#26475: Using functools.partial in model field options causes creation of
unnecessary migration on every 'makemigrations' call
----------------------------+--------------------------------------
Reporter: un-def | Owner: nobody
Type: Bug | Status: new
Component: Migrations | Version: 1.9
Severity: Normal | Resolution:
Keywords: | Triage Stage: Unreviewed
Has patch: 0 | Needs documentation: 0
Needs tests: 0 | Patch needs improvement: 0
Easy pickings: 0 | UI/UX: 0
----------------------------+--------------------------------------
Changes (by oneTimePad):
* needs_better_patch: => 0
* needs_tests: => 0
* needs_docs: => 0
Comment:
partial is not a python class to subclass; it's a function: see
[implementation]
:https://github.com/python/cpython/blob/master/Lib/functools.py#236
Maybe:
{{{
class Partial(object):
def __init__(self,partialFct):
self.func = partialFct
def __call__(self,*args,**kwargs):
return self.func(*args,**kwargs)
def __eq__(self,other):
return( self.func.func == other.func.func and
self.func.args == other.func.args and
self.func.keywords == other.func.keywords)
def __ne__(self,other):
return not self.__eq__(other)
Usage:
def concat(*args):
return ''.join(args)
class TestModel(models.Model):
test_field = models.CharField(max_length =128, default =
Partial(partial(concat, 'foo', 'bar')))
}}}
Just an idea. Not tested with Django.
--
Ticket URL: <https://code.djangoproject.com/ticket/26475#comment:1>
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/064.0b685d28a0cc7055643813197a7579f3%40djangoproject.com.
For more options, visit https://groups.google.com/d/optout.
