Elm Category type alias and the decode function for a category JSON object

Category.elm

type alias Category = { 
    id : Int
    ,name : String
    ,approved : Int
}

-- categoryDecoder is the code that pulls the data out of the JSON object
-- and creates a Category object
categoryDecoder : Decoder Category
categoryDecoder = 
    map3 Category   
        (field "id" int)
        (field "name" string)
        (field "approved" int)