#27530: Referencing a function in a model field definition, and then removing
that
reference (and function) after running a migration raises an exception
-----------------------------------------+------------------------
Reporter: Jesse | Owner: nobody
Type: Uncategorized | Status: new
Component: Uncategorized | Version: 1.10
Severity: Normal | Keywords:
Triage Stage: Unreviewed | Has patch: 0
Needs documentation: 0 | Needs tests: 0
Patch needs improvement: 0 | Easy pickings: 0
UI/UX: 0 |
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With a FileField you can define a function for the upload_to argument. If
you reference a function within that field, and then decide to modify the
field later by removing the function reference (and also the function),
the migrations will cause the server to fail to start because it can't
find the function that was previously referenced.
For example:
{{{
def destination():
return "path"
...
file = models.FileField(upload_to=destination)
}}}
Then later on I decide I don't need the function
{{{
file = models.FileField(upload_to="hardcoded path")
}}}
Now whenever I try to run the server locally or do a migration, I get:
"AttributeError: 'module' object has no attribute 'destination'". The only
meaningful workaround is to delete all migrations
--
Ticket URL: <https://code.djangoproject.com/ticket/27530>
Django <https://code.djangoproject.com/>
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