Let's say you have this JSON:
{
"foo": "123"
}
And you want to unmarshall it into this struct:
type Foo struct {
Bar int
}
You can tell the JSON unmarshaller to use a different type for the Bar field:
type Foo struct {
Bar int `json:"bar,string"`
}
You can even omit the field name if it's the same (case-insensitive) as the JSON field name:
type Foo struct {
Bar int `json:",string"`
}