Render :json with extra data

Question

I have a model called Todo and I render this:

format.json { render :json => @todo }

Each Todo belongs_to a List. I want to add the value

Answer 1

You may want to capture the value of the JSON data, and then modify it.

format.json { render :json => JSON::parse(@todo.to_json).merge("list" => { "completion_percentage" => 63 }).to_json }