title: sqlalchemy Move mixin columns to end
body: <p>I have a sqlalchemy model, where all most all tables/objects have a notes field. So to try follow the DRY principle, I moved the field to a mixin class. </p>
  
  <pre><code>class NotesMixin(object):
      notes = sa.Column(sa.String(4000) , nullable=False, default='')
  
  class Service(Base, NotesMixin):
      __tablename__ =  "service"
      service_id = sa.Column(sa.Integer, primary_key=True)
      name = sa.Column(sa.String(255), nullable=False, index=True, unique=True)
  
  
  class Datacenter(Base, NotesMixin):
      __tablename__ =  "datacenter"
      datacenter_id = sa.Column(sa.Integer, primary_key=True)
      name = sa.Column(sa.String(255), nullable=False, index=True, unique=True)
  
  
  class Network(Base, NotesMixin, StatusMixin):
      __tablename__ =  "network"
      network_id = sa.Column(sa.Integer, primary_key=True)
  
  etc...
  </code></pre>
  
  <p>Now the notes column is the first column in the model/db. I know it does not affect the functionality of my app, but it irritates me a bit to see notes before id, etc. Any way to move it to the end?</p>