golang中的扩展方法？

Question

I am a .NET guy. Very much new to the Go language.

In .NET we have extension methods. Is there anything equivalent in Go?

In .NET I will do like bsonTrans["trans.ticket"]

in that bsonTrans => bson document

    "trans.ticket" => key in json

     trans is outer level and

     ticket is inner level

I am using native mongodb driver. In that I add my extension functions to perform these operations.

Like wise up to the nth level I did it .NET.

I would like to apply the same logic in Go.

Example

 b := []byte(trans)
var config map[string]interface{}
err := json.Unmarshal(b, &config)

fmt.Println(config["data"].(map[string] interface{})["issued"])

For instance in that example, can i do something like:

config["data.issued"] which should give the value in return ?

Please help me in figuring this out...

Actual json :-

(The actual json is too big, however I am providing a sample of it with less fields.)

{
 "_id" : 2001,
    "address" : {
        "line1" : "",
        "line2" : "",
        "line3" : ""
       },
    "tickets" : [ 
        {
            "seq" : 2,
            "add" : [
              {
              "seq" : "",
              "amnt" : 50
              },

              {
              "seq" : "",
              "amnt" : 50
              {
              "seq" : "",
              "amnt" : 50
              }
              }

              }
             ]
}

Reason for not using struct is my json has too many nested structures and I have more than 10 schemas with different structures.

So I left out structs.

I admit that I am not sure that omitting structs is the best way.

Answer 1

Extension methods are not supported the way it is in .NET.

The closest thing you can do is create a type from string and create a method on that type:

type MyString string
func (m *MyString) Method() {
}

func main() {
    var s MyString = ""
    s.Method()
}