Question

cherrypy.engine subscribe()是一个连接数据库的函数，这个cherrypy.engine start()订阅了该数据库。

如果我想从不同的数据库中获取多组数据，我需要连接到不同的数据库。

在没有太多代码更改的情况下，有没有办法在CherryPy中执行此操作？

Answer 1

您需要使用2个游标或至少初始化相同的游标两次。尝试这样的事情......

import cherrypy 
import MySQLdb 

def connect(thread_index): 
    # Create a connection and store it in the current thread 
    cherrypy.thread_data.db = MySQLdb.connect('host', 'user', 'password', 'dbname') 
    cherrypy.thread_data.db2 = MySQLdb.connect('host', 'user', 'password', 'dbname2') 

# Tell CherryPy to call "connect" for each thread, when it starts up 
cherrypy.engine.subscribe('start_thread', connect)


class Root: 
    def index(self): 
        # Sample page that displays the number of records in "table" 
        # Open a cursor, using the DB connection for the current thread 
        c = cherrypy.thread_data.db.cursor() 
        c.execute('select count(*) from table') 
        res = c.fetchone() 
        c.close() 

        c = cherrypy.thread_data.db2.cursor() 
        c.execute('select count(*) from table2') 
        res = c.fetchone() 
        return "<html><body>Hello, you have %d records in your table</body></html>" % res[0] 
    index.exposed = True 

cherrypy.quickstart(Root())

希望这有帮助！

我可以连接到CherryPy中的多个数据库吗？

1 个答案: