将两个JSON对象中的值连接到Go中的map [string] bool中

Question

I am trying to concatenate two values, door and access, from a JSON object into a map[string]bool, which is declared inside a struct. Right now, I am getting the error:

json: cannot unmarshal string into Go struct field Data.pasted of type map[string]bool

The struct is defined as follows:

type AccessControl struct{
    SessionId string `json:"sessionId"`
    DoorAccess map[string]bool 
} 

The JSON object I am getting from the server is:

{
    "sessionId": "232",
    "door": "Main Door",
    "access": true
}

And this is my function:

func handler(w http.ResponseWriter, r *http.Request){
    var data AccessControl
    err := json.NewDecoder(r.Body).Decode(&data)
}

Answer 1

your json and your struct are not representing the same object your struct should be as follows:

    type AccessControl struct {
    SessionID string `json:"sessionId"`
    Door      string `json:"door"`
    Access    bool   `json:"access"`
    }

and for the "full example" that you asked for:

type ServerAccessControl struct {
    SessionID string `json:"sessionId"`
    Door      string `json:"door"`
    Access    bool   `json:"access"`
}

type AccessControl struct {
    SessionId  string `json:"sessionId"`
    DoorAccess map[string]bool
}

func main() {
    jsn := `{ "sessionId": "232", "door": "Main Door", "access": true }`
    var data ServerAccessControl
    json.Unmarshal([]byte(jsn), &data)
    accessControl := ServerAccessControlToAccessControl(&data)
    fmt.Println(accessControl)

}

//ServerAccessControlToAccessControl convert a access control obj from the server into a map based struct.
func ServerAccessControlToAccessControl(fromServer *ServerAccessControl) AccessControl {
    var accessControl AccessControl
    accessControl.SessionId = fromServer.SessionID
    accessControl.DoorAccess = make(map[string]bool)
    accessControl.DoorAccess[fromServer.Door] = fromServer.Access
    return accessControl
}

I created the ServerAccessControl struct which represent the json that you are getting from the server and the Access Control class as you wanted it.

It is important that you will notice that you are not getting a collection from the server, and if you plan to add more doors into your map, you will need to implement the logic your self.