Question

我转而使用STREAM使用Node JS mssql繁琐的驱动程序。

箭头语法让我失去了大范围的时间范围和循环等......

我成功获取了第一个查询结果，然后将嵌套数据附加到它。然而这对我来说毫无意义

request.on('row', row => {     // so "row" is object of data in scope but how to access?

 console.log(row); // I see that I am giving it to spit out the records on each loop
 obj = extend({}, row);   // this was a hail mary move to try to copy the object from more of a global object declaration.

问题是request.on('row', row => {是一个被隔离的循环：/

SOOO，我想要做什么返回完成＆＃34; row＆＃34; ...

我有这段代码

  request.on('done', results => { 
        //  this code cannot see  "row" 

       before the arrow function etc... , I would return my data with

       res.json(mydata); // how I did in the past 
  });

完整代码

(function () {
    'use strict';
    var sql = require('mssql');
    var xconfig = require('../../config.js');
    var newConfig = xconfig.database.liberty;
    var extend = require('util')._extend;

    exports.getLibScriptQuestions = function (connection, req, res) {
        //console.log('conn',connection);

        const poolLiberty = new sql.ConnectionPool(newConfig, err => {
            var obj = "";
            var responseData = [];

            var request = new sql.Request(poolLiberty);
            request.stream = true;
            var query = 'SELECT * FROM ' +
                ' dbo.vwScriptQuestions vwsq';

            request.query(query);

            request.on('recordset', columns => {
                // emit once

            });

            request.on('row', row => {


                var requestOD = new sql.Request(poolLiberty);
                requestOD.input('QuestionId', sql.Int, row.QuestionId);
                var sqlquery = 'SELECT q.id AS QuestionId, d.* FROM ' +
                    ' Scripts.Question q ' +
                    ' JOIN Scripts.QustionDirectiveAssoc qda ON q.Id = qda.QuestionId' +
                    ' JOIN Scripts.Directives d on qda.DirectiveId = d.Id ' +
                    ' WHERE q.Id = @QuestionId';
                requestOD.query(sqlquery, (err, result) => {
                    row.directives = result.recordset;
                    //console.log('row', row)


                   //console.log(row.directives[0].Tag);
                   obj = row.directives[0].Tag;
                    //obj.push(row.directives);
                    //obj = extend({}, row.directives);
                    responseData.push(row);

                    //console.log(result.recordset);
                    //console.log('directives',row.directives);
                });
                //console.log(row);
                //

            })

            request.on('error', err => {
                // May be emitted multiple times
                console.log('err', err);
            })



            request.on('done', result => {
                console.log('done x records', result);

                console.log('request',request.query.recordsets);

                console.log(responseData);
                console.log('obj', obj)
                //res.json(vm);
                res.json(responseData);

            })


        })

        sql.on('error', err => {
            console.log('err happened', err);
        })

    }

}());

Answer 1

看看这是否是你想要达到的目的。

let responseData = [];
request.on('row', row => {
    responseData.push(row);
});

request.on('done', results => {
    res.json(responseData);
});

需要访问row =＆gt;的节点或者克隆它，但它似乎不起作用

1 个答案: