#23473: Django prompts to create new migrations when none are needed when a
class
is used in a field declaration
----------------------------+--------------------------------------
Reporter: dlo | Owner: nobody
Type: Bug | Status: new
Component: Migrations | Version: 1.7
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
----------------------------+--------------------------------------
Description changed by dlo:
Old description:
> Create a model like so:
>
> {{{
> from django.db import models
> from django.utils.deconstruct import deconstructible
>
> @deconstructible
> class IgnoreFormatString(object):
> def __init__(self, s):
> self.s = s
>
> def __str__(self):
> return self.s
>
> def __mod__(self, k):
> return self
>
> class Product(models.Model):
> name = models.CharField(max_length=32, blank=True, null=True,
> error_messages={'invalid': IgnoreFormatString('At this time, we do not
> carry half-sizes. We recommend rounding up.')})
> }}}
>
> Create a migration, and then run it. If you run "./manage.py migrate"
> once again, you'll get prompted with
>
> {{{
> Your models have changes that are not yet reflected in a migration, and
> so won't be applied.
> Run 'manage.py makemigrations' to make new migrations, and then re-run
> 'manage.py migrate' to apply them.
> }}}
>
> Running makemigrations will create another migration, yet this message
> will continue to appear if the migration has already been applied.
New description:
Create a model like so:
{{{
from django.db import models
from django.utils.deconstruct import deconstructible
@deconstructible
class IgnoreFormatString(object):
def __init__(self, s):
self.s = s
def __str__(self):
return self.s
def __mod__(self, k):
return self
class Product(models.Model):
name = models.CharField(max_length=32, blank=True, null=True,
error_messages={'invalid': IgnoreFormatString('Err, this is invalid.')})
}}}
Create a migration, and then run it. If you run "./manage.py migrate" once
again, you'll get prompted with
{{{
Your models have changes that are not yet reflected in a migration, and
so won't be applied.
Run 'manage.py makemigrations' to make new migrations, and then re-run
'manage.py migrate' to apply them.
}}}
Running makemigrations will create another migration, yet this message
will continue to appear if the migration has already been applied.
--
--
Ticket URL: <https://code.djangoproject.com/ticket/23473#comment:2>
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