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Question

美好的一天，我如何计算公共功能以路由并在邮递员上进行检查？这是我的代码

router.post('/post_regular_hours/:employee_id/',function(request,response,next){
    var id = request.params.employee_id;
    var time_in = request.params.time_in;
    var time_out = request.params.time_out;
    // const timein = request.params.time_in;
    // const timeout = request.params.time_out;
    knexDb.select('*')
            .from('employee_attendance')
            .where('employee_id',id)
            .then(function(result){
                res.send(compute_normal_hours(response,result,diff))

            })
});
function compute_normal_hours(res,result,diff){
    let time_in = moment(time_in);
    let time_out = moment(time_out);

    let diff = time_out.diff(time_in, 'hours');

    return diff;
}

我希望差异能够在邮递员上发布这是我的代码的app.js。如何将来自MySQL查询的数据调用到函数并在路由器帖子上返回计算数据还是你们可以为此提供正确的术语。

var express = require('express');
var mysql= require('mysql');
var employee = require('./routes/employee');
var time_record = require('./routes/time_record');
var admin_employee = require('./routes/admin_employee');
var tar = require('./routes/tar');
var Joi = require('joi');
var app = express();

app.get('/hello',function(req,res){
  var name = "World";
  var schema = {
      name: Joi.string().alphanum().min(3).max(30).required()
  };
  var result = Joi.validate({ name : req.query.name }, schema);
  if(result.error === null)
  {
     if(req.query.name && req.query.name != '')
    {
      name = req.query.name;
    }
    res.json({
      "message" : "Hello "+name + "!"
    });
  }
  else
  {
    res.json({
      "message" : "Error"
    });
  }
}); 

//Database connection
app.use(function(req, res, next){
    global.connection = mysql.createConnection({
        host     : 'locahost',
        user     : 'dbm_project',
      password : 'dbm1234',
        database : 'dbm_db'
    });
    connection.connect();
    next();
});
app.use('/', employee);
app.use('/employee', time_record);
app.use('/admin', admin_employee);
app.use('/tar', tar);
// catch 404 and forward to error handler
app.use(function(req, res, next) {
  var err = new Error('Not Found');
  err.status = 404;
  next(err);
});

// error handler
app.use(function(err, req, res, next) {
  // set locals, only providing error in development
  res.locals.message = err.message;
  res.locals.error = req.app.get('env') === 'development' ? err : {};
  // render the error page
  res.status(err.status || 500);
  res.render('error');
});
app.listen(8000,function(){
  console.log("App started on port 8000!");
});
module.exports = app;

这是我代码的app.js。如何将MySQL查询的数据调用到函数，并在路由器po

Answer 1

您的代码有一些问题。请参阅各自代码块中的说明。

router.post('/post_regular_hours/:employee_id/',function(request,response,next){
    // If you're receiving a post request
    // you'll probably want to check the body for these parameters.
    let id = request.params.employee_id; // make sure the param names are matching with what you post.
    // This one is special because you are passing it through the url directly
    let time_in = request.body.time_in;
    let time_out = request.body.time_out;        
    knexDb.select('*')
            .from('employee_attendance')
            .where('employee_id',id)
            .then(function(result){
                // you are not sending time_in and time_out here - but difference. but difference is not calculated.
                // changed the function signature a bit - you weren't using the result at all? leaving this callback here because I'm sure you want to map the used time to some user?
                return response.send(compute_normal_hours(time_in, time_out))
            });
});
// this function was (and still might be) incorrect.
// You were passing res and result which neither of them you were using.
// You also had time_in and time_out which were going to be undefined in the function scope. Now that we are passing them in it should be ok. Updated it so you don't have the params you don't need.
function compute_normal_hours(time_in, time_out){
    // What was diff - if it's the time difference name things correctly
    // You had a diff parameter passed in (which you didn't compute), a diff function called below and another variable declaration called diff.
    // you were not passing time_in or time_out parameters.
    // you have moment here - are you using a library?
    let time_in = moment(time_in);
    let time_out = moment(time_out);
    let diff = time_out.diff(time_in, 'hours');
    return `Computed result is: ${diff}`;    
}

重要编辑

请搜索Res.Render（Response.Render）的所有出现，然后用Res.Send -res.Render替换它们正在寻找模板引擎