[英]Getting data out of a JSON object in node js?
I am trying to extract data from a JSON object by passing field names but then I get the undefined results when I try to extract data . 我试图通过传递字段名称从JSON对象中提取数据,但是当我尝试提取数据时却得到了未定义的结果。 For some reason the way I am getting the JSON Object is not the way I expected. 由于某种原因,我获取JSON对象的方式不是我期望的方式。 What could be the error? 可能是什么错误?
JS code - JS代码-
function initfunc() {
$.ajax({
type: "POST",
contentType: "application/json; charset=utf-8",
url: "/dashboard",
data: JSON.stringify({country: country[counter], bankid: bankid[counter]}),
dataType: "json",
success: function (Result) {
Result = Result.Resultset
// console.log("result", Result);
// console.log("result",Result);
var data = [];
var merchantname = [];
var successtranscs = [];
var failedtranscs = [];
var servicetranscs = [];
var bankname;
console.log("result",Result);
for(var i in Result) {
merchantname.push(Result[i].MERCHANTNAME); // or .MERCHANTNAME?
successtranscs.push(Result[i].NO_OF_SUCCESSFUL_TRANSACTIONS); // or .NO_OF_SUCCESSFUL_TRANSACTIONS?
failedtranscs.push(Result[i].NO_OF_FAILED_BANK_TRANSACTIONS); // or .NO_OF_FAILED_BANK_TRANSACTIONS?
servicetranscs.push(Result[i].NO_OF_FAILED_SERVICE_TRANSACTIONS); // or .NO_OF_FAILED_SERVICE_TRANSACTIONS?
bankname = Result[i].BankName; // or .BankName?
}
//console.log("merchantname",merchantname);
StackedChart(bankname, merchantname, successtranscs, failedtranscs, servicetranscs);
merchantname = [];
successtranscs = [];
failedtranscs = [];
servicetranscs = [];
rows = null;
if (counter == country.length - 1) {
counter = -1;
counter++;
}
else {
counter++;
}
}
});
}
server.js - server.js-
app.post('/dashboard', function (req, res) {
cnn.TransactionInfo(req.body.country,req.body.bankid, function (err, result) {
var resultset = {"Result":result};
console.log(resultset);
res.send({ Resultset : resultset });
});
});
Initial Result set from stored procedure - resultset- 存储过程的初始结果集-resultset-
{ Result:
[ { BankName: 'IM BANK',
MERCHANTNAME: 'MPesa',
NO_OF_SUCCESSFUL_TRANSACTIONS: 29,
NO_OF_FAILED_BANK_TRANSACTIONS: 0,
NO_OF_FAILED_SERVICE_TRANSACTIONS: 4 },
{ BankName: 'IM BANK',
MERCHANTNAME: 'Zuku',
NO_OF_SUCCESSFUL_TRANSACTIONS: 1,
NO_OF_FAILED_BANK_TRANSACTIONS: 0,
NO_OF_FAILED_SERVICE_TRANSACTIONS: 0 },
{ BankName: 'IM BANK',
MERCHANTNAME: 'BALANCE',
NO_OF_SUCCESSFUL_TRANSACTIONS: 21,
NO_OF_FAILED_BANK_TRANSACTIONS: 0,
NO_OF_FAILED_SERVICE_TRANSACTIONS: 0 },
{ BankName: 'IM BANK',
MERCHANTNAME: 'AIRTEL',
NO_OF_SUCCESSFUL_TRANSACTIONS: 2,
NO_OF_FAILED_BANK_TRANSACTIONS: 0,
NO_OF_FAILED_SERVICE_TRANSACTIONS: 0 },
{ BankName: 'IM BANK',
MERCHANTNAME: 'SAFARICOM',
NO_OF_SUCCESSFUL_TRANSACTIONS: 4,
NO_OF_FAILED_BANK_TRANSACTIONS: 0,
NO_OF_FAILED_SERVICE_TRANSACTIONS: 0 },
{ BankName: 'IM BANK',
MERCHANTNAME: 'FIXEDDEPOSIT',
NO_OF_SUCCESSFUL_TRANSACTIONS: 1,
NO_OF_FAILED_BANK_TRANSACTIONS: 0,
NO_OF_FAILED_SERVICE_TRANSACTIONS: 0 },
{ BankName: 'IM BANK',
MERCHANTNAME: 'FOREX',
NO_OF_SUCCESSFUL_TRANSACTIONS: 1,
NO_OF_FAILED_BANK_TRANSACTIONS: 0,
NO_OF_FAILED_SERVICE_TRANSACTIONS: 0 },
{ BankName: 'IM BANK',
MERCHANTNAME: 'KITSA2P',
NO_OF_SUCCESSFUL_TRANSACTIONS: 1,
NO_OF_FAILED_BANK_TRANSACTIONS: 0,
NO_OF_FAILED_SERVICE_TRANSACTIONS: 0 },
{ BankName: 'IM BANK',
MERCHANTNAME: 'STATEMENT',
NO_OF_SUCCESSFUL_TRANSACTIONS: 2,
NO_OF_FAILED_BANK_TRANSACTIONS: 0,
NO_OF_FAILED_SERVICE_TRANSACTIONS: 0 },
{ BankName: 'IM BANK',
MERCHANTNAME: 'TRANSFER',
NO_OF_SUCCESSFUL_TRANSACTIONS: 1,
NO_OF_FAILED_BANK_TRANSACTIONS: 0,
NO_OF_FAILED_SERVICE_TRANSACTIONS: 0 } ] }
This is what I get after sending the data to my client script - The resultset becomes - 这是将数据发送到客户端脚本后得到的结果-结果集变为-
result:
Object
Result
:
Array[9]
0
:
Object
BankName
:
"IM BANK"
MERCHANTNAME
:
"MPesa"
NO_OF_FAILED_BANK_TRANSACTIONS
:
0
NO_OF_FAILED_SERVICE_TRANSACTIONS
:
2
NO_OF_SUCCESSFUL_TRANSACTIONS
:
25
You should do this at the backend while sending data to frontend 您应该在向前端发送数据时在后端执行此操作
res.json(resultset);
while receiving at frontend, 在前端接收时
console.log("result",JSON.stringify(Result)); //to display in string format
also, you will get the data in the desired format to push it into arrays as you want 同样,您将获得所需格式的数据,以根据需要将其推入数组
USERS.JSON USERS.JSON
{
"user1" : {
"name" : "mahesh",
"password" : "password1",
"profession" : "teacher",
"id": 1
},
"user2" : {
"name" : "suresh",
"password" : "password2",
"profession" : "librarian",
"id": 2
},
"user3" : {
"name" : "ramesh",
"password" : "password3",
"profession" : "clerk",
"id": 3
}
}
Code 码
var express = require('express');
var app = express();
var fs = require("fs");
app.get('/listUsers', function (req, res) {
fs.readFile(__dirname + "/" + "users.json", 'utf8', function (err, data) {
console.log(data);
res.end(data);
});
})
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