Dev discussions typically happen on #django-dev on the Freenode IRC network.
-- C On 18 March 2015 at 19:54, Thomas Stephenson <[email protected]> wrote: > IRC discussion sounds fine with me, but I'd like to be involved. What's > the channel? > > Thomas > > On 18 March 2015 at 15:47, Asif Saifuddin <[email protected]> wrote: > >> but? IRC discussion? >> >> On Tuesday, March 17, 2015 at 9:09:49 PM UTC+6, Thomas Stephenson wrote: >>> >>> Not impatient or anything, but... >>> >>> Bump. >>> >>> On 13 March 2015 at 14:07, Thomas Stephenson <[email protected]> wrote: >>> >>>> All the null handling stuff has been removed from the specification and >>>> replaced with slightly more stringent restrictions on `value_to_dict`. >>>> There is an updated version which includes that change, plus a couple more >>>> alterations that were discussed here and on the PR available here. >>>> <https://github.com/django/deps/pull/12> >>>> >>>> Thomas >>>> >>>> On 9 March 2015 at 17:43, Anssi Kääriäinen <[email protected]> wrote: >>>> >>>>> On Mon, Mar 9, 2015 at 8:06 AM, Thomas Stephenson <[email protected]> >>>>> wrote: >>>>> >> It doesn't result in good table design and adds >>>>> restrictions/complication >>>>> >> to the ORM/migrations. >>>>> > >>>>> > Well, honestly, making all subfields always nullable (whether it is >>>>> or not) >>>>> > in order to support the composite field being potentially nullable >>>>> doesn't >>>>> > really result in good table design either. >>>>> > >>>>> >> Enforcing that both x and y have a value should be handled with a >>>>> >> constraint and/or validators. >>>>> > >>>>> > There is _no_ problem that is better handled with validators than an >>>>> > equivalent database constraint unless you assume that the framework >>>>> is the >>>>> > only client your database will ever have. >>>>> >>>>> You'll likely need both. The database constraint is there to catch all >>>>> errors, whether generated by the framework or some other client. The >>>>> validator will supply nice user-facing error messages. This is how >>>>> unique constraints work for example: there is a model validator that >>>>> says "this value already exists in the database", but we also have >>>>> database level constraint to make sure there is no way to store >>>>> invalid values. >>>>> >>>>> >> -1 on silently changing the field definition. At best this would >>>>> result in >>>>> >> an unnecessary migration when the error is discovered. Django >>>>> should error >>>>> >> out with a message that the composite field definition is invalid. >>>>> > >>>>> > Changing the subfield definitions in the composite field constructor >>>>> has to >>>>> > be supported, there's no way of passing parameters to subfields if >>>>> you >>>>> > don't. What mistake is there to be found? Either you want the >>>>> composite >>>>> > field to be nullable or you don't. You're being explicit about it by >>>>> passing >>>>> > `null=True` into the field definition and it's a standard field >>>>> parameter. >>>>> >>>>> If the user supplies the fields, then we don't want to change them >>>>> silently. We could have checks framework error for incompatible >>>>> settings however. If the field auto-creates the subfields, then it can >>>>> alter them in any way it wishes. >>>>> >>>>> Making the composite field null only when all of its subfields are >>>>> null seems the right behavior to me. Otherwise you'd have strange >>>>> cases where .filter(money__amount=10) is true, but >>>>> .filter(money__isnull=True) is also true for the same row. >>>>> >>>>> - Anssi >>>>> >>>>> -- >>>>> You received this message because you are subscribed to the Google >>>>> Groups "Django developers (Contributions to Django itself)" 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]. >>>>> Visit this group at http://groups.google.com/group/django-developers. >>>>> To view this discussion on the web visit https://groups.google.com/d/ >>>>> msgid/django-developers/CALMtK1GCSfemy%2BN0HLPMbsovwgcSy%2BwEw6QF-% >>>>> 2BoZ-tfBCTSkUw%40mail.gmail.com. >>>>> For more options, visit https://groups.google.com/d/optout. >>>>> >>>> >>>> >>> -- >> You received this message because you are subscribed to the Google Groups >> "Django developers (Contributions to Django itself)" 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]. >> Visit this group at http://groups.google.com/group/django-developers. >> To view this discussion on the web visit >> https://groups.google.com/d/msgid/django-developers/0f8b0979-7e15-45d2-ab76-88dc747a0bf7%40googlegroups.com >> <https://groups.google.com/d/msgid/django-developers/0f8b0979-7e15-45d2-ab76-88dc747a0bf7%40googlegroups.com?utm_medium=email&utm_source=footer> >> . >> >> For more options, visit https://groups.google.com/d/optout. >> > > -- > You received this message because you are subscribed to the Google Groups > "Django developers (Contributions to Django itself)" 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]. > Visit this group at http://groups.google.com/group/django-developers. > To view this discussion on the web visit > https://groups.google.com/d/msgid/django-developers/CA%2Bm8oA_mryzSJtdp4mB7KZ%2BRJxVqAX-nE7tY-5tJ%3DORwyrx9Rg%40mail.gmail.com > <https://groups.google.com/d/msgid/django-developers/CA%2Bm8oA_mryzSJtdp4mB7KZ%2BRJxVqAX-nE7tY-5tJ%3DORwyrx9Rg%40mail.gmail.com?utm_medium=email&utm_source=footer> > . > > For more options, visit https://groups.google.com/d/optout. > -- You received this message because you are subscribed to the Google Groups "Django developers (Contributions to Django itself)" group. 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