Django: How to create a model dynamically just for testing

by

You can put your tests in a tests/ subdirectory of the app (rather than a tests.py file), and include a tests/models.py with the test-only models.

Then provide a test-running script (example) that includes your tests/ “app” in INSTALLED_APPS. (This doesn’t work when running app tests from a real project, which won’t have the tests app in INSTALLED_APPS, but I rarely find it useful to run reusable app tests from a project, and Django 1.6+ doesn’t by default.)

(NOTE: The alternative dynamic method described below only works in Django 1.1+ if your test case subclasses TransactionTestCase – which slows down your tests significantly – and no longer works at all in Django 1.7+. It’s left here only for historical interest; don’t use it.)

At the beginning of your tests (i.e. in a setUp method, or at the beginning of a set of doctests), you can dynamically add "myapp.tests" to the INSTALLED_APPS setting, and then do this:

from django.core.management import call_command
from django.db.models import loading
loading.cache.loaded = False
call_command('syncdb', verbosity=0)

Then at the end of your tests, you should clean up by restoring the old version of INSTALLED_APPS and clearing the app cache again.

This class encapsulates the pattern so it doesn’t clutter up your test code quite as much.

More Related Contents:

  1. django.core.exceptions.ImproperlyConfigured: Requested setting INSTALLED_APPS, but settings are not configured. plz help me out plz
  2. What is the difference between null=True and blank=True in Django?
  3. What’s the difference between select_related and prefetch_related in Django ORM?
  4. Can “list_display” in a Django ModelAdmin display attributes of ForeignKey fields?
  5. How to pull a random record using Django’s ORM?
  6. Django – No such table: main.auth_user__old
  7. Django rest framework serializing many to many field
  8. Django Unique Together (with foreign keys)
  9. django template system, calling a function inside a model
  10. Django : Table doesn’t exist
  11. Django Model MultipleChoice
  12. How to filter objects for count annotation in Django?
  13. Access django models inside of Scrapy
  14. Python mock multiple return values
  15. How do I separate my models out in django?
  16. ‘NOT NULL constraint failed’ after adding to models.py
  17. “_set” in a queryset object in Django
  18. Nested inlines in the Django admin?
  19. Difference between AbstractUser and AbstractBaseUser in Django?
  20. Mock Python’s built in print function
  21. Django – form.save() is not creating ModelForm
  22. Mocking Functions Using Python Mock
  23. Override a form in Django admin
  24. How can I set a default value for a field in a Django model?
  25. Django filter JSONField list of dicts
  26. how to manually assign imagefield in Django
  27. Single Table Inheritance in Django
  28. Add custom form fields that are not part of the model (Django)
  29. Can a dictionary be passed to django models on create?
  30. Django cannot import name x [duplicate]

Leave a Comment