调用“new”的路由错误具有嵌套资源的方法

Question

我有两个嵌套资源：

class Customer < ActiveRecord::Base
  has_many :locations, :dependent => :destroy
  accepts_nested_attributes_for :locations
end

class Location < ActiveRecord::Base
  belongs_to :customer
end

在 paths.rb 中，我有

resources :customers do
  resources :locations
end    

用于创建新位置的代码是

<%= link_to image_tag("add.png"), new_customer_location_path(@customer), :class => "button" %>

当我尝试创建新位置时，出现以下错误 路由

错误

没有路由匹配 {:action=>"show", :controller =>"locations", :customer_id=>#, :id=>#}

为什么调用 :action=>"show" 而不是 "new"？

rake 路由输出是

customer_locations     GET    /customers/:customer_id/locations(.:format)                  {:action=>"index", :controller=>"locations"}
                       POST   /customers/:customer_id/locations(.:format)                  {:action=>"create", :controller=>"locations"}
new_customer_location  GET    /customers/:customer_id/locations/new(.:format)              {:action=>"new", :controller=>"locations"}
edit_customer_location GET    /customers/:customer_id/locations/:id/edit(.:format)         {:action=>"edit", :controller=>"locations"}
customer_location      GET    /customers/:customer_id/locations/:id(.:format)              {:action=>"show", :controller=>"locations"}
                       PUT    /customers/:customer_id/locations/:id(.:format)              {:action=>"update", :controller=>"locations"}
                       DELETE /customers/:customer_id/locations/:id(.:format)              {:action=>"destroy", :controller=>"locations"}

Locations_controller.rb 中新操作的控制器代码是

before_filter :find_customer

def new
  @location = @customer.locations.new

  respond_to do |format|
    format.html # new.html.erb
    format.json { render json: @location }
  end
end

我不明白该错误，我还有另外两个可以正常工作的嵌套资源，检查了所有代码，看起来完全相同... “位置”是否有可能是保留字，或者是否有遗漏/错误的内容？

Answer 1

好的，找到问题了。

内部 app/views/locations/_form.html.erb
由 app/views/locations/new.html.erb 调用，

其中存在一个带有错误路径助手的链接：

    <%= link_to "Cancel", customer_location_path(@customer,@location) %>

我已将其更改为

    <%= link_to "Cancel", customer_path(@customer) %>

，现在一切正常

Answer 2

尝试在 image_tag 上放置右括号。

<%= link_to image_tag("add.png"), new_customer_location_path(@customer), :class => "button" %>