I am following the example in the documentation: https://docs.djangoproject.com/en/3.2/topics/db/models/#extra-fields-on-many-to-many-relationships
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from django.db import models
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class Person(models.Model):
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name = models.CharField(max_length=128)
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def __str__(self):
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return self.name
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class Group(models.Model):
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name = models.CharField(max_length=128)
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members = models.ManyToManyField(Person, through='Membership')
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def __str__(self):
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return self.name
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class Membership(models.Model):
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person = models.ForeignKey(Person, on_delete=models.CASCADE)
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group = models.ForeignKey(Group, on_delete=models.CASCADE)
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date_joined = models.DateField()
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invite_reason = models.CharField(max_length=64)
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In this case, given a Person object, how can I access all the groups that Person is in?
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Answer
You access these with:
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Group.objects.filter(members=my_person_object)