docs: def get_field_setup_query(query, model, column_name):
      """
          Help function for SQLA filters, checks for dot notation on column names.
          If it exists, will join the query with the model
          from the first part of the field name.
  
          example:
              Contact.created_by: if created_by is a User model,
              it will be joined to the query.
      """
      if not hasattr(model, column_name):
          # it's an inner obj attr
          rel_model = getattr(model, column_name.split(".")[0]).mapper.class_
          query = query.join(rel_model)
          return query, getattr(rel_model, column_name.split(".")[1])
      else:
          return query, getattr(model, column_name)