mirror of
https://github.com/django/django.git
synced 2024-12-30 13:05:45 +00:00
61 lines
1.9 KiB
Python
61 lines
1.9 KiB
Python
from __future__ import unicode_literals
|
|
|
|
from django.db import DEFAULT_DB_ALIAS
|
|
|
|
|
|
class TestRouter(object):
|
|
# A test router. The behavior is vaguely primary/replica, but the
|
|
# databases aren't assumed to propagate changes.
|
|
def db_for_read(self, model, instance=None, **hints):
|
|
if instance:
|
|
return instance._state.db or 'other'
|
|
return 'other'
|
|
|
|
def db_for_write(self, model, **hints):
|
|
return DEFAULT_DB_ALIAS
|
|
|
|
def allow_relation(self, obj1, obj2, **hints):
|
|
return obj1._state.db in ('default', 'other') and obj2._state.db in ('default', 'other')
|
|
|
|
def allow_migrate(self, db, model):
|
|
return True
|
|
|
|
|
|
class AuthRouter(object):
|
|
"""A router to control all database operations on models in
|
|
the contrib.auth application"""
|
|
|
|
def db_for_read(self, model, **hints):
|
|
"Point all read operations on auth models to 'default'"
|
|
if model._meta.app_label == 'auth':
|
|
# We use default here to ensure we can tell the difference
|
|
# between a read request and a write request for Auth objects
|
|
return 'default'
|
|
return None
|
|
|
|
def db_for_write(self, model, **hints):
|
|
"Point all operations on auth models to 'other'"
|
|
if model._meta.app_label == 'auth':
|
|
return 'other'
|
|
return None
|
|
|
|
def allow_relation(self, obj1, obj2, **hints):
|
|
"Allow any relation if a model in Auth is involved"
|
|
if obj1._meta.app_label == 'auth' or obj2._meta.app_label == 'auth':
|
|
return True
|
|
return None
|
|
|
|
def allow_migrate(self, db, model):
|
|
"Make sure the auth app only appears on the 'other' db"
|
|
if db == 'other':
|
|
return model._meta.app_label == 'auth'
|
|
elif model._meta.app_label == 'auth':
|
|
return False
|
|
return None
|
|
|
|
|
|
class WriteRouter(object):
|
|
# A router that only expresses an opinion on writes
|
|
def db_for_write(self, model, **hints):
|
|
return 'writer'
|