Add foreign object in memory without saving to database

[cyberkoa@…]

Similar to the following post
​http://stackoverflow.com/questions/7908349/django-making-relationships-in-memory-without-saving-to-db?answertab=active#tab-top

class Group:

name = models.Chars()

def save():

super(self, Group).save()
# access foreign objects
members = self.groupmember_set.all()

class GroupMember:

group = models.ForeignKey(Group)
member = modesl.ForeignKey(User)

I have a page to allow people to create Group , and invited existing user to become member.

When form is submitted, Group data and GroupMember data is submitted together.

I would like to override the Group's save function() , and in the save function(), I need to access the GroupMember data.

Example code

g = Group(name='abc')
gm1 = GroupMember(member=user1, group=g)
gm2 = GroupMember(member=user2, group=g)

g.groupmember_set.add(gm1) # Add to memory , I do not want to save to db immediately
g.groupmember_set.add(gm2) # Add to memory , I do not want to save to db immediately
g.save()
gm1.save()
gm2.save()

Since the .add() function save the related object to db immediately , causing error.

I do not want to save the Group object first , because it will trigger 2 times save()