如何将对象存储在结构中

Question

I'm not sure how to create a struct to store a JSON object that is being posted to my API.

The JSON looks like this:

{ 
    "name" : "Mr Robinson",
    "email" : "[e-mail]",
    "username" : "robbo123",
    "properties" : {
        "property1" : "a property",
        "property2" : "another property"
    },
    "permissions" : ["perm1", "perm2", "perm3"]
}

There can be any number of properties and the permissions array can contain any number of values.

I am using this to decode the posted values:

err := json.NewDecoder(req.Body).Decode(my_struct)

So far my struct looks like this:

type User struct {
    Name      string      `json:"name"`
    Email     string      `json:"email"`
    Username  string      `json:"username"`
}

Answer 1

You can use a map[string]string for the properties and a []string slice for the permissions:

type User struct {
    Name        string            `json:"name"`
    Email       string            `json:"email"`
    Username    string            `json:"username"`
    Properties  map[string]string `json:"properties"`
    Permissions []string          `json:"permissions"`
}

Output (wrapped):

{Name:Mr Robinson Email:[e-mail] Username:robbo123 
    Properties:map[property1:a property property2:another property]
    Permissions:[perm1 perm2 perm3]}

Try the complete runnable app on the Go Playground.