Every action which we define in the controller should support and return response in JSON format unless otherwise noted. Below is the gist of how it should look.

example_controller.rb

#prototype of how an action which returns JSON should look.

def action
  @result = Hash.new
  @result['status'] = true
  @result['error_messages'] = [ ]
  @result['success_messages'] = [ ]
  if <success>
    @clients = Client.all
    @clients_data = []
    @clients.each do |client|
      @single_client = Hash.new
      @single_client['client_info']= client
      @single_client['projects'] = client.projects
      @clients_data << @single_client
    end
    @result['data'] = @clients_data
    @result['success_messages'].push("Action performed successfully")
  else
    @result['status'] &= false
    @result['error_messages'].push("There was an error performing this action")
  end
  
	respond_to do |format|
    format.json { render json: @result }
  end
end