I'm having a problem generating migrations after changing the function used
for the upload_to parameter on a FileField. After removing the old function
from my code and switching to using a closure to generate the function used
by upload_to I get the following exception upon running makemigrations:
AttributeError: 'module' object has no attribute 'story_image_url'
I made a simple test using an empty app and just renaming the upload_to
function and get the same results because the existing migration references
the old function.
Any suggestions on how to handle this beyond keeping a dummy function in
the code?
Here's an example:
original models.py:
from django.db import models
def ex_upload_to(instance, filename):
return "foo"
class MyModel(models.Model):
file = models.FileField(upload_to=ex_upload_to)
migration:
from __future__ import unicode_literals
from django.db import models, migrations
import example.models
class Migration(migrations.Migration):
dependencies = [
]
operations = [
migrations.CreateModel(
name='MyModel',
fields=[
('id', models.AutoField(verbose_name='ID',
serialize=False, auto_created=True, primary_key=True)),
('file',
models.FileField(upload_to=example.models.ex_upload_to)),
],
options={
},
bases=(models.Model,),
),
]
new models.py:
from django.db import models
def ex_upload_to_new(instance, filename):
return "foo"
class MyModel(models.Model):
file = models.FileField(upload_to=ex_upload_to_new)
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