Could it be related to a third-party app similar to
https://code.djangoproject.com/ticket/27365#comment:12 ?
On Thursday, May 4, 2017 at 5:12:47 PM UTC-4, Evan Heidtmann wrote:
>
> Hello Django friends,
>
>
> My app, running in production with uwsgi, very occasionally will crash
> because of a FieldError on a (valid) reverse ForeignKey relationship field.
> Without any code changes, other requests will succeed. Tests that cover
> this code path always pass.
>
>
> The two models are in different apps. Both apps are listed in
> INSTALLED_APPS and the calling module imports both models modules at top
> level. One of the models is "replaceable" but I'm using the original model
> (it's oauth2_provider.Application)
>
>
> # app1/models.pyclass A(models.Model):
> name = models.CharField(max_length=20)
> def get_A_model():
> # ... some thirdparty code for replaceable models ...
> # app2/models.pyclass B(models.Model):
> myname = models.CharField(max_length=20)
> a = models.ForeignKey('app1.A')
> # app2/views.pyimport app1.models as app1_modelsfrom . import models
> def view(request):
> # This line crashes with "FieldError: Cannot resolve keyword 'b' into
> field. Choices are: ..."
> qs = app1_models.get_A_model().objects.filter(b__myname='larry')
>
>
> This smells like some kind of deployment issue (code loading too late or
> not at all?) but if so, I don't know how to debug. Thanks for taking a look
> and let me know what I can do to gather more helpful information.
>
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