来自多个数据表的Django模型

Question

I want to ask if there is a convenient way that allows me to create a django model from multiple tables. I am looking for solution, that can be written in similar way:

class ClientTeamContacts(models.Model):
    attribute_1 = models.CharField(db_column='ss',db_table = 'xxx')
    attribute_2 = models.CharField(db_column='cc',db_table = 'yyy')

I will be thankful for every suggestion that can provide some solution.

Answer 1

Unfortunately, without hacking the django core, I think the best you can hope for is something like this:

class ClientTeamContacts(models.Model):
    attribute_1 = models.ForeignKey('xxx', on_delete=models.CASCADE)
    attribute_2 = models.ForeignKey('yyy', on_delete=models.CASCADE)

This will let you access and modify SS and CC despite them living on a different table.

record = ClientTeamContacts.objects.get(xxx.ss = 'Smith')
record.xxx.ss = 'Brown'
record.save()

Alternatively, look into using abstract base classes, they abstract out common data and may provide a different way to solve your problem:

https://docs.djangoproject.com/en/2.0/topics/db/models/#abstract-base-classes