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[Django] #28111: Allow skipping validations done in database for Model.full_clean()

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[Django] #28111: Allow skipping validations done in database for Model.full_clean()

Django
#28111: Allow skipping validations done in database for Model.full_clean()
-------------------------------------+-------------------------------------
               Reporter:             |          Owner:  nobody
  holvianssi                         |
                   Type:  New        |         Status:  new
  feature                            |
              Component:  Database   |        Version:  master
  layer (models, ORM)                |
               Severity:  Normal     |       Keywords:
           Triage Stage:             |      Has patch:  0
  Unreviewed                         |
    Needs documentation:  0          |    Needs tests:  0
Patch needs improvement:  0          |  Easy pickings:  0
                  UI/UX:  0          |
-------------------------------------+-------------------------------------
 A common practice for Model.save() is to do something like:
 {{{
 def save():
      self.full_clean()
      super().save()
 }}}
 The idea is to validate for example field.choices, and other things that
 aren't checked in database. Unfortunately this also checks unique
 constraints, foreign keys etc, which is non-necessary in the common case -
 the checks would be ran in the database in any case, and the db is much
 faster in checking these constraints.

 It would be nice that we could instead do something like this:
 {{{
 def save():
      self.full_clean(skip_checks_done_in_database=True)
      super().save()
 }}}
 This way we would have the additional safety of checking choices and other
 things that aren't checked in the database, but we wouldn't have overhead
 of checking a lot of constraints that are already checked in the database.

--
Ticket URL: <https://code.djangoproject.com/ticket/28111>
Django <https://code.djangoproject.com/>
The Web framework for perfectionists with deadlines.

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