mirror of
https://github.com/django/django.git
synced 2024-12-25 02:26:12 +00:00
38 lines
1012 B
Python
38 lines
1012 B
Python
from django.db import models
|
|
|
|
|
|
class Address(models.Model):
|
|
company = models.CharField(max_length=1)
|
|
customer_id = models.IntegerField()
|
|
|
|
class Meta:
|
|
unique_together = [
|
|
('company', 'customer_id'),
|
|
]
|
|
|
|
|
|
class Customer(models.Model):
|
|
company = models.CharField(max_length=1)
|
|
customer_id = models.IntegerField()
|
|
address = models.ForeignObject(
|
|
Address, models.CASCADE, null=True,
|
|
# order mismatches the Contact ForeignObject.
|
|
from_fields=['company', 'customer_id'],
|
|
to_fields=['company', 'customer_id'],
|
|
)
|
|
|
|
class Meta:
|
|
unique_together = [
|
|
('company', 'customer_id'),
|
|
]
|
|
|
|
|
|
class Contact(models.Model):
|
|
company_code = models.CharField(max_length=1)
|
|
customer_code = models.IntegerField()
|
|
customer = models.ForeignObject(
|
|
Customer, models.CASCADE, related_name='contacts',
|
|
to_fields=['customer_id', 'company'],
|
|
from_fields=['customer_code', 'company_code'],
|
|
)
|