go - function for converting a struct to map in Golang

Question

I want to convert a struct to map in Golang. It would also be nice if I could use the JSON tags as keys in the created map (otherwise defaulting to field name).

Edit Dec 14, 2020

Since structs repo was archived, you can use mapstructure instead.

Edit TL;DR version, Jun 15, 2015

If you want the fast solution for converting a structure to map, see the accepted answer, upvote it and use that package.

Happy coding! :)

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Original Post

So far I have this function, I am using the reflect package but I don't understand well how to use the package, please bear with me.

func ConvertToMap(model interface{}) bson.M {
    ret := bson.M{}

    modelReflect := reflect.ValueOf(model)

    if modelReflect.Kind() == reflect.Ptr {
        modelReflect = modelReflect.Elem()
    }

    modelRefType := modelReflect.Type()
    fieldsCount := modelReflect.NumField()

    var fieldData interface{}

    for i := 0; i < fieldsCount; i++ {
        field := modelReflect.Field(i)

        switch field.Kind() {
        case reflect.Struct:
            fallthrough
        case reflect.Ptr:
            fieldData = ConvertToMap(field.Interface())
        default:
            fieldData = field.Interface()
        }

        ret[modelRefType.Field(i).Name] = fieldData
    }

    return ret
}

Also I looked at JSON package source code, because it should contain my needed implementation (or parts of it) but don't understand too much.

Answer 1

Waitting for answers