Django ORM - Add data from intermediate table - django

Question

i have the following many to many data structure in my django rest app:
class User(Model):
name = models.CharField(max_length=64)
memberships = models.ManyToManyField('Membership', through='UserMembership', related_name='users')
def __str__(self):
return "{}".format(self.name)
class Membership(Model):
name = models.CharField(max_length=64)
def __str__(self):
return "{}".format(self.name)
class UserMembership(Model):
user = models.ForeignKey('User', on_delete=models.CASCADE)
membership = models.ForeignKey('Membership', on_delete=models.CASCADE)
reason = models.CharField(max_length=64)
When i want to list all users i get:
{
id: 1,
name: "name-a",
memberships: [
{
id: 1,
name: "member-a"
}, ...
]
}
but i actually want to include the "reason" field
{
id: 1,
name: "name-a",
memberships: [
{
id: 1,
name: "member-a",
reason: "somereason"
}, ...
]
}
But how do i modify the queryset?
User.objects.all().values('members__usermember')
doesnt work unfortunetly...
could anybody support?
EDIT:
Serializers:
class UserSerializer(serializers.ModelSerializer):
class Meta:
model = User
fields = ('id', 'name', 'memberships')
class MembershipSerializer(serializers.ModelSerializer):
class Meta:
model = Membership
fields = ('id', 'name')

Answer 1

I think that the solution to your problem has to do more with how are you serializing the objects that with the queryset itself.
Are you using django-rest-framework, if so, please add the serializers to the response. Otherwise, comment and add the code to view how are you serializing the models.
Edit to add possible serializers:
Try with something similar to this snipped
class UserMembershipSerializer(serializer.ModelSerializer):
name = serializers.ReadOnlyField(source='membership.name')
class Meta:
model = UserMembership
fields = ('reason', 'name')
class UserSerializer(serializer.ModelSerializer):
memberships = UserMembershipSerializer(source='usermembership_set', many=True)
class Meta:
model = User
fields = ('id', 'name', 'memberships')