fix(form): speed up copying of documents

caluma/caluma_form/models.py

@@ -396,10 +396,15 @@ def set_family(self, root_doc):
 
  def copy(self, family=None, user=None):
  """Create a copy including all its answers."""
+ from caluma.caluma_form.utils import recalculate_answers_from_document
+
+ # defer calculated questions, as many unecessary recomputations will happen otherwise
+ meta = dict(self.meta)
+ meta["_defer_calculation"] = True
 
  new_document = type(self).objects.create(
  form=self.form,
- meta=dict(self.meta),
+ meta=meta,
  source=self,
  family=family,
  created_by_user=user.username if user else None,
@@ -416,6 +421,10 @@ def copy(self, family=None, user=None):
  document_family=family, to_document=new_document, user=user
  )
 
+ new_document.meta.pop("_defer_calculation", None)
+ new_document.save()
+ recalculate_answers_from_document(new_document)
+
  return new_document
 
  @cached_property