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111 lines
3.3 KiB
Python
111 lines
3.3 KiB
Python
5 years ago
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"""
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Hacks for the Django 1.0/1.0.2 releases.
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"""
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import django
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from django.conf import settings
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from django.db.backends.creation import BaseDatabaseCreation
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from django.db.models.loading import cache
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from django.core import management
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from django.core.management.commands.flush import Command as FlushCommand
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from django.utils.datastructures import SortedDict
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from south.utils.py3 import string_types
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class SkipFlushCommand(FlushCommand):
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def handle_noargs(self, **options):
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# no-op to avoid calling flush
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return
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class Hacks:
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def set_installed_apps(self, apps):
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"""
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Sets Django's INSTALLED_APPS setting to be effectively the list passed in.
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"""
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# Make sure it's a list.
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apps = list(apps)
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# Make sure it contains strings
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if apps:
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assert isinstance(apps[0], string_types), "The argument to set_installed_apps must be a list of strings."
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# Monkeypatch in!
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settings.INSTALLED_APPS, settings.OLD_INSTALLED_APPS = (
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apps,
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settings.INSTALLED_APPS,
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)
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self._redo_app_cache()
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def reset_installed_apps(self):
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"""
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Undoes the effect of set_installed_apps.
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"""
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settings.INSTALLED_APPS = settings.OLD_INSTALLED_APPS
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self._redo_app_cache()
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def _redo_app_cache(self):
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"""
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Used to repopulate AppCache after fiddling with INSTALLED_APPS.
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"""
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cache.loaded = False
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cache.handled = set() if django.VERSION >= (1, 6) else {}
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cache.postponed = []
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cache.app_store = SortedDict()
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cache.app_models = SortedDict()
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cache.app_errors = {}
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cache._populate()
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def clear_app_cache(self):
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"""
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Clears the contents of AppCache to a blank state, so new models
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from the ORM can be added.
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"""
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self.old_app_models, cache.app_models = cache.app_models, {}
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def unclear_app_cache(self):
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"""
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Reversed the effects of clear_app_cache.
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"""
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cache.app_models = self.old_app_models
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cache._get_models_cache = {}
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def repopulate_app_cache(self):
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"""
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Rebuilds AppCache with the real model definitions.
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"""
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cache._populate()
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def store_app_cache_state(self):
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self.stored_app_cache_state = dict(**cache.__dict__)
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def restore_app_cache_state(self):
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cache.__dict__ = self.stored_app_cache_state
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def patch_flush_during_test_db_creation(self):
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"""
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Patches BaseDatabaseCreation.create_test_db to not flush database
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"""
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def patch(f):
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def wrapper(*args, **kwargs):
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# hold onto the original and replace flush command with a no-op
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original_flush_command = management._commands['flush']
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try:
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management._commands['flush'] = SkipFlushCommand()
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# run create_test_db
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return f(*args, **kwargs)
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finally:
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# unpatch flush back to the original
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management._commands['flush'] = original_flush_command
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return wrapper
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BaseDatabaseCreation.create_test_db = patch(BaseDatabaseCreation.create_test_db)
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