Merge pull request pallets-eco#1420 from pawl/fix_1223

use property name rather than db column name for form_choices

flask_admin/contrib/sqla/form.py

@@ -243,7 +243,7 @@ def convert(self, model, mapper, name, prop, field_args, hidden_pk):
  form_choices = getattr(self.view, 'form_choices', None)
 
  if mapper.class_ == self.view.model and form_choices:
- choices = form_choices.get(column.key)
+ choices = form_choices.get(prop.key)
  if choices:
  return form.Select2Field(
  choices=choices,
@@ -537,7 +537,7 @@ def process_ajax_refs(self, info):
  def _calculate_mapping_key_pair(self, model, info):
  """
  Calculate mapping property key pair between `model` and inline model,
- including the forward one for `model` and the reverse one for inline model. 
+ including the forward one for `model` and the reverse one for inline model.
  Override the method to map your own inline models.
 
  :param model: