最近做的工程要修改成两个数据库的，一个测试数据库， 一个线上数据库。
所以就要把原来的只有一个数据库的改成两个数据库。
第一步：修改development.ini
# SQLAlchemy database URL
sqlalchemy.test.url = mysql://username:password@host:port/database
sqlalchemy.test.pool_recycle = 3600
sqlalchemy.online.url = mysql://username:password@host:port/database
sqlalchemy.online.pool_recycle = 3600
一个测试数据库，一个线上数据库
第二步：修改config/envirment.py
# Setup the SQLAlchemy database engine
test_engine = engine_from_config(config, 'sqlalchemy.test.')
online_engine = engine_from_config(config, 'sqlalchemy.online.')
init_model(test_engine, online_engine)
第三步：修改model/meta.py
"""SQLAlchemy Metadata and Session object"""
from sqlalchemy.ext.declarative import declarative_base
from sqlalchemy.orm import scoped_session, sessionmaker
__all__ = ['BaseTest', 'BaseOnline', 'Session']
# SQLAlchemy session manager. Updated by model.init_model()
Session = scoped_session(sessionmaker())
# The declarative Base
BaseTest = declarative_base()
BaseOnline = declarative_base()
第四步：修改model/__init__.py
"""The application's model objects"""
from hello.model.meta import Session, BaseTest, BaseOnline
from hello.model.template_test import Template_test
from hello.model.template_online import Template_online
def init_model(test_engine, online_engine):
"""Call me before using any of the tables or classes in the model"""
meta.BaseTest.metadata.bind = test_engine
meta.BaseOnline.metadata.bind = online_engine
第五步：修改model/的多个表文件
from sqlalchemy import Column
from sqlalchemy import types
from hello.model.meta import BaseTest
class Template_test(BaseTest):
__tablename__ = "template"
第六步：修改controller
根据model中表的情况修改controller的文件头
from hello.model.template_test import Template_test