思考狮身人面像 - 与HAS_ONE态关联

Question

我试图做的是这里所描述geosearching： http://freelancing-god.github.com/ts/en/geosearching.html

除，而不是我的模型具有纬度和经度列，我想做的事：

class Post 
    has_one :location, :as => :locationable 
end 

class User 
    has_one :location, :as => :locationable 
end 

class Location 
    belongs_to :locationable, :polymorphic => true 
end 

使用户和帖子都可以有位置记录由locationable_type设置和locationable_id ......所以，我没有在我的岗位模型如下：

define_index do 
    has locationable(:id), :as => :locationable_id 
    has "RADIANS(locations.lat)", :as => :latitude, :type => :float 
    has "RADIANS(locations.lng)", :as => :longitude, :type => :float 
end 

但我在'字段列表'错误中收到未知列...

我在做什么错？

Answer 1

我想通了。这行：

has locationable(:id), :as => :locationable_id 

应该是强迫加入...但不能因为没有这样的事情作为邮寄记录的定位它有一个位置..所以它需要：

define_index do 
    has location.locationable_id, :as => :locationable_id 
    has "RADIANS(locations.lat)", :as => :latitude, :type => :float 
    has "RADIANS(locations.lng)", :as => :longitude, :type => :float 
end 

现在它的工作。

Answer 2

它看起来你犯了一个错误错字：（为你写的，你没有“位置”，你有“locationable”）

define_index do 
    has locationable(:id), :as => :locationable_id 
    has "RADIANS(locationable.lat)", :as => :latitude, :type => :float 
    has "RADIANS(locationable.lng)", :as => :longitude, :type => :float 
end 

，并请确保您有纬度，经度列在“位置”表（选址模型）