How can I pass the entire json string to a field of a nested structure when unmarshalling?

In PHP, when we need to pass the entire JSON string to a field of a nested structure, there is an easy way to do it. First, we need to make sure we have decoded the JSON string into a PHP array or object. We can then use the json_encode() function to encode the decoded array or object into a JSON string again. Next, we can assign the encoded JSON string to the target field. In this way, we have successfully passed the entire JSON string to the fields of the nested structure. This is a simple yet effective method that allows us to easily process JSON data in PHP.

Question content

I need to unmarshal a flat json string

data := `{"login":"Nickname","password":"some_pass","newPassword":"new_pass"}`

EnterUpdatePasswordRequestNested structure:

type SignInRequest struct {
    Login    string `json:"login"`
    Password string `json:"password"`
}

type UpdatePasswordRequest struct {
    NewPassword string        `json:"newPassword"`
    SignInData  SignInRequest `<tag>`
}

Unmarshal data using all possible <tag> values ​​into result

var result UpdatePasswordRequest
json.Unmarshal([]byte(data), &result)

Give empty Login and Password:

result.SignInData.Login = ""
result.SignInData.Password = ""

How should I define <tag> to get the correct values ​​for the Login and Password fields?

Workaround

If you want to use the name of <tag>, your json should be nested, not flat, like this:

data := `{"newPassword":"new_pass", "myTag":{"password":"some_pass", "login":"Nickname"}}`

If you can't change your json, the structure (aka .struct embedding) should be composed like this:

type SignInRequest struct {
    Login    string `json:"login"`
    Password string `json:"password"`
}

type UpdatePasswordRequest struct {
    NewPassword string        `json:"newPassword"`
    SignInRequest
}

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