graphene-django/examples/starwars/models.py

from __future__ import absolute_import

from django.db import models


class Character(models.Model):
    name = models.CharField(max_length=50)
    ship = models.ForeignKey('Ship', on_delete=models.CASCADE, blank=True, null=True, related_name='characters')

    def __str__(self):
        return self.name


class Faction(models.Model):
    name = models.CharField(max_length=50)
    hero = models.ForeignKey(Character, on_delete=models.CASCADE)

    def __str__(self):
        return self.name


class Ship(models.Model):
    name = models.CharField(max_length=50)
    faction = models.ForeignKey(Faction, on_delete=models.CASCADE, related_name='ships')

    def __str__(self):
        return self.name