Question

我有一个食谱应用程序，允许用户保存他们最喜欢的食谱，并在他们的个人资料页面（line_items索引），他们可以根据自己喜欢的食谱获得一个随机的每周菜单。我试图打印出每周菜单的成分，但到目前为止我无法打印出成分的名称。目前，当我尝试类似的东西时：

<%= line_item.recipe.ingredient.name %>

结果是“成分”。

我怀疑这可能与协会有关，但我无法弄明白。任何帮助将不胜感激。

订单项：

class LineItem < ActiveRecord::Base
  belongs_to :user 
  belongs_to :recipe
end

配方：

class Recipe < ActiveRecord::Base
  has_many :line_items 
  before_destroy :ensure_not_referenced_by_any_line_item
  has_many :ingredients
  has_many :directions
  has_many :users, :through => :line_items


accepts_nested_attributes_for :ingredients, 
                              reject_if: :all_blank, 
                              allow_destroy: true
accepts_nested_attributes_for :directions, 
                              reject_if: :all_blank, 
                              allow_destroy: true
validates :title, :description, :image, presence:true
  has_attached_file :image, styles: { medium: "400x400#" }
    validates_attachment_content_type :image, content_type: /\Aimage\/.*\Z/

  private
    #ensure that there are no line items referencing this recipe
    def ensure_not_referenced_by_any_line_item
      if line_items.empty?
        return true
      else
        errors.add(:base, 'Line items present')
        return false
      end
    end
end

成分：

class Ingredient < ActiveRecord::Base
  belongs_to :recipe
end

订单项视图：

<button class="btn btn-primary " type="button" data-toggle="collapse" data-target="#menu" aria-expanded="true" aria-controls="menu">
 This Week's Menu
</button>
<div class="collapse in" id="menu">
  <div class="well"> 

    <br>

    <% LineItem.where(id: ids_of_line_items_this_week).each do |line_item| %>
    <li><%= line_item.recipe.title %> <%= link_to 'Replace', line_item_replace_weekly_line_item_path(line_item_id: line_item.id), method: :put, :class => "btn btn-default btn-xs" %>

    <br>
    <%= line_item.recipe.ingredients.name %> </li>
    <% end %>
  </div>
</div>

输出变量的属性返回对象Class，可能是关联问题

0 个答案: