[英]Relationships => through with polymorphic_path?
my models are: 我的模型是:
class City < ActiveRecord::Base
belongs_to :region
has_many :activities
has_many :restaurants
end
class Activity < ActiveRecord::Base
belongs_to :city
end
I want acces all activities from all the cities. 我要访问所有城市的所有活动。 From a previous question on stackoverflow, i read that i can't do this @cities.activities, instead i did the following: 从上一个关于stackoverflow的问题中,我读到我无法执行此@ cities.activities,而是执行以下操作:
add has_many through association to Region 通过关联将has_many添加到Region
class Region < ActiveRecord::Base
has_many :activities, :through => :cities
end
@activities = @region.activities.find_all_by_homepage_city(true)
But when i call the variable @activities use the polymorphic_path. 但是,当我调用变量@activities时,使用polymorphic_path。
- @activities.each do |b|
%li
=link_to b.name, polymorphic_path([@region, @city, b])
I get the message "not method for region_activity_path" . 我收到消息“不是region_activity_path的方法”。 This is correct because there is no resources: activities after the resources: regions 这是正确的,因为没有资源:资源之后的活动:地区
resources :regions do
resources :cities do
resources :activities
I can add activities resources after regions but then my urls are not correct. 我可以在区域之后添加活动资源,但是我的网址不正确。 How can i fix this? 我怎样才能解决这个问题?
There is convention that you should not go more than 2 levels while generating routes unless its strictly needed. 按照惯例,除非严格需要,否则在生成路由时不应超过两个级别。
I suggest you choose simple route for activity
rather than 3 level of route :) 我建议您choose simple route for activity
而不要选择3级路线:)
Still if you need then - 如果您仍然需要-
rake routes | grep activi
region_city_activities GET /regions/:region_id/cities/:city_id/activities(.:format) {:action=>"index", :controller=>"activities"}
POST /regions/:region_id/cities/:city_id/activities(.:format) {:action=>"create", :controller=>"activities"}
new_region_city_activity GET /regions/:region_id/cities/:city_id/activities/new(.:format) {:action=>"new", :controller=>"activities"}
edit_region_city_activity GET /regions/:region_id/cities/:city_id/activities/:id/edit(.:format) {:action=>"edit", :controller=>"activities"}
region_city_activity GET /regions/:region_id/cities/:city_id/activities/:id(.:format) {:action=>"show", :controller=>"activities"}
PUT /regions/:region_id/cities/:city_id/activities/:id(.:format) {:action=>"update", :controller=>"activities"}
DELETE /regions/:region_id/cities/:city_id/activities/:id(.:format) {:action=>"destroy", :controller=>"activities"}
rails c
-> app.polymorphic_path([Region.last, City.first, Activity.last])
=> "/regions/28/cities/1/activities/12"
-> app.polymorphic_path([Region.last, City.first, Activity.new])
=> "/regions/28/cities/1/activities"
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