英文:
How I can write the value of mongo objectid in json string in golang
问题
objectid始终是唯一且不可预测的。我希望这个变量应该取primitive.NewObjectID.Hex()的值。
var mockData = `{"status":201,"message":"用户创建成功！","data":{"data":"{"InsertedID":primitive.NewObjectID().Hex()}"}}`
但是像这样写会使输出变成一个普通的字符串。
英文:
The objectid is always unique and unpredictable. I want that, this var should take value of primitive.NewObjectID.Hex()
var mockData = `{"status":201,"message":"User Created Successfully!","data":{"data":"{"InsertedID":primitive.NewObjectID().Hex()}"}}`
But writing it like this gives me a straight string in output.
答案1
得分: 1
你需要“打破”字符串字面量，并使用+进行连接：
var mockData = `{"status":201,"message":"User Created Successfully!","data":{"data":{"InsertedID":"` + primitive.NewObjectID().Hex() + `"}}}`
这样做是可行的，因为十六进制对象ID在JSON中不需要特殊转义，但通常情况下，你应该使用encoding/json包生成有效的JSON（它知道正确的转义方式）。
使用encoding/json包，代码可能如下所示：
var s struct {Status int `json:"status"`Message string `json:"message"`Data struct {Data struct {InsertedID string} `json:"data"`} `json:"data"`}s.Status = 201s.Message = "User Created Successfully!"s.Data.Data.InsertedID = primitive.NewObjectID().Hex()out, err := json.Marshal(s)if err != nil {panic(err)}fmt.Println(string(out))
你可以在Go Playground上尝试这些示例。
英文:
You have to "break" the string literal and concatenate the parts using +:
var mockData = `{"status":201,"message":"User Created Successfully!","data":{"data":{"InsertedID":"` + primitive.NewObjectID().Hex() + `"}}}`
This will work because the hex object ID does not need any special escaping in JSON, but in general you should use the encoding/json package to generate valid JSON (which knows about proper escaping).
Using the encoding/json package this is how it could look like:
var s struct {Status int `json:"status"`Message string `json:"message"`Data struct {Data struct {InsertedID string} `json:"data"`} `json:"data"`}s.Status = 201s.Message = "User Created Successfully!"s.Data.Data.InsertedID = primitive.NewObjectID().Hex()out, err := json.Marshal(s)if err != nil {panic(err)}fmt.Println(string(out))
Try the examples on the Go Playground.
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