Golang中的嵌套json如何解组为简单的json对象？
来源：stackoverflow
时间：2024-02-08 09:36:24 232浏览 收藏
最近发现不少小伙伴都对Golang很感兴趣，所以今天继续给大家介绍Golang相关的知识，本文《Golang中的嵌套json如何解组为简单的json对象？》主要内容涉及到等等知识点，希望能帮到你！当然如果阅读本文时存在不同想法，可以在评论中表达，但是请勿使用过激的措辞~
问题内容
嗨，我需要一些帮助，我来自nodejs，正在寻找一种方法来解组嵌套的json，使其成为简单的json对。 这是我的嵌套 json 的示例。
{
"id": 1000004,
"reference": "t0000",
"amount": 700000,
"paid_at": "2022-07-24t00:49:13.000z",
"created_at": "2022-07-24t00:49:08.000z",
"metadata": {
"custom_fields": [
{
"display_name": "meternumber",
"value": "123456789"
},
{
"display_name": "accountnumber",
"value": "123456"
}
]
}
}
我想实现这个：
{
"id": 1000004,
"reference": "t0000",
"amount": 700000,
"paid_at": "2022-07-24t00:49:13.000z",
"created_at": "2022-07-24t00:49:08.000z",
"meter_number": "123456789",
"account_number": "123456",
}
它曾经是一个深根嵌套的有效负载，我已经使用结构类型来隔离相关的对和数组，但它仍然不是我需要传递到数据库的格式。 指针和更正将不胜感激。
如何将嵌套的 json 解组为简单的 json 对 golang？
这是原始数据
data = []byte(`{
"status": true,
"message": "transactions retrieved",
"data": [
{
"id": 10000000,
"domain": "test",
"status": "success",
"reference": "t0000000000",
"amount": 700000,
"message": null,
"gateway_response": "successful",
"paid_at": "2022-07-24t00:49:13.000z",
"created_at": "2022-07-24t00:49:08.000z",
"channel": "card",
"currency": "ngn",
"ip_address": "102.89.32.12",
"metadata": {
"custom_fields": [
{
"display_name": "meternumber",
"variable_name": "meternumber",
"value": "123456789"
},
{
"display_name": "accountnumber",
"variable_name": "accountnumber",
"value": "123456"
}
],
"referrer": "https://example.com/"
},
"log": {
"start_time": 1658623749,
"time_spent": 4,
"attempts": 1,
"errors": 0,
"success": true,
"mobile": false,
"input": [],
"history": [
{
"type": "action",
"message": "attempted to pay with card",
"time": 2
},
{
"type": "success",
"message": "successfully paid with card",
"time": 4
}
]
},
"fees": 20500,
"fees_split": null,
"customer": {
"id": 87000000,
"first_name": "foo",
"last_name": "foo",
"email": "[email protected]",
"phone": "08090000000",
"metadata": null,
"customer_code": "cus_foo",
"risk_action": "default"
},
"authorization": {
"authorization_code": "auth_foo",
"bin": "40123456789",
"last4": "40000",
"exp_month": "12",
"exp_year": "2030",
"channel": "card",
"card_type": "visa ",
"bank": "test bank",
"country_code": "ng",
"brand": "visa",
"reusable": true,
"signature": "sig_foo",
"account_name": null
},
"plan": {},
"split": {},
"subaccount": {},
"order_id": 800000,
"paidat": "2022-07-24t00:49:13.000z",
"createdat": "2022-07-24t00:49:08.000z",
"requested_amount": 700000,
"source": {
"source": "checkout",
"type": "web",
"identifier": null,
"entry_point": "request_inline"
},
"pos_transaction_data": null
},
{
"id": 1000000,
"domain": "test",
"status": "success",
"reference": "t13456789",
"amount": 500000,
"message": null,
"gateway_response": "successful",
"paid_at": "2022-07-24t00:28:34.000z",
"created_at": "2022-07-24t00:28:08.000z",
"channel": "card",
"currency": "ngn",
"ip_address": "192.168.1.1",
"metadata": {
"custom_fields": [
{
"display_name": "meternumber",
"variable_name": "meternumber",
"value": "123456789"
},
{
"display_name": "accountnumber",
"variable_name": "accountnumber",
"value": "123456"
}
],
"referrer": "https://example.com"
},
"log": {
"start_time": 1658622488,
"time_spent": 26,
"attempts": 1,
"errors": 0,
"success": true,
"mobile": false,
"input": [],
"history": [
{
"type": "action",
"message": "set payment method to: bank",
"time": 15
},
{
"type": "action",
"message": "set payment method to: ussd",
"time": 16
},
{
"type": "action",
"message": "set payment method to: bank",
"time": 19
},
{
"type": "action",
"message": "set payment method to: card",
"time": 22
},
{
"type": "action",
"message": "attempted to pay with card",
"time": 25
},
{
"type": "success",
"message": "successfully paid with card",
"time": 26
}
]
},
"fees": 17500,
"fees_split": null,
"customer": {
"id": 870000000,
"first_name": "foo",
"last_name": "foo",
"email": "[email protected]",
"phone": "0809000000",
"metadata": null,
"customer_code": "cus_xxxx",
"risk_action": "default"
},
"authorization": {
"authorization_code": "auth_xxxx",
"bin": "400000",
"last4": "40000",
"exp_month": "12",
"exp_year": "2030",
"channel": "card",
"card_type": "visa ",
"bank": "test bank",
"country_code": "ng",
"brand": "visa",
"reusable": true,
"signature": "xxxxxx",
"account_name": null
},
"plan": {},
"split": {},
"subaccount": {},
"order_id": 827512,
"paidat": "2022-07-24t00:28:34.000z",
"createdat": "2022-07-24t00:28:08.000z",
"requested_amount": 500000,
"source": {
"source": "checkout",
"type": "web",
"identifier": null,
"entry_point": "request_inline"
},
"pos_transaction_data": null
}
],
"meta": {
"total": 2,
"total_volume": 12000,
"skipped": 0,
"perpage": 50,
"page": 1,
"pagecount": 1
}
}`)
这就是我所做的：
type Uservariabledata struct {
//json.RawMessage `json:"custom_field"`
Display_name string `json:"display_name"`
Value string `json:"value"`
}
// struct
type UserDataDetail struct {
Custom_fields []Uservariabledata
}
// struct
type UserData struct {
Id int `json:"id"`
Reference string `json:"reference"`
Amount uint `json:"amount"`
Paid_at string `json:"paid_at"`
Created_at string `json:"created_at"`
Metadata UserDataDetail
}
// Payload struct
type Payload struct {
Status bool `json:"status"`
Message string `json:"message"`
Data []UserData
Meta json.RawMessage `json:"meta"`
}
func (p *Payload) UnmarshalJSON(data []byte) error {
type payload struct {
Status bool `json:"status"`
Message string `json:"message"`
Data []UserData
Meta json.RawMessage `json:"meta"`
}
payld := &payload{}
err := json.Unmarshal(data, payld)
if err != nil {
return err
}
p.Status = payld.Status
p.Message = payld.Message
p.Data=payld.Data
p.Meta=payld.Meta
return nil
}
// GetUserAmountPaid endpoint, this was done in my controller.go
func GetUserAmountPaid(c echo.Context) (err error) {
respData := Data
payld := Payload{}
err = json.Unmarshal(respData, &payld)
if err != nil {
panic(err)
}
return c.JSON(http.StatusOK, payld.Data)
}正确答案
您主要已经确定您希望为“真实数据”和“传输数据”拥有单独的结构。
type realdata struct {
id int `json:"id"`
...
meternumber string `json:"meter_number"`
accountnumber string `json:"account_number"`
}
诀窍在于您的“传输数据”不太正确，它需要与正在解析的 json 的格式相匹配。
type transferdata struct {
id int
// ...
metadata struct {
custom_fields []struct{
display_name string
variable_name string
value string
}
}
}
然后只需解组为“传输数据”类型的对象并将其复制到“真实数据”中即可。
func (realData *RealData) UnmarshalJSON(data []byte) error {
var transferData TransferData
err := json.Unmarshal(data, &transferData)
if err != nil {
return err
}
realData.Id = transferData.Id
// ...
// Now we must cherry-pick the known custom metadata fields we
// care about into the desired fields of our real data.
for _, cf := range transferData.Metadata.Custom_fields {
switch cf.Display_name {
case "MeterNumber":
realData.MeterNumber = cf.Value
case "AccountNumber":
realData.AccountNumber = cf.Value
}
}
return nil
}到这里，我们也就讲完了《Golang中的嵌套json如何解组为简单的json对象？》的内容了。个人认为，基础知识的学习和巩固，是为了更好的将其运用到项目中，欢迎关注golang学习网公众号，带你了解更多关于的知识点！
声明：本文转载于：stackoverflow 如有侵犯，请联系study_golang@163.com删除
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