我有一个（遗留）数据库，包含以下表格。如何在Django的视图和模板中遵循从orders对象到delivery_adress的关系？
在SQL中，我只是在customer_fk = customer_fk和customer_fk = customer_fk上使用join delivery_adress，但它如何在Django ORM中运行？
这些表定义如下（我试图标记FK关系）：
orders
id | ordernr | product | amount | customer (FK) | delivery_adress (FK)
---+---------+---------+--------+---------------+---------------------
1 | 20 | 5 | 200 | 1 | 1
2 | 21 | 3 | 400 | 2 | 1
3 | 22 | 2 | 20 | 2 | 2
4 | 23 | 1 | 1 | 3 | 1
| |
customer --------------------------- |
id | name |---- |
---+-------+ | |
1 | John | | |
2 | Steve | | ---------
3 | Guy | | |
4 | Joe | | |
| |
delivery_adress
customer (PK/FK) | delivery_adress(PK) | adress
-----------------+---------------------+-------
1 | 1 | SF
2 | 1 | LA
2 | 2 | NY
3 | 1 | CH
Model delivery_adress是：
class Delivery_adress(models.Model):
customer= models.ForeignKey(Customer, models.DO_NOTHING, db_column='adresse', primary_key=True)
delivery_adress = models.CharField(max_length=6, primary_key=True)
#... other stuff ...
class Meta:
managed = False
unique_together = (('customer', 'delivery_adress'),)