Say I am using an intermediary model like that in the doc:
class Person(models.Model):
name = models.CharField(max_length=128)
class Group(models.Model):
name = models.CharField(max_length=128)
members = models.ManyToManyField(Person, through='Membership')
class Membership(models.Model):
person = models.ForeignKey(Person)
group = models.ForeignKey(Group)
date_joined = models.DateField()
For a given group, say I want to go through the persons in the group
and print the date each joined the group.
beatles = Group.objects.get(name="beatles")
for person in group.members.all():
# get join date for person
What's the best way to do this? It seems to me that I have to add a
related_name to the person field of Membership like this:
person = models.ForeignKey(Person, related_name="memberships")
and then traverse backward from the person back to the membership,
filtering to find the correct membership based on the group name. Can
someone tell me if there is a better way? So I'm thinking I have to
do this:
beatles = Group.objects.get(name="beatles")
for person in group.members.all():
joinDate = person.memberships.filter(group_name="beatles")
[0].date_joined
Thanks for any pointers,
Margie
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