ruby - Rendering JSON for multiple Rails objects -

this might terribly simple question, noticed bothering me.

i'm trying render json 1 of controller's methods, it's giving me "undefined method `new' nil:nilclass" error.

here's code that's causing problem:

def index     @users = user.all     render json: @users end

i noticed when try render 1 object json, works fine:

def show     @user = user.find(params[:id])     render json: @user end

or when call to_json on @users object:

def index     @users = user.all     render json: @users.to_json end

i under impression calling render json: implicitly calling to_json anyway, why calling twice solve issue?

i believe it's issue @users being array of objects needs each object converted first before whole array reassembled , output json.

Szoka