wblog/app/controllers/subscribes_controller.rb

class SubscribesController < ApplicationController

  def index
  end

  def create
    subscribe = Subscribe.find_or_initialize_by(email: params[:email])
    subscribe.enable = true

    if subscribe.save
      render :json => { success: true }
    else
      render :json => { success: false, message: subscribe.errors.full_messages.join(", ")}
    end
  end

  def cancel
    subscribe = Subscribe.find_or_initialize_by(email: params[:email])
    subscribe.enable = false
    subscribe.save

    flash[:notice] = "退订成功: #{params[:email]}"
    render :json => { success: true }
  end

end