def save(self, commit=True, task=None):
if task:
self.instance.task = task
super(ProblemForm, self).save(commit)
if task:
task.problem_set.add(self.instance)
if 'grade_system' in self.cleaned_data:
grade_system = self.cleaned_data['grade_system']
if self.instance.task:
MarkAPI.delete_mark_sets(self.instance.task)
MarkAPI.delete_mark_sets(self.instance)
# Creation of marks for problem
MarkAPI.create_marks_for_problem(self.instance, grade_system)
return self.instance
