I set a models.FilePathField with the path attribute as an instance of an
object implementing __str__. I works well until I needed to get the
corresponding Form Field. It caused the following error:
TypeError: listdir: path should be string, bytes, os.PathLike, integer
or None, not StringSettingsReference
StringSettingsReference is my custom Class I mentioned implements the
__str__ method.
listdir is complaining because there is some code trying to do the
following:
for f in sorted(os.listdir(self.path)):
This code is from `django/forms/fields.py` (Django 1.11).
What I want to point out is that Django allowed me to create a model where
a FilePathField was initialized with a path attribute with type different
from string, bytes, os.PathLike, integer or None; and then, only Form Field
related code complains about that (I was using my app for some time and
realized about this just because decided to reuse the admin site (yes, my
application is not using form so much)).
Django should complain before (not allowing me to create a model like that)
or what would be more convenience for me is to not complains about that.
So, I was thinking to fill a bug report, but it is write in the Django
documentation that it is a good idea to ask here before.
Does this qualify as a Bug?
Addendum:
Why am I using an special class anyway?
Because I wanted the path to be relative to a setting variable, but writing
anything but a string in the model definition is not allowed by the
migration serializing mechanism. I mean, I wanted to do the following:
class MyModel(...).
.
.
.
a_file_path = models.FilePathField(path=settings.SOMEVARIABLE, ...)
but I can't write SOMEVARIABLE. So I had to create a "deconstructible"
class:
@deconstructible
class StringSettingsReference:
def __init__(self, name):
self.name = name
def __str__(self):
return getattr(settings, self.name)
and use it like:
a_file_path =
models.FilePathField(path=StringSettingsReference('SOMEVARIABLE'), ...)
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