Javascript 使用节点JS解析JSON数组时出现问题
Node JS和Express新手,目前需要在Node中构建一个小型概念验证API 由于不知道如何最好地解析JSON数组以检索所需数据,从而通过“发送方id”选择适当的消息,目前遇到了一些问题 我已经能够使它与非数组数据一起工作,但无法使它与数组中的数据一起工作 当前用于非数组的代码如下所示。任何关于如何解决这个问题的建议都将不胜感激 JSONJavascript 使用节点JS解析JSON数组时出现问题,javascript,arrays,json,node.js,express,Javascript,Arrays,Json,Node.js,Express,Node JS和Express新手,目前需要在Node中构建一个小型概念验证API 由于不知道如何最好地解析JSON数组以检索所需数据,从而通过“发送方id”选择适当的消息,目前遇到了一些问题 我已经能够使它与非数组数据一起工作,但无法使它与数组中的数据一起工作 当前用于非数组的代码如下所示。任何关于如何解决这个问题的建议都将不胜感激 JSON { "data_type": "edijson", "payload": { "invoices": [{"invoi
{
"data_type": "edijson",
"payload": {
"invoices": [{"invoice_6582":
{
"sender_id": 5060043358032,
"buyer_id" : 5055185400478,
"message_ref": 135353677,
"document_type": "Commercial",
"document_name": "MRCHI",
"document_no": 6582,
"state": "partial",
"total_amount": 1008.00,
"paid_at": "null",
"invoice_date": "2012-01-30T00:00:00",
"tax_date": "2012-01-30T00:00:00",
"amount_due": 1008.00,
"invoice_no": "6582",
"order_no": 9899073,
"supplier_no": "5060043358032",
"delivery_party" : 5010251999898,
"vat_reg": 793728185,
"charges": [
{
"created_at": "20120130",
"item_id": 5010251685524,
"item_qty": 140,
"unit_price": 7.20,
"vat_type": "VAT",
"vat_rate": 20.00,
"currency_id" : "GBP",
"total_amont": 1008.00,
"type": "Charge"
}],
"totals": [
{
"invoice_amount": 1008.00,
"total_amount": 1008.00,
"tax_amount": 201.60,
"taxable_amount": 1008.00,
"allowances": 0.00
}
]
}
}
,
{"invoice_6788":
{
"sender_id": 5060043358032,
"buyer_id" : 5055185400478,
"message_ref": 10636000100020,
"document_type": "Commercial",
"document_name": "MRCHI",
"document_no": 6582,
"state": "partial",
"total_amount": 1008.00,
"paid_at": "null",
"invoice_date": "2012-01-30T00:00:00",
"tax_date": "2012-01-30T00:00:00",
"amount_due": 1008.00,
"invoice_no": "6788",
"order_no": 9899073,
"supplier_no": "5060043358032",
"delivery_party" : 5010251999898,
"vat_reg": 793728185,
"charges": [
{
"created_at": "20120130",
"item_id": 5010251685524,
"item_qty": 140,
"unit_price": 7.20,
"vat_type": "VAT",
"vat_rate": 20.00,
"currency_id" : "GBP",
"total_amont": 1008.00,
"type": "Charge"
}],
"totals": [
{
"invoice_amount": 1008.00,
"total_amount": 1008.00,
"tax_amount": 201.60,
"taxable_amount": 1008.00,
"allowances": 0.00
}
]
}
}
,
{"invoice_7786":
{
"sender_id": 5060043358032,
"buyer_id" : 5055185400478,
"message_ref": 10636000100020,
"document_type": "Commercial",
"document_name": "MRCHI",
"document_no": 6582,
"state": "partial",
"total_amount": 1008.00,
"paid_at": "null",
"invoice_date": "2012-01-30T00:00:00",
"tax_date": "2012-01-30T00:00:00",
"amount_due": 1008.00,
"invoice_no": "7786",
"order_no": 9899073,
"supplier_no": "5060043358032",
"delivery_party" : 5010251999898,
"vat_reg": 793728185,
"charges": [
{
"created_at": "20120130",
"item_id": 5010251685524,
"item_qty": 140,
"unit_price": 7.20,
"vat_type": "VAT",
"vat_rate": 20.00,
"currency_id" : "GBP",
"total_amont": 1008.00,
"type": "Charge"
}],
"totals": [
{
"invoice_amount": 1008.00,
"total_amount": 1008.00,
"tax_amount": 201.60,
"taxable_amount": 1008.00,
"allowances": 0.00
}
]
}
}
,
{"invoice_4567":
{
"sender_id": 5060043358032,
"buyer_id" : 5055185400478,
"message_ref": 10636000100020,
"document_type": "Commercial",
"document_name": "MRCHI",
"document_no": 6582,
"state": "partial",
"total_amount": 1008.00,
"paid_at": "null",
"invoice_date": "2012-01-30T00:00:00",
"tax_date": "2012-01-30T00:00:00",
"amount_due": 1008.00,
"invoice_no": "4567",
"order_no": 9899073,
"supplier_no": "5060043358032",
"delivery_party" : 5010251999898,
"vat_reg": 793728185,
"charges": [
{
"created_at": "20120130",
"item_id": 5010251685524,
"item_qty": 140,
"unit_price": 7.20,
"vat_type": "VAT",
"vat_rate": 20.00,
"currency_id" : "GBP",
"total_amont": 1008.00,
"type": "Charge"
}],
"totals": [
{
"invoice_amount": 1008.00,
"total_amount": 1008.00,
"tax_amount": 201.60,
"taxable_amount": 1008.00,
"allowances": 0.00
}
]
}
}
]
}
}
节点
var express = require('express');
var app = express();
var fs = require("fs");
app.get('/v1/invoice/:sender_id', function (req, res) {
// First read existing invoices.
fs.readFile( __dirname + "/" + "Invoice.json", 'utf8', function (err, data) {
data = JSON.parse( data );
var invoice = data["invoice_" + req.params.sender_id]
console.log( invoice );
res.end( JSON.stringify(invoice));
});
})
var server = app.listen(8081, function () {
var host = server.address().address
var port = server.address().port
})
因为这是一个数组,所以可以循环遍历它
data.payload.invoices.forEach(function(invoice){
if (invoice.invoice_no === req.params.id) {
// do stuff
}
});
如果您可以发布您正在努力处理的json数据,让任何试图帮助您的人都能更清楚地了解这些数据,这可能会更加有益。否则,您是否尝试过在数组中循环并搜索数据?Hi Stuart,完整的Json添加到postHi Abhyudit,感谢您的响应,但在我的示例中,这段代码将放在哪里?在
data=Json.parse(data)之后代码>感谢Abhyudit,正在运行,但得到了节点响应“无法读取未定义”的“forEach”属性?这是因为数据没有任何称为“invoices”的键。应该是data.payload.invoicesb顺便说一下,请尝试console.log()并查看实际存在哪些键。这段代码只是一个示例,您可以有不同的键。但原则仍然是一样的。通过执行object.property
或object[“property”]