I am having trouble saving entities to my models that have ManyToMany
relationships.
I have a Student object that inherits from a Person:
class Person(models.Model):
first_name = models.CharField(max_length=30)
middle_name = models.CharField(max_length=30, blank=True)
last_name = models.CharField(max_length=30)
...
class Student(Person):
parents = models.ManyToManyField('parents.Parent', blank=True,
null=True)
...
class Parent(Person):
occupation = models.CharField(max_length=128, blank=True)
In my view, I create a new Student:
newStudent = Student(first_name='Donald',
middle_name='R', last_name='Duck')
newStudent.save()
I also create a Parent and add the new parent to the list of parents for
the student:
newParent = Parent(first_name='Ronald',
middle_name='T', last_name='Duck')
newParent.save()
newStudent.parents.add(newParent)
However, when I call save_m2m(), it throws an error:
newStudent.save_m2m()
Perhaps I do not need to call save_m2m(). Does the relationship get saved
to the database when I call the add() method?
LJ
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