <p>But it does not get set in table:</p>
  
  <pre><code>priority double precision,
  </code></pre>