修复多个数据库切换的bug
修复多个数据库切换的bug

Qihoo360/thinkjs,74sharlock/thinkjs,maxzhang/thinkjs,akira-cn/thinkjs,maxzhang/thinkjs,thinkjs/thinkjs,akira-cn/thinkjs,lukw00/thinkjs,snadn/thinkjs,lukw00/thinkjs,maxzhang/thinkjs,75team/thinkjs,akira-cn/thinkjs,74sharlock/thinkjs,75team/thinkjs,75team/thinkjs