[更新] 代码很少，因为我意识到我需要为一所学校（每代一个）生成更多代图片，所以协会现在不同了。
我的 School 模型带有 GenerationPicture ：
class School < ActiveRecord::Base
belongs_to :city
has_many :sclasses
has_many :users, through: :sclasses
has_many :generation_pictures
validates :name, presence: true
validates :icon_url, length: { maximum: 100 }
end
class GenerationPicture < ActiveRecord::Base
validates :generation, presence: true, numericality: { only_integer: true }, uniqueness: true
has_attached_file :image, styles: { large: "600x600", medium: "300x300>", thumb: "150x150" }, default_url: "/images/:style/missing.png"
validates_attachment_content_type :image, content_type: /\Aimage\/.*\Z/
belongs_to :school
end
这是我的 generation_pictures 控制器：
class GenerationPicturesController < ApplicationController
def new
find_city
find_school
@generation_picture = @school.generation_pictures.new
end
def create
find_city
find_school
@generation_picture = @school.generation_pictures.new(generation_picture_params)
if @generation_picture.save
redirect_to generation_picture_path(@generation_picture)
else
render "new"
end
end
def edit
find_city
find_school
find_generation_picture
end
def update
find_city
find_school
find_generation_picture
if @generation_picture.update(generation_picture_params)
redirect_to generation_picture_path(@generation_picture)
else
render "edit"
end
end
private
def generation_picture_params
params.require(:generation_picture).permit(:generation, :image)
end
def find_city
@city = City.find(params[:city_id])
end
def find_school
@school = School.find(params[:school_id])
end
def find_generation_picture
@generation_picture = @school.generation_pictures.find(params[:id])
end
end
当我尝试访问新图片的页面时，我返回索引页面，控制台显示没有错误。
以下是路线：
Rails.application.routes.draw do
root 'welcome#index'
# prevedene rute
get "/pocetna" => "welcome#index", as: "index"
get "/korpa" => "carts#new", as: "new_cart"
get "/poslato" => "carts#success", as: "success"
resources :sessions, only: [:new, :create, :destroy]
get "/prijava" => "sessions#new", as: "login"
post "/prijava" => "sessions#create"
get "/odjava" => "sessions#destroy", as: "logout"
delete "/odjava" => "sessions#destroy"
#resources :users do
# resources :photos
#end
# Gradovi
get "/gradovi" => "welcome#index", as: "cities"
get "/gradovi/novi" => "cities#new", as: "new_city"
post "/gradovi" => "cities#create"
get "/gradovi/:id" => "cities#show", as: "city"
get "/gradovi/:id/uredi" => "cities#edit", as: "edit_city"
patch "/gradovi/:id" => "cities#update"
# Škole
get "/gradovi/:city_id" => "schools#index", as: "schools"
get "/gradovi/:city_id/nova-skola" => "schools#new", as: "new_school"
post "/gradovi/:city_id/" => "schools#create"
get "/gradovi/:city_id/skola/:id" => "schools#show", as: "school"
get "/gradovi/:city_id/skola/:id/uredi" => "schools#edit", as: "edit_school"
patch "/gradovi/:city_id/skola/:id" => "schools#update"
# Tabloi
get "/gradovi/:city_id/skola/:school_id/tablo/novi" => "generation_pictures#new", as: "new_generation_picture"
post "/gradovi/:city_id/skola/:school_id" => "generation_pictures#create"
get "/gradovi/:city_id/skola/:school_id/tablo/:id" => "generation_pictures#show", as: "generation_picture"
get "/gradovi/:city_id/skola/:school_id/tablo/:id/uredi" => "generation_pictures#edit", as: "edit_generation_picture"
patch "/gradovi/:city_id/skola/:school_id" => "generation_pictures#update"
# Razredi
get "/gradovi/:city_id/skola/:school_id" => "sclasses#index", as: "sclasses"
post "/gradovi/:city_id/skola/:school_id" => "sclasses#create"
get "/gradovi/:city_id/skola/:school_id/razred/dodaj" => "sclasses#new", as: "new_sclass"
get "/gradovi/:city_id/skola/:school_id/razred/:id" => "sclasses#show", as: "sclass"
get "/gradovi/:city_id/skola/:school_id/razred/:id/uredi" => "sclasses#edit", as: "edit_sclass"
patch "/gradovi/:city_id/skola/:school_id/razred/:id" => "sclasses#update"
# Učenici
get "/gradovi/:city_id/skola/:school_id/razred/:sclass_id" => "users#index", as: "users"
post "/gradovi/:city_id/skola/:school_id/razred/:sclass_id" => "users#create"
get "/gradovi/:city_id/skola/:school_id/razred/:sclass_id/ucenik/dodaj" => "users#new", as: "new_user"
get "/gradovi/:city_id/skola/:school_id/razred/:sclass_id/ucenik/:id" => "users#show", as: "user"
get "/gradovi/:city_id/skola/:school_id/razred/:sclass_id/ucenik/:id/uredi" => "users#edit", as: "edit_user"
patch "/gradovi/:city_id/skola/:school_id/razred/:sclass_id/ucenik/:id" => "users#update"
delete "/gradovi/:city_id/skola/:school_id/razred/:sclass_id/ucenik/:id" => "users#destroy"
resources :city
resources :carts
end
这是部分形式：
<% if controller.action_name == "edit" %>
<%= form_for [@city, @school, @generation_picture], url: generation_picture_path(@city, @school, @generation_picture), html: { multipart: true } do |f| %>
<% if @generation_picture.errors.any? %>
<div class="alert alert-danger">
<ul>
<% @generation_picture.errors.full_messages.each do |msg| %>
<li><%= msg %></li>
<% end %>
</ul>
</div>
<% end %>
<%= f.label "Fotografija:" %>
<%= f.file_field :image, class: "input-field" %>
<%= f.label "Generacija:" %>
<%= f.text_field :generation, class: "input-field" %>
<%= f.submit "Pošalji", class: "btn btn-default" %>
<% end %>
<% else %>
<%= form_for @generation_picture, url: school_path(@city, @school), html: { multipart: true } do |f| %>
<% if @generation_picture.errors.any? %>
<div class="errors alert alert-danger">
<ul>
<% @generation_picture.errors.full_messages.each do |msg| %>
<li><%= msg %></li>
<% end %>
</ul>
</div>
<% end %>
<%= f.label "Fotografija:" %>
<%= f.file_field :image, class: "input-field" %>
<%= f.label "Generacija:" %>
<%= f.text_field :generation, class: "input-field" %>
<%= f.submit "Pošalji", class: "btn btn-default" %>
<% end %>
<% end %>
[更新] 耙路线输出
new_generation_picture GET /gradovi/:city_id/skola/:school_id/tablo/novi(.:format) generation_pictures#new
POST /gradovi/:city_id/skola/:school_id(.:format) generation_pictures#create
generation_picture GET /gradovi/:city_id/skola/:school_id/tablo/:id(.:format) generation_pictures#show
edit_generation_picture GET /gradovi/:city_id/skola/:school_id/tablo/:id/uredi(.:format) generation_pictures#edit
PATCH /gradovi/:city_id/skola/:school_id(.:format) generation_pictures#update
schools GET /gradovi/:city_id(.:format) schools#index
new_school GET /gradovi/:city_id/nova-skola(.:format) schools#new
POST /gradovi/:city_id(.:format) schools#create
school GET /gradovi/:city_id/skola/:id(.:format) schools#show
edit_school GET /gradovi/:city_id/skola/:id/uredi(.:format) schools#edit
PATCH /gradovi/:city_id/skola/:id(.:format) schools#update
[更新2] 当前路线
Rails.application.routes.draw do
root 'welcome#index'
get "/korpa" => "carts#new", as: "new_cart"
get "/poslato" => "carts#success", as: "success"
resources :sessions, only: [:new, :create, :destroy]
get "/prijava" => "sessions#new", as: "login"
post "/prijava" => "sessions#create"
get "/odjava" => "sessions#destroy", as: "logout"
delete "/odjava" => "sessions#destroy"
scope(path_names: { new: 'novi', edit: 'uredi' }) do
resources :cities, path: 'gradovi', except: [:index, :destroy] do
scope(path_names: { new: 'nova-skola', edit: 'uredi' }) do
resources :schools, path: 'skola', except: [:index, :destroy], shallow: true do
scope(path_names: { new: 'dodaj', edit: 'uredi'}) do
resources :sclasses, path: 'razred', except: [:destroy] #, shallow: true
scope(path_names: { new: 'dodaj', edit: 'uredi'}) do
resources :users, path: 'ucenik'
end
end
scope(path_names: { new: 'novi', edit: 'uredi'}) do
resources :generation_pictures, path: 'tablo', except: [:index, :destroy]
end
end
end
end
end
resources :carts, except: [:new] # defined at top
end
答案 0 :(得分：1)
您有很多路线覆盖其他路线，例如：
get "/gradovi/:id" => "cities#show", as: "city"
# vs.
get "/gradovi/:city_id" => "schools#index", as: "schools"
和
post "/gradovi/:city_id/skola/:school_id" => "generation_pictures#create"
# vs.
post "/gradovi/:city_id/skola/:school_id" => "sclasses#create"
和
get "/gradovi/:city_id/skola/:school_id/razred/:id" => "sclasses#show", as: "sclass"
# vs
get "/gradovi/:city_id/skola/:school_id/razred/:sclass_id" => "users#index", as: "users"
Rails无法判断一个数字是:id还是:city_id，它只是看到一个数字。同样，配置相同的URL以转到多个控制器操作将导致令人失望的行为。
我认为良好的第一步是使用嵌套资源和translated paths简化路径定义。
Rails.application.routes.draw do
root 'welcome#index'
# prevedene rute
#
# another duplicate of root_path:
# get "/pocetna" => "welcome#index", as: "index"
get "/korpa" => "carts#new", as: "new_cart"
get "/poslato" => "carts#success", as: "success"
get "/prijava" => "sessions#new", as: "login"
post "/prijava" => "sessions#create"
get "/odjava" => "sessions#destroy", as: "logout"
delete "/odjava" => "sessions#destroy"
# Gradovi
scope(path_names: { new: 'novi', edit: 'uredi' }) do
resources :cities, path: 'gradovi', except: [:index, :destroy] do
# don't create multiple routes to 'welcome#index',
# use root_url or root_path
# get '/gradovi', to: 'welcome#index', as: 'cities', on: :collection
# Škole
scope(path_names: { new: 'nova-skola', edit: 'uredi' }) do
# use root_url here for 'welcome#index', too
resources :schools, path: 'skola', except: [:index, :destroy] do
# Tabloi
scope(path_names: { new: 'novi', edit: 'uredi'}) do
resources :generation_pictures, path: 'tablo', except: [:index, :destroy]
end
# Razredi
scope(path_names: { new: 'dodaj', edit: 'uredi'}) do
resources :sclasses, path: 'razred', except: [:destroy]
# Učenici
scope(path_names: { new: 'dodaj', edit: 'uredi'}) do
resources :users, path: 'ucenik'
end
end
end
end
end
# You already have `resources :cities` as 'gradovi' above:
# resources :city
resources :carts, except: [:new] # defined at top
end
这将改变您在代码中其他地方使用的路线助手名称，但您的路线现在应该更加清洁。您还应该查看shallow routing keyword，因为嵌套这么多只是为了让您的用户（例如），并不是一个伟大的风格。
没有理由为什么获取课程学生列表必须在URL中包含该城市，并且没有人想要输入new_city_school_sclass_user_path(@city, @school, @sclass)，因此请更好地整理您的网址。它不会影响您的关联或任何应用功能，只会影响路由名称和URL。我建议将shallow: true放在schools上：
scope(path_names: { new: 'novi', edit: 'uredi' }) do
# Gradovi
resources :cities, path: 'gradovi', except: [:index, :destroy] do
# don't create multiple routes to 'welcome#index',
# use root_url or root_path
# get '/gradovi', to: 'welcome#index', as: 'cities', on: :collection
# Škole
scope(path_names: { new: 'nova-skola', edit: 'uredi' }) do
# use root_url here for 'welcome#index', too
resources :schools, path: 'skola', except: [:index, :destroy], shallow: true do
# Razredi
scope(path_names: { new: 'dodaj', edit: 'uredi'}) do
resources :sclasses, path: 'razred', except: [:destroy] #, shallow: true
# Učenici
scope(path_names: { new: 'dodaj', edit: 'uredi'}) do
resources :users, path: 'ucenik'
end
end
# Tabloi
scope(path_names: { new: 'novi', edit: 'uredi'}) do
resources :generation_pictures, path: 'tablo', except: [:index, :destroy]
end
end
end
end
end
它为您提供了这样的路线列表：
root GET / welcome#index
new_cart GET /korpa(.:format) carts#new
success GET /poslato(.:format) carts#success
login GET /prijava(.:format) sessions#new
prijava POST /prijava(.:format) sessions#create
logout GET /odjava(.:format) sessions#destroy
odjava DELETE /odjava(.:format) sessions#destroy
sclass_users GET /razred/:sclass_id/ucenik(.:format) users#index
POST /razred/:sclass_id/ucenik(.:format) users#create
new_sclass_user GET /razred/:sclass_id/ucenik/dodaj(.:format) users#new
edit_user GET /ucenik/:id/uredi(.:format) users#edit
user GET /ucenik/:id(.:format) users#show
PATCH /ucenik/:id(.:format) users#update
PUT /ucenik/:id(.:format) users#update
DELETE /ucenik/:id(.:format) users#destroy
school_sclasses GET /skola/:school_id/razred(.:format) sclasses#index
POST /skola/:school_id/razred(.:format) sclasses#create
new_school_sclass GET /skola/:school_id/razred/dodaj(.:format) sclasses#new
edit_sclass GET /razred/:id/uredi(.:format) sclasses#edit
sclass GET /razred/:id(.:format) sclasses#show
PATCH /razred/:id(.:format) sclasses#update
PUT /razred/:id(.:format) sclasses#update
school_generation_pictures POST /skola/:school_id/tablo(.:format) generation_pictures#create
new_school_generation_picture GET /skola/:school_id/tablo/novi(.:format) generation_pictures#new
edit_generation_picture GET /tablo/:id/uredi(.:format) generation_pictures#edit
generation_picture GET /tablo/:id(.:format) generation_pictures#show
PATCH /tablo/:id(.:format) generation_pictures#update
PUT /tablo/:id(.:format) generation_pictures#update
city_schools GET /gradovi/:city_id/skola(.:format) schools#index
POST /gradovi/:city_id/skola(.:format) schools#create
new_city_school GET /gradovi/:city_id/skola/nova-skola(.:format) schools#new
edit_school GET /skola/:id/uredi(.:format) schools#edit
school GET /skola/:id(.:format) schools#show
PATCH /skola/:id(.:format) schools#update
PUT /skola/:id(.:format) schools#update
cities POST /gradovi(.:format) cities#create
new_city GET /gradovi/novi(.:format) cities#new
edit_city GET /gradovi/:id/uredi(.:format) cities#edit
city GET /gradovi/:id(.:format) cities#show
PATCH /gradovi/:id(.:format) cities#update
PUT /gradovi/:id(.:format) cities#update
carts GET /carts(.:format) carts#index
POST /carts(.:format) carts#create
edit_cart GET /carts/:id/edit(.:format) carts#edit
cart GET /carts/:id(.:format) carts#show
PATCH /carts/:id(.:format) carts#update
PUT /carts/:id(.:format) carts#update
DELETE /carts/:id(.:format) carts#destroy