class ApplicationController < ActionController::Base
  # Prevent CSRF attacks by raising an exception.
  # For APIs, you may want to use :null_session instead.
  protect_from_forgery with: :null_session

  def landing
  	@pick = Pick.new
  end

end

class ApplicationController < ActionController::Base
  # Prevent CSRF attacks by raising an exception.
  # For APIs, you may want to use :null_session instead.
   protect_from_forgery with: :null_session,
      if: Proc.new { |c| c.request.format =~ %r{application/json} }

  def landing
  	@pick = Pick.new
  end

end

Add more flexibility to null session permit
Add more flexibility to null session permit
