message: [slice_json] pass slice id to get_form_data()
diff: @@ -998,6 +998,7 @@ class Superset(BaseSupersetView):
  # the form_data from the DB with the other form_data provided
  slice_id = form_data.get('slice_id') or slice_id
  slc = None
  +
  if slice_id:
  slc = db.session.query(models.Slice).filter_by(id=slice_id).first()
  slice_form_data = slc.form_data.copy()
  @@ -1122,10 +1123,10 @@ class Superset(BaseSupersetView):
  @expose('/slice_json/<slice_id>')
  def slice_json(self, slice_id):
  try:
  - viz_obj = self.get_viz(slice_id)
  - datasource_type = viz_obj.datasource.type
  - datasource_id = viz_obj.datasource.id
  - form_data, slc = self.get_form_data()
  + form_data, slc = self.get_form_data(slice_id)
  + datasource_type = slc.datasource.type
  + datasource_id = slc.datasource.id
  +
  except Exception as e:
  return json_error_response(
  utils.error_msg_from_exception(e),
  