arrays - 如何解码 json 并填充到 golang 中的结构

Question

如何解码 json 并填充到结构中。就像我有 salesorder 和 salesorderdetails 结构。在 json 中，我将有 1 个 salesorder 记录和 salesorderdetails 结构的多个项目。

这是我尝试过对单个项目和多个项目进行测试的代码，但仅适用于 salesorderdetails 结构的单个记录。

Gocode:

package main

import (
    "encoding/json"
    "fmt"
)

type Order struct {
    SalesId             string `json:"sales_id"`
    Customer string `json:"customer_name"`
    TotalPrice   string `json:"totalprice"`
}
type OrderDetails struct {
    DetailId             string `json:"detail_id"`
    SalesId             string `json:"sales_id"`
    ItemName string `json:"item_name"`
    Qty   string `json:"qty"`
    Price   string `json:"price"`
}
type Temp struct {

    Salesorder Order  `json:"Salesorder"`
    Salesorderdetails OrderDetails  `json:"OrderDetails"`
}

func main() {
    jsonByteArray := []byte(`[{"Salesorder":{"sales_id":"SOO1","customer_name":"CUST1","totalprice":"200"}, "OrderDetails":{"detailid":"1","sales_id":"SOO1","item_name":"ITEM1","qty":"2","price":"100"}}]`)

   //if i use above json it is working and if i use below json its not working
//jsonByteArray := []byte(`[{"Salesorder":{"sales_id":"SOO1","customer_name":"CUST1","totalprice":"200"}, "OrderDetails":{"detailid":"1","sales_id":"SOO1","item_name":"ITEM1","qty":"2","price":"100"},{"detailid":"2","sales_id":"SOO2","item_name":"ITEM2","qty":"3","price":"200"}}]`)

    var temp []Temp
    err := json.Unmarshal(jsonByteArray, &temp)
    if err != nil {
        panic(err)
    }
    fmt.Printf("%+v\n", temp)
    fmt.Printf("%+v\n ", temp[0].Salesorder.SalesId)
}

使用多个项目时出错:

panic: invalid character '{' looking for beginning of object key string

成功使用单个项目时的输出:

[{Salesorder:{SalesId:SOO1 Customer:CUST1 TotalPrice:200} Salesorderdetails:{SalesId:SOO1 ItemName:ITEM1 Qty:2 Price:100}}]
SOO1

Fiddle:使用 salesorderdetails 中的键更新

https://play.golang.org/p/klIAoNi18r

Answer 1

您要解码的内容不是有效的 JSON。这是有效的:

{
    "Salesorder": {
        "sales_id": "SOO1",
        "customer_name": "CUST1",
        "totalprice": "200"
    },
    "OrderDetails": {
        "sales_id": "SOO1",
        "item_name": "ITEM1",
        "qty": "2",
        "price": "100"
    }
}

但是你给的是这个:

{
    "Salesorder": {
        "sales_id": "SOO1",
        "customer_name": "CUST1",
        "totalprice": "200"
    },
    "OrderDetails": {
        "sales_id": "SOO1",
        "item_name": "ITEM1",
        "qty": "2",
        "price": "100"
    },
    {   // Things become invalid here
        "sales_id": "SOO2",
        "item_name": "ITEM2",
        "qty": "3",
        "price": "200"
    }
}

看起来您正在尝试提供对象列表，在这种情况下，您需要将这些对象括在方括号 [] 中，否则您将不得不提供第二个 OrderDetails 对象它自己的键。