[英]Django Celery and multiple databases (Celery, Django and RabbitMQ)
Is it possible to set a different database to be used with Django Celery? 是否可以设置要与Django Celery一起使用的其他数据库?
I have a project with multiple databases in configuration and don't want Django Celery to use the default one. 我有一个配置中有多个数据库的项目,并且不希望Django Celery使用默认数据库。
I will be nice if I can still use django celery admin pages and read results stored in this different database :) 如果我仍然可以使用django celery管理页面并读取存储在此不同数据库中的结果,我会很高兴的:)
yes you can. 是的你可以。
first: you can set-up a two databases and specify second one explicitly in for the celery tasks (eg obj.save(using='second')
) 首先:您可以建立两个数据库,并为芹菜任务显式指定第二个数据库(例如
obj.save(using='second')
)
or create second settings.py
which will be used for the celery: 或创建第二个
settings.py
将用于芹菜:
./manage.py celeryd --settings_second
It should be possible to set up a separate database for the django-celery models using Django database routers: 应该可以使用Django数据库路由器为django-celery模型建立一个单独的数据库:
https://docs.djangoproject.com/en/1.4/topics/db/multi-db/#automatic-database-routing https://docs.djangoproject.com/en/1.4/topics/db/multi-db/#automatic-database-routing
I haven't tested this specifically with django-celery, but if it doesn't work for some reason, then it's a bug in django-celery (or Django itself) that should be fixed. 我尚未使用django-celery专门测试过此功能,但是如果由于某种原因它无法正常工作,则应该修复django-celery(或Django本身)中的错误。
Your router would look something like this: 您的路由器看起来像这样:
class CeleryRouter(object):
"Route Celery models to separate DB."
APPS = (
'django', # Models from kombu.transport.django, if you're using Django as a message transport.
'djcelery',
)
DB_ALIAS = 'celery'
def db_for_read(self, model, **hints):
if model._meta.app_label in self.APPS:
return self.DB_ALIAS
return None
def db_for_write(self, model, **hints):
if model._meta.app_label in self.APPS:
return self.DB_ALIAS
return None
def allow_relation(self, obj1, obj2, **hints):
if (obj1._meta.app_label in self.APPS and
obj2._meta.app_label in self.APPS):
return True
return None
def allow_syncdb(self, db, model):
if db == self.DB_ALIAS:
# Only put models from APPS into Celery table (and south for
# migrations).
return model._meta.app_label in self.APPS + ('south',)
elif model._meta.app_label in self.APPS:
# Don't put Celery models anywhere else.
return False
return None
Then add this to your settings: 然后将其添加到您的设置中:
DATABASE_ROUTERS = ['path.to.CeleryRouter']
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