如何从主 Rails 应用程序访问 Spree 的 link_to_cart 函数 [英] How to access Spree's link_to_cart function from main rails app

问题描述

我正在一个现有的 Rails 应用程序中构建一个狂欢商店，我需要从 Spree 引擎外部访问 link_to_cart.

I am building a spree shop into an exiting Rails application, and I need to access link_to_cart from outside of the Spree engine.

link_to_cart 可在此处找到:spree/core/app/helpers/spree/base_helper.rb

link_to_cart can be found here: spree/core/app/helpers/spree/base_helper.rb

由于我修改了link_to_cart中的样式，所以我还创建了:

Since I have modified the styling in link_to_cart, I also created:

  #helpers/spree/base_helper_decorator.rb
  module Spree
    module BaseHelper
      def link_to_cart(text = nil)
      text = text ? h(text) : Spree.t('cart')
      css_class = nil

      if simple_current_order.nil? or simple_current_order.item_count.zero?
        text = "#{text}: (#{Spree.t('empty')})"
        css_class = 'empty'
      else
        text = "<i class='fa fa-shopping-cart'></i> #{text}: (#{simple_current_order.item_count})  <span class='amount'>#{simple_current_order.display_total.to_html}</span>".html_safe
        css_class = 'full'
      end

      link_to text.html_safe, spree.cart_path, :class => "cart-info #{css_class} btn btn-small btn-success pull-right", style: "margin-left:10px;"
    end
  end
end

我曾尝试在引擎之外做类似 Spree::BaseHelper.link_to_cart 之类的事情，但我不断收到 未定义的局部变量或方法 'link_to_cart'

I have tried doing stuff like Spree::BaseHelper.link_to_cart outside of the engine, but I keep getting undefined local variable or method 'link_to_cart'

我在 不同的 StackOverflow 问题，看起来很有希望，但我不知道如何根据我的需要修改它:

I found this on a different StackOverflow question, and it seems promising, but I'm not sure how to modify it for my needs:

module MyEngine
  class Engine < Rails::Engine
    initializer 'my_engine.action_controller' do |app|
      ActiveSupport.on_load :action_controller do
        helper MyEngine::ImportantHelper
      end
    end
  end
end

推荐答案

好的，感谢 Ben 让我走上正轨.这是我的解决方案:

Ok, thanks Ben for getting me on the right track. Here was my solution:

# class ApplicationController < ActionController::Base
   include Spree::Core::ControllerHelpers::Order
   include Spree::Core::ControllerHelpers::Auth
   helper Spree::BaseHelper
   helper Spree::StoreHelper

更新

我遇到了在引擎之外未定义 current_store 的问题.我不确定如何正确解决这个问题，但与此同时，我刚刚添加了以下内容以阻止狂欢调用 current_store:

I ran into an issue with current_store being undefined outside of the engine. I'm not sure how to solve this properly, but in the meantime I've just added the following to stop spree from calling current_store:

module Spree
  module Core
    module ControllerHelpers
      module Order
        def current_order_params
          { currency: current_currency, guest_token: cookies.signed[:guest_token], store_id: Spree::Store.first, user_id: try_spree_current_user.try(:id) }
        end
      end
    end
  end
end

还有 helper Spree::StoreHelper 似乎不再需要显示购物车按钮和当前订单..

Also helper Spree::StoreHelper seems to no longer be required to display the cart button and current orders..

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