我有一个has_many：通过模型Thing和Category之间的关联，所以每个人都有另一个。当我创建一个新的Thing并将它与一个Category关联，然后将Category.name放在Thing视图中，然后我尝试将它作为一个链接，它返回错误“ActionController :: UrlGenerationError in Things＃show ”。我做错了什么？
事物控制器
class ThingsController < ApplicationController
def show
@thing = Thing.find(params[:id])
@category_things = CategoryThing.all
@thing.categories.build
end
def index
end
def new
@thing = Thing.new
@things = Thing.all
end
def create
@thing = Thing.new(thing_params)
if @thing.save
redirect_to @thing
else
render 'new'
end
end
private
def thing_params
params.require(:thing).permit(:name, :image_path, :avatar)
end
def results
end
end
类别控制器
class CategoriesController < ApplicationController
def show
@category = Category.find(params[:id])
end
def new
@category = Category.new
end
def create
@category = Category.new(category_params)
if @category.save
redirect_to @category
else
render 'new'
end
end
private
def category_params
params.require(:category).permit(:name)
end
def results
end
end
事物模型
class Thing < ActiveRecord::Base
has_many :category_things
has_many :categories, :through => :category_things
end
类别模型
class Category < ActiveRecord::Base
has_many :category_things
has_many :things, :through => :category_things
end
CategoryThing模型
class CategoryThing < ActiveRecord::Base
belongs_to :category
belongs_to :thing
end
Thing.show查看
<div id= "thing">
<p>
<% @thing.categories.each do |category| %>
<%= link_to category.name, category_path(category) %>
*****[THE ABOVE WORKS WHEN I JUST PUT "category.name"]*****
<% end %>
</p>
</div>
Thing.new View
<h1>Add Something!</h1>
<p>
<%= form_for @thing, :url => things_path do |f| %>
<%= f.text_field :name, :placeholder => "Name of the thing" %>
<br>
<%= f.label :categories_the_thing_belongs_to %>
<%= f.collection_select :categories, Category.all, :id, :name %>
<br>
<%= f.submit "Submit", class: "btn btn-primary" %>
<% end %>
</p>
耙路线的输出
Prefix Verb URI Pattern Controller#Action
ratings_new GET /ratings/new(.:format) ratings#new
down_votes_new GET /down_votes/new(.:format) down_votes#new
thing_new GET /thing/new(.:format) thing#new
good_comments_new GET /good_comments/new(.:format) good_comments#new
good_comments_show GET /good_comments/show(.:format) good_comments#show
bad_comments_new GET /bad_comments/new(.:format) bad_comments#new
related_things_new GET /related_things/new(.:format) related_things#new
things_new GET /things/new(.:format) things#new
category_things_new GET /category_things/new(.:format) category_things#new
thing_ratings_new GET /thing_ratings/new(.:format) thing_ratings#new
category_ratings_new GET /category_ratings/new(.:format) category_ratings#new
subjects GET /subjects(.:format) subjects#index
POST /subjects(.:format) subjects#create
new_subject GET /subjects/new(.:format) subjects#new
edit_subject GET /subjects/:id/edit(.:format) subjects#edit
subject GET /subjects/:id(.:format) subjects#show
PATCH /subjects/:id(.:format) subjects#update
PUT /subjects/:id(.:format) subjects#update
DELETE /subjects/:id(.:format) subjects#destroy
subjects_show GET /subjects/show(.:format) subjects#show
subject_things_new GET /subject_things/new(.:format) subject_things#new
categories GET /categories(.:format) categories#index
POST /categories(.:format) categories#create
new_category GET /categories/new(.:format) categories#new
edit_category GET /categories/:id/edit(.:format) categories#edit
category GET /categories/:id(.:format) categories#show
PATCH /categories/:id(.:format) categories#update
PUT /categories/:id(.:format) categories#update
DELETE /categories/:id(.:format) categories#destroy
categories_results GET /categories/results(.:format) categories#results
subjects_new GET /subjects/new(.:format) subjects#new
root GET / home_page#home
all_things_new GET /all/things/new(.:format) things#new
all_allthings GET /all/allthings(.:format) all#allthings
thing_good_comments GET /things/:thing_id/good_comments(.:format) good_comments#index
POST /things/:thing_id/good_comments(.:format) good_comments#create
new_thing_good_comment GET /things/:thing_id/good_comments/new(.:format) good_comments#new
edit_thing_good_comment GET /things/:thing_id/good_comments/:id/edit(.:format) good_comments#edit
thing_good_comment GET /things/:thing_id/good_comments/:id(.:format) good_comments#show
PATCH /things/:thing_id/good_comments/:id(.:format) good_comments#update
PUT /things/:thing_id/good_comments/:id(.:format) good_comments#update
DELETE /things/:thing_id/good_comments/:id(.:format) good_comments#destroy
thing_bad_comments GET /things/:thing_id/bad_comments(.:format) bad_comments#index
POST /things/:thing_id/bad_comments(.:format) bad_comments#create
new_thing_bad_comment GET /things/:thing_id/bad_comments/new(.:format) bad_comments#new
edit_thing_bad_comment GET /things/:thing_id/bad_comments/:id/edit(.:format) bad_comments#edit
thing_bad_comment GET /things/:thing_id/bad_comments/:id(.:format) bad_comments#show
PATCH /things/:thing_id/bad_comments/:id(.:format) bad_comments#update
PUT /things/:thing_id/bad_comments/:id(.:format) bad_comments#update
DELETE /things/:thing_id/bad_comments/:id(.:format) bad_comments#destroy
thing_ratings GET /things/:thing_id/ratings(.:format) ratings#index
POST /things/:thing_id/ratings(.:format) ratings#create
new_thing_rating GET /things/:thing_id/ratings/new(.:format) ratings#new
edit_thing_rating GET /things/:thing_id/ratings/:id/edit(.:format) ratings#edit
thing_rating GET /things/:thing_id/ratings/:id(.:format) ratings#show
PATCH /things/:thing_id/ratings/:id(.:format) ratings#update
PUT /things/:thing_id/ratings/:id(.:format) ratings#update
DELETE /things/:thing_id/ratings/:id(.:format) ratings#destroy
thing_up_votes GET /things/:thing_id/up_votes(.:format) up_votes#index
POST /things/:thing_id/up_votes(.:format) up_votes#create
new_thing_up_vote GET /things/:thing_id/up_votes/new(.:format) up_votes#new
edit_thing_up_vote GET /things/:thing_id/up_votes/:id/edit(.:format) up_votes#edit
thing_up_vote GET /things/:thing_id/up_votes/:id(.:format) up_votes#show
PATCH /things/:thing_id/up_votes/:id(.:format) up_votes#update
PUT /things/:thing_id/up_votes/:id(.:format) up_votes#update
DELETE /things/:thing_id/up_votes/:id(.:format) up_votes#destroy
things GET /things(.:format) things#index
POST /things(.:format) things#create
new_thing GET /things/new(.:format) things#new
edit_thing GET /things/:id/edit(.:format) things#edit
thing GET /things/:id(.:format) things#show
PATCH /things/:id(.:format) things#update
PUT /things/:id(.:format) things#update
DELETE /things/:id(.:format) things#destroy
things_show GET /things/show(.:format) things#show
things_results GET /things/results(.:format) things#results
things_random GET /things/random(.:format) things#random
web_console /console WebConsole::Engine
Routes for WebConsole::Engine:
root GET / web_console/console_sessions#index
input_console_session PUT /console_sessions/:id/input(.:format) web_console/console_sessions#input
pending_output_console_session GET /console_sessions/:id/pending_output(.:format) web_console/console_sessions#pending_output
configuration_console_session PUT /console_sessions/:id/configuration(.:format) web_console/console_sessions#configuration
console_sessions GET /console_sessions(.:format) web_console/console_sessions#index
POST /console_sessions(.:format) web_console/console_sessions#create
new_console_session GET /console_sessions/new(.:format) web_console/console_sessions#new
edit_console_session GET /console_sessions/:id/edit(.:format) web_console/console_sessions#edit
console_session GET /console_sessions/:id(.:format) web_console/console_sessions#show
PATCH /console_sessions/:id(.:format) web_console/console_sessions#update
PUT /console_sessions/:id(.:format) web_console/console_sessions#update
DELETE /console_sessions/:id(.:format) web_console/console_sessions#destroy
的routes.rb
Website::Application.routes.draw do
get "ratings/new"
get "down_votes/new"
get "thing/new"
get "good_comments/new"
get "good_comments/show"
get "bad_comments/new"
get "related_things/new"
get "things/new"
get "category_things/new"
get "thing_ratings/new"
get "category_ratings/new"
resources :subjects
get "subjects/show"
get "subject_things/new"
resources :categories
get "categories/results"
get "subjects/new"
root 'home_page#home'
get "all/things/new" => 'things#new'
get "all/allthings"
resources :things do
resources :good_comments
resources :bad_comments
resources :ratings
resources :up_votes
end
get "things/show"
get "things/results"
get 'things/random' => 'things#random'
end