Ruby on rails json中的嵌套模型通过多个关联

使用Rails 3.2。我有以下代码：

# month.rb                        
class Month < ActiveRecord::Base
  has_many :days

  def map_markers
    days.as_json(
      :only => :position,
      :include => {
        :day_shops => { 
          :only => :position, 
          :include => {
            :shops => {
              :only => [ :name ]
            }
          }
        }
      }
    )
  end
end

# day.rb
class Day < ActiveRecord::Base
  belongs_to :month
  has_many :day_shops
  has_many :shops, :through => :day_shops
end

# day_shop.rb
class DayShop < ActiveRecord::Base
  belongs_to :day
  belongs_to :shop
end

# shop.rb
class Shop < ActiveRecord::Base
end

我期望的JSON是：

- position: 1
  :day_shops:
  - position: 1
    :shops:
    - name: Company A
  - position: 2
    :shops:
    - name: Company B
- position: 2
  :day_shops:
  - position: 1
    :shops:
    - name: Company A
  - position: 2
    :shops:
    - name: Company C

---

我怎样才能改变我的方法？谢谢。

DayShop属于一个商店

，而您在

地图标记

方法中将

商店

包括在

DayShop

中。将地图标记修改为：

def map_markers
  days.as_json(
    :only => :position,
    :include => {
      :day_shops => { 
        :only => :position, 
        :include => {
          :shop => {
            :only => [ :name ]
          }
        }
      }
    }
  )
end

---

尝试

：shop

而不是

：shops

在

map\u markers

方法中，因为

DayShop属于一个shop

@SybariteManoj，我愚蠢的错误。你能把答案贴出来让我把它标记为答案吗？谢谢不客气。完成：）

def map_markers
  days.as_json(
    :only => :position,
    :include => {
      :day_shops => { 
        :only => :position, 
        :include => {
          :shop => {
            :only => [ :name ]
          }
        }
      }
    }
  )
end