步骤：
1、在工程同名目录下新建一个database_route.py文件，内容如下：
# -*- coding: utf-8 -*-
from django.conf import settings
DATABASE_MAPPING = settings.DATABASE_APPS_MAPPING
class DatabaseAppsRouter(object):
"""
A router to control all database operations on models for different
databases.
In case an app is not set in settings.DATABASE_APPS_MAPPING, the router
will fallback to the `default` database.
Settings example:
DATABASE_APPS_MAPPING = {'app1': 'db1', 'app2': 'db2'}
"""
def db_for_read(self, model, **hints):
""""Point all read operations to the specific database."""
if model._meta.app_label in DATABASE_MAPPING:
return DATABASE_MAPPING[model._meta.app_label]
return None
def db_for_write(self, model, **hints):
"""Point all write operations to the specific database."""
if model._meta.app_label in DATABASE_MAPPING:
return DATABASE_MAPPING[model._meta.app_label]
return None
def allow_relation(self, obj1, obj2, **hints):
"""Allow any relation between apps that use the same database."""
db_obj1 = DATABASE_MAPPING.get(obj1._meta.app_label)
db_obj2 = DATABASE_MAPPING.get(obj2._meta.app_label)
if db_obj1 and db_obj2:
if db_obj1 == db_obj2:
return True
else:
return False
return None
def allow_migrate(self, db, app_label, model_name=None, **hints):
# print(db, app_label, model_name, hints)
if db in DATABASE_MAPPING.values():
return DATABASE_MAPPING.get(app_label) == db
elif app_label in DATABASE_MAPPING:
return False
return None
2、在工程目录下的setting中增加如下内容：
DATABASES = {
'default': {
'ENGINE': 'django.db.backends.mysql',
'NAME': ',
'USER': '',
'PASSWORD': '',
'HOST': '',
'PORT': 3306
},
'db1':{
'ENGINE': 'django.db.backends.mysql',
'NAME': 'db1',
'USER': '',
'PASSWORD': '',
'HOST': '',
'PORT': 3306
}
'db2':{
'ENGINE': 'django.db.backends.mysql',
'NAME': 'db2',
'USER': '',
'PASSWORD': '',
'HOST': '',
'PORT': 3306
}
}
DATABASE_ROUTERS = ['工程名.database_router.DatabaseAppsRouter']
DATABASE_APPS_MAPPING = {
'app1': 'db1',
'app2': 'db2',
}
3、执行
python manage.py makemigration app1
python manage.py migrate mvp --database=db1
python manage.py makemigration app2
python manage.py migrate mvp --database=db2
4、导出数据
python manage.py dumpdata app1 --database=app1_db >app1_data.json(注意app1_db指的是setting中的db1标题，不是指数据库名)
5、导入数据
python manage.py loaddata data.json --database=app1_db
