mirror of https://github.com/django/django.git
62 lines
1.8 KiB
Python
62 lines
1.8 KiB
Python
from django.db import DEFAULT_DB_ALIAS
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class TestRouter:
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"""
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Vaguely behave like primary/replica, but the databases aren't assumed to
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propagate changes.
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"""
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def db_for_read(self, model, instance=None, **hints):
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if instance:
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return instance._state.db or "other"
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return "other"
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def db_for_write(self, model, **hints):
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return DEFAULT_DB_ALIAS
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def allow_relation(self, obj1, obj2, **hints):
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return obj1._state.db in ("default", "other") and obj2._state.db in (
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"default",
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"other",
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)
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def allow_migrate(self, db, app_label, **hints):
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return True
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class AuthRouter:
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"""
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Control all database operations on models in the contrib.auth application.
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"""
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def db_for_read(self, model, **hints):
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"Point all read operations on auth models to 'default'"
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if model._meta.app_label == "auth":
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# We use default here to ensure we can tell the difference
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# between a read request and a write request for Auth objects
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return "default"
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return None
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def db_for_write(self, model, **hints):
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"Point all operations on auth models to 'other'"
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if model._meta.app_label == "auth":
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return "other"
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return None
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def allow_relation(self, obj1, obj2, **hints):
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"Allow any relation if a model in Auth is involved"
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return obj1._meta.app_label == "auth" or obj2._meta.app_label == "auth" or None
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def allow_migrate(self, db, app_label, **hints):
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"Make sure the auth app only appears on the 'other' db"
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if app_label == "auth":
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return db == "other"
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return None
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class WriteRouter:
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# A router that only expresses an opinion on writes
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def db_for_write(self, model, **hints):
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return "writer"
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