#30547: Specify what happens during model validation with Meta.constraints
-------------------------------------+-------------------------------------
               Reporter:  Dirk       |          Owner:  nobody
  Groten                             |
                   Type:             |         Status:  new
  Cleanup/optimization               |
              Component:             |        Version:  2.2
  Documentation                      |       Keywords:  constraints,
               Severity:  Normal     |  UniqueConstraint
           Triage Stage:             |      Has patch:  0
  Unreviewed                         |
    Needs documentation:  0          |    Needs tests:  0
Patch needs improvement:  0          |  Easy pickings:  0
                  UI/UX:  0          |
-------------------------------------+-------------------------------------
 The current [https://docs.djangoproject.com/en/2.2/ref/models/constraints/
 constraints reference] does not mention whether or not a
 **ValidationError** is raised during model validation if a constraint
 fails. The documentation only mentions that a database constraint is
 created.

 However, for the soon to be deprecated `unique_together`, there is a
 reference to model validation.

 As far as I can see, a `UniqueConstraint` causes `validate_unique()` to
 check for uniqueness and raises a **ValidationError**. But a
 `CheckConstraint` does not cause a **ValidationError** when the model is
 validated. I believe it's important to mention this in the documentation.

-- 
Ticket URL: <https://code.djangoproject.com/ticket/30547>
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 django-updates+unsubscr...@googlegroups.com.
To post to this group, send email to django-updates@googlegroups.com.
To view this discussion on the web visit 
https://groups.google.com/d/msgid/django-updates/051.96bad640084b74042605819a9c22ffdb%40djangoproject.com.
For more options, visit https://groups.google.com/d/optout.

Reply via email to