Node.js - 如何通過AJAX傳遞多個MySQL查詢參數

Question

我想完成以下函數，它通過AJAX將值作爲參數發送給查詢，後者將在用戶的屏幕上輸出報表結果而不重新加載。

如果我有一個參數只工作（datereport：「2017年6月21日」）它工作正常，我也得到了同樣的頁面結果，而無需重新加載它。

查看網址是localhost/reports

然而，當我嘗試用第二個值的工作像currencyreport沒有得到它，直到AJAX功能，當然還有後端。

EJS

<input id="datereport" class="form-control" name="datereport" value="2017-06-21"> 
<input id="currencyreport" class="form-control" name="currencyreport" value="GBP"> 

<input type="button" value="Search" class="btn btn-info mr-1" onClick="searchReport([document.getElementById('datereport').value,document.getElementById('currencyreport').value])"> 

AJAX函數從後端發送和獲取值到/

function searchReport(datereport, currencyreport) { 

    console.log(datereport) // it outputs both datereport,currencyreport values instead of the first one only ["2017-06-21","GBP"] 
    console.log(currencyreport) // it outputs undefined 
    $.ajax({ 
     url: "/reports", 
     type: "get", 
     data: $("#report-form").serialize(), 
     success: function(res) { 
      $.post("/reportsdate/" + data, function(data) { 
       // it builds GET /reports?datereport=2017-06-21&currencyreport=GBP 
       ok(data); 
      }); 
      return false; 
     }, 
     error: function(xhr, status, error) { 
      // error stuff 
     } 
    }); 
} 

// The part which takes the backend results and output in the same page without reloading 

function ok(datares) { 
    document.getElementById("results").innerHTML = Object.values(datares.data[0]) 
} 

後端

var express = require('express'); 
var router = express.Router(); 
var bodyParser = require('body-parser'); 
var url = require('url'); 

router.use(bodyParser.urlencoded({ extended: true })); 
router.use(function(req, res, next) { 
    console.log(req.method, req.url); 
    next(); 
}); 


var reports = router.route('/reports'); 
var reportsdate = router.route('/reportsdate'); 

router.get('/reportsdate', function(req, res) { 
    res.render('reports'); 
}); 

router.get('/reports', function(req, res) { 
    res.render('reports'); 
}); 

reportsdate.post(function(req, res, next) { 

    datereport = req.query.datereport; 
    currencyreport = req.query.currencyreport; 

    req.getConnection(function(err, conn) { 

     if (err) return next("Cannot Connect"); 

     var queryString = "SELECT SUM(total_profit) AS fee_total FROM transactions WHERE date_created = ?"; 
     var queryParams = []; 
     queryParams.push(datereport); 

     if(currencyreport){ 
       queryString += ' AND currency = ? '; 
       queryParams.push(currencyreport); 
     } 

     var query = conn.query(queryString, queryParams, function(err, rows) { 
      if (err) { 
       console.log(err); 
       return next(err); 
      } 
      var ab = {data: rows}; 
      console.log('hohohoho ' + JSON.stringify(ab)); 
      res.send(ab) 

     }); 
    }); 
}); 

router.get('/reports', function(req, res) { 
    res.render('reports', {data: ab}); 
}); 

Answer 1

您正在使用：

的onClick = 「searchReport（[。的document.getElementById（ 'datereport'）值，的document.getElementById（ 'currencyreport'）值]）」>

這意味着你用一個數組調用searchReport。 但是你的函數僅僅適用於變量。

所以，如果你刪除大括號一切都應該工作。

onClick="searchReport(document.getElementById('datereport').value,document.getElementById('currencyreport').value)">