#26892: Add documentation about db_constraint for FK and M2M in Multiple
Databases
section
-------------------------------------+-------------------------------------
Reporter: Pawamoy | Owner: nobody
Type: | Status: new
Cleanup/optimization |
Component: Documentation | Version: 1.9
Severity: Normal | Keywords: fk m2m db_constraint
| doc
Triage Stage: Unreviewed | Has patch: 0
Easy pickings: 1 | UI/UX: 0
-------------------------------------+-------------------------------------
Working on a project that uses several databases, I have searched for a
long time the best way to have "fake" or "cross-db" foreign keys between
tables that are not on the same database.
I was very surprised when I recently heard about the db_constraint
attribute in model fields ForeignKey and ManyToManyField, and wondered why
I have found so many ugly hacks before this very Django feature.
Documentation in the Multiple Databases section was very useful, but it
would have been a lot more if db_constraint was mentioned in it. And a
link back to Multiple Databases from ForeignKey and ManyToManyField
db_constraint in model fields reference would also be great.
In don't know when db_constraint appeared but this modification should of
course apply to each concerned version of Django (I know 1.8 and following
are).
https://docs.djangoproject.com/en/1.9/topics/db/multi-db/
https://docs.djangoproject.com/en/1.9/ref/models/fields/#django.db.models.ForeignKey.db_constraint
https://docs.djangoproject.com/en/1.9/ref/models/fields/#django.db.models.ManyToManyField.db_constraint
--
Ticket URL: <https://code.djangoproject.com/ticket/26892>
Django <https://code.djangoproject.com/>
The Web framework for perfectionists with deadlines.
--
You received this message because you are subscribed to the Google Groups
"Django updates" group.
To unsubscribe from this group and stop receiving emails from it, send an email
to [email protected].
To post to this group, send email to [email protected].
To view this discussion on the web visit
https://groups.google.com/d/msgid/django-updates/050.48c73761fa6080c31e2786ca0c536f95%40djangoproject.com.
For more options, visit https://groups.google.com/d/optout.
