Is it feasible to model general JSON arrays in a struct using Go?

Is it possible to Marshal/Unmarshal a struct in Go?

type MyType struct {
    Items    <What should be included here?>   `json:"item"`
}

An example JSON document that needs to be handled is

{"items":["value1", {"x":"y"}, "value3"]}

I am new to Go and considering imposing restrictions on the array structure. For instance, transforming the above example into:

{"items":[
    {"type":null, "value":"value1"},
    {"type":"x", "value":"y"},
    {"type":"value3", "value":"value3"}
]}

Alternatively, can I achieve my goal without restructuring the array this way?

jsonstructgo

Answer №1

It is important that your Items are in the form of an array of interfaces.

Here's an example:

Items []interface{}

For a complete example, check out this link:
http://play.golang.org/p/LOXCiSmUET

When you unmarshal your JSON data and want to iterate over your Items, it's crucial to identify the type. Keep in mind that complex types are represented as map[string]interface and not as a struct. In such cases, you will need to create the struct yourself.

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