how to append data to json in ruby/rails?

Question

Say i have this short code:

item = Item.find(params[:id])
render :json => item.to_json

but i needed to insert/push extra information to

Answer 1

I always use:

@item = Item.find(params[:id])
render json: { item: @item.map { |p| { id: p.id, name: p.name } }, message: "it works"  }