Rails有一个嵌套属性，关联不匹配错误(_O)

Question

我使用的是Rails 3.2和Ruby 1.9.3

以下是该应用程序的外观：

型号

Class Location 
belongs_to :answer
attr_accessible :latitude, :longitude, :answer_id
end

Class Answer
attr_accessible :location
has_one :location
accepts_nested_attributes_for :location
end

控制器

def answer
   @answer = Answer.new
   @location = @answer.build_location  
end

查看

<%= f.fields_for :location do |locator| %>
    <%= locator.hidden_field :longitude, class:'longitude' %>
    <%= locator.hidden_field :latitude, class:'latitude' %>
 <% end %>

发送的哈希（在日志中可见）：

"answer"=>{"location"=>{"longitude"=>"2.3422566", "latitude"=>"48.8198344"}, "commit"=>"Send"}

错误：ActiveRecord:：AssociationTypeMismatch

有人能帮我找出问题吗？

提前感谢

Answer 1

这应该是：

"answer"=>"location_attributes"=>｛"经度"=>"2.3422566"，"纬度"=>"48.8198344"｝，"commit"=>"Send"｝