#13527: Allow column on ForeignKey
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Reporter: malthe | Owner: nobody
Status: new | Milestone:
Component: Database layer (models, ORM) | Version: 1.1
Keywords: | Stage: Unreviewed
Has_patch: 0 |
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Currently, on the many-side of a `ManyToOne` relation, the underlying
value of the relation is always stored in `fieldname_id` (both on the
database side and in the ORM). However, this value will often be
meaningful on its own and it should be possible to explicitly provide a
name, e.g. `from_field` (the database column name would be
"%(from_field)s_id".)
The following implements this:
{{{
class CustomForeignKey(models.ForeignKey):
def __init__(self, *args, **kwargs):
self.from_field = kwargs.pop('from_field')
if self.from_field:
kwargs.setdefault('db_column', "%s_id" % self.from_field)
return super(CustomForeignKey, self).__init__(*args, **kwargs)
def get_attname(self):
return self.from_field or "%s_id" % self.name
}}}
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Ticket URL: <http://code.djangoproject.com/ticket/13527>
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