title: Django: how to read the db_column name of a model field
body: <p>I need to know the db_column name of various model fields. On a few models the name is explicitly set by "db_column='foo'", but most of the models/fields have the name automatically generated by Django.</p>
  
  <p>How can I retrieve the column_name for <strong>all</strong> fields from within a model's instance?</p>