def update_model(self, form, model):
"""Update the metadata for a record."""
try:
new_json_data = request.form.get('json')
if new_json_data:
record = Record(model.json, model=model)
record.clear()
record.update(json.loads(new_json_data))
record.commit()
self.session.commit()
except ValidationError as ex:
flash('Failed to update record, provided metadata is invalid: %s' % ex.message, 'error')
return False
except Exception as ex:
if not self.handle_view_exception(ex):
flash('Failed to update record. %s' % str(ex), 'error')
self.session.rollback()
return False
else:
self.after_model_change(form, model, False)
return True
