Course 37 - Building Web Apps with Ruby On Rails | Episode 15: Multi-format Controllers and Custom JSON Serialization
Published: June 28, 2026
Duration: 21:52
In this lesson, you’ll learn about: multi-format responses, JSON serialization, and building clean, reusable Rails API controllers1. Multi-Format Controller ResponsesUsing Ruby on Rails:🔹 Problem:
Different clients need different formatsBrowser → HTMLMobile app → JSONExternal systems → XML🔹 Solution:
Use respond_todef show @user = User.find(params[:id]) respond_to do |format| format.html format.json { render json: @user } format.xml { render xml: @user } end end 👉 Key Insight
One controller action can serve multiple clients efficiently2. How Clients Choose the Format🔹 Metho...
Different clients need different formatsBrowser → HTMLMobile app → JSONExternal systems → XML🔹 Solution:
Use respond_todef show @user = User.find(params[:id]) respond_to do |format| format.html format.json { render json: @user } format.xml { render xml: @user } end end 👉 Key Insight
One controller action can serve multiple clients efficiently2. How Clients Choose the Format🔹 Metho...