Question

代码：

  checkMongoQuery(mqueries,function(data){
      message.mongo=data;     
      checkMySqlQuery(temp,function(data){
         if(data.msg==gloabl_vars.messages.success){
           message.msg==gloabl_vars.messages.success;
         }
         else{
           message.msg==gloabl_vars.messages.failed;
         }
         message.mysql=data;
         result(null,message);
       });
    });

首先将调用checkMongoQuery函数，然后在两者均成功执行时执行checkMySqlQuery函数，它将返回result方法。在结果方法中，它抛出一个错误，指出“重新引发非mysql错误”。请让我知道上面代码中的问题在哪里。预先感谢。

错误跟踪：

E:\nodeapi\node_modules\mysql\lib\protocol\Parser.js:80
        throw err; // Rethrow non-MySQL errors
        ^

Error: Can't set headers after they are sent.
    at validateHeader (_http_outgoing.js:491:11)
    at ServerResponse.setHeader (_http_outgoing.js:498:3)
    at ServerResponse.header (E:\nodeapi\node_modules\express\lib\response.js:76
7:10)
    at ServerResponse.send (E:\nodeapi\node_modules\express\lib\response.js:170:
12)
    at ServerResponse.json (E:\nodeapi\node_modules\express\lib\response.js:267:
15)
    at E:\nodeapi\api\controllers\appController.js:96:11
    at E:\nodeapi\api\models\appModel.js:141:10
    at Query.<anonymous> (E:\nodeapi\api\models\appModel.js:193:9)
    at Query.<anonymous> (E:\nodeapi\node_modules\mysql\lib\Connection.js:502:10
)
    at Query._callback (E:\nodeapi\node_modules\mysql\lib\Connection.js:468:16)
[nodemon] app crashed - waiting for file changes before starting...

Node.js中的回调函数出现Mysql错误

0 个答案: