找不到 'id'= 的类别
Couldn't find Category with 'id'=
我的类别显示视图中显示了标签。当有人查看手机类别时，他们会在顶部看到标签，例如 iphone、apple、16gb、black 等。当有人点击 16gb 时，它应该会显示所有标有 16gb 的项目。
当有人点击标签时出现此错误。
ActiveRecord::RecordNotFound in CategoriesController#show
Couldn't find Category with 'id'=
def set_category
@category = Category.find(params[:id])
end
我不知道如何修复它？
我正在使用 act_as_taggable gem。
这里是分类控制器
class CategoriesController < ApplicationController
before_action :set_category, only: [:show]
before_action :admin_user, only: [:destroy, :index, :edit]
def index
@categories = Category.all
end
def show
if params[:tag]
@items = Item.tagged_with(params[:tag])
else
@items = Item.where(category_id: @category.id).order("created_at DESC")
end
end
def new
@category = Category.new
end
def edit
end
def create
@category = Category.new(category_params)
respond_to do |format|
if @category.save
format.html { redirect_to @category, notice: 'Category was successfully created.' }
format.json { render :show, status: :created, location: @category }
else
format.html { render :new }
format.json { render json: @category.errors, status: :unprocessable_entity }
end
end
end
def update
respond_to do |format|
if @category.update(category_params)
format.html { redirect_to @category, notice: 'Category was successfully updated.' }
format.json { render :show, status: :ok, location: @category }
else
format.html { render :edit }
format.json { render json: @category.errors, status: :unprocessable_entity }
end
end
end
def destroy
@category.destroy
respond_to do |format|
format.html { redirect_to categories_url, notice: 'Category was successfully destroyed.' }
format.json { head :no_content }
end
end
private
def set_category
@category = Category.find(params[:id])
end
def category_params
params.require(:category).permit(:name, :parent_id)
end
# Confirms an admin user.
def admin_user
redirect_to(root_url) unless current_user.try(:admin?)
end
end
这是我的分类展示视图。
<p id="notice"><%= notice %></p>
<div class = "col-md-3">
<h1>
<strong><%= @category.name %></strong>
</h1>
</div>
<div class = "col-md-9">
<div id="tag_cloud">
<% tag_cloud Item.tag_counts, %w[s m l] do |tag, css_class| %>
<%= link_to tag.name, tag_path(tag.name), class: css_class %>
<% end %>
</div>
</div>
<div class = "col-md-12">
<div class="line-separator"></div>
</div>
<div class = "col-md-12">
<div id="items" class="transitions-enabled">
<% @items.each do |item| %>
<div class="box panel panel-default">
<div class="itemlisttitle"><%= item.title %></div>
<%= link_to image_tag(item.image.url (:medium)), item %>
<div class ="panel-body">
<div class = "itemlistprice">$<%= item.price %></div>
<div class = "itemlistretailer"><%= image_tag item.user.avatar(:thumb) %> Retailer: <%= link_to item.user.username, item.user %></div>
</div>
</div>
<% end %>
</div>
</div>
这是路线。所以你可以看到标签是如何路由的。
Rails.application.routes.draw do
resources :categories
get 'password_resets/new'
get 'password_resets/edit'
get 'sessions/new'
resources :users
get 'user_items' => 'users#show_user_items'
root 'items#home'
get 'signup' => 'users#new'
get 'show' => 'users#show'
get 'login' => 'sessions#new'
post 'login' => 'sessions#create'
delete 'logout' => 'sessions#destroy'
resources :account_activations, only: [:edit]
resources :password_resets, only: [:new, :create, :edit, :update]
resources :items
get 'items_new' => 'items#new'
get 'tags/:tags', to: 'categories#show', as: :tag
Schema.rb
ActiveRecord::Schema.define(version: 20150731101116) do
create_table "categories", force: :cascade do |t|
t.string "name"
t.string "ancestry"
t.datetime "created_at", null: false
t.datetime "updated_at", null: false
end
add_index "categories", ["ancestry"], name: "index_categories_on_ancestry"
create_table "items", force: :cascade do |t|
t.string "title"
t.decimal "price"
t.text "description"
t.datetime "created_at", null: false
t.datetime "updated_at", null: false
t.integer "user_id"
t.string "image_file_name"
t.string "image_content_type"
t.integer "image_file_size"
t.datetime "image_updated_at"
t.integer "category_id"
end
add_index "items", ["user_id", "created_at"], name: "index_items_on_user_id_and_created_at"
add_index "items", ["user_id"], name: "index_items_on_user_id"
create_table "taggings", force: :cascade do |t|
t.integer "tag_id"
t.integer "taggable_id"
t.string "taggable_type"
t.integer "tagger_id"
t.string "tagger_type"
t.string "context", limit: 128
t.datetime "created_at"
end
add_index "taggings", ["tag_id", "taggable_id", "taggable_type", "context", "tagger_id", "tagger_type"], name: "taggings_idx", unique: true
add_index "taggings", ["taggable_id", "taggable_type", "context"], name: "index_taggings_on_taggable_id_and_taggable_type_and_context"
create_table "tags", force: :cascade do |t|
t.string "name"
t.integer "taggings_count", default: 0
end
add_index "tags", ["name"], name: "index_tags_on_name", unique: true
create_table "users", force: :cascade do |t|
t.string "username"
t.string "email"
t.datetime "created_at", null: false
t.datetime "updated_at", null: false
t.string "password_digest"
t.string "remember_digest"
t.boolean "admin", default: false
t.string "activation_digest"
t.boolean "activated", default: false
t.datetime "activated_at"
t.string "reset_digest"
t.string ">"
t.datetime "reset_sent_at"
t.string "avatar_file_name"
t.string "avatar_content_type"
t.integer "avatar_file_size"
t.datetime "avatar_updated_at"
t.text "description"
end
add_index "users", ["email"], name: "index_users_on_email", unique: true
end
您的 params[:id] 是空的。您应该将 tags 路线放在 categories 资源下：
resources :categories
member do
# run 'rake routes' to check
# the URL would be something like 'categiries/1/tags/16gb'
get 'tags/:tag'
end
end
或者您应该在控制器中将 params[:id] 更改为 params[:category_id] 并在创建 URL 时使用该参数：
# in your index.html.erb or somewhere where you generate URLs which lead to 'show' action
tag_path(tag.name, category_id: tag.category.id)
您没有将类别 ID 传递给 tags/:tags 路径，请将您的路线修正为：
get 'tags/:tags/:id', to: 'categories#show', as: :tag
浏览量：
<div class = "col-md-9">
<div id="tag_cloud">
<% tag_cloud Item.tag_counts, %w[s m l] do |tag, css_class| %>
<%= link_to tag.name, tag_path(tag.name, @category.id), class: css_class %>
<% end %>
</div>
</div>
更新：
When i click on a tag it the category show view loads with the url
localhost:3000/tags/16gb/1 which is good. But it still shows all the
items. Lets say i clicked on 16gb. It's still showing all mobile
mobies in the category, when it should only be showing its with 16gb
tagged. Any clues?
修正你的表演动作：
def show
@items = Item.where(category_id: @category.id, title: params[:tags]).order("created_at DESC")
end
我的类别显示视图中显示了标签。当有人查看手机类别时，他们会在顶部看到标签，例如 iphone、apple、16gb、black 等。当有人点击 16gb 时，它应该会显示所有标有 16gb 的项目。
当有人点击标签时出现此错误。
ActiveRecord::RecordNotFound in CategoriesController#show
Couldn't find Category with 'id'=
def set_category
@category = Category.find(params[:id])
end
我不知道如何修复它？
我正在使用 act_as_taggable gem。
这里是分类控制器
class CategoriesController < ApplicationController
before_action :set_category, only: [:show]
before_action :admin_user, only: [:destroy, :index, :edit]
def index
@categories = Category.all
end
def show
if params[:tag]
@items = Item.tagged_with(params[:tag])
else
@items = Item.where(category_id: @category.id).order("created_at DESC")
end
end
def new
@category = Category.new
end
def edit
end
def create
@category = Category.new(category_params)
respond_to do |format|
if @category.save
format.html { redirect_to @category, notice: 'Category was successfully created.' }
format.json { render :show, status: :created, location: @category }
else
format.html { render :new }
format.json { render json: @category.errors, status: :unprocessable_entity }
end
end
end
def update
respond_to do |format|
if @category.update(category_params)
format.html { redirect_to @category, notice: 'Category was successfully updated.' }
format.json { render :show, status: :ok, location: @category }
else
format.html { render :edit }
format.json { render json: @category.errors, status: :unprocessable_entity }
end
end
end
def destroy
@category.destroy
respond_to do |format|
format.html { redirect_to categories_url, notice: 'Category was successfully destroyed.' }
format.json { head :no_content }
end
end
private
def set_category
@category = Category.find(params[:id])
end
def category_params
params.require(:category).permit(:name, :parent_id)
end
# Confirms an admin user.
def admin_user
redirect_to(root_url) unless current_user.try(:admin?)
end
end
这是我的分类展示视图。
<p id="notice"><%= notice %></p>
<div class = "col-md-3">
<h1>
<strong><%= @category.name %></strong>
</h1>
</div>
<div class = "col-md-9">
<div id="tag_cloud">
<% tag_cloud Item.tag_counts, %w[s m l] do |tag, css_class| %>
<%= link_to tag.name, tag_path(tag.name), class: css_class %>
<% end %>
</div>
</div>
<div class = "col-md-12">
<div class="line-separator"></div>
</div>
<div class = "col-md-12">
<div id="items" class="transitions-enabled">
<% @items.each do |item| %>
<div class="box panel panel-default">
<div class="itemlisttitle"><%= item.title %></div>
<%= link_to image_tag(item.image.url (:medium)), item %>
<div class ="panel-body">
<div class = "itemlistprice">$<%= item.price %></div>
<div class = "itemlistretailer"><%= image_tag item.user.avatar(:thumb) %> Retailer: <%= link_to item.user.username, item.user %></div>
</div>
</div>
<% end %>
</div>
</div>
这是路线。所以你可以看到标签是如何路由的。
Rails.application.routes.draw do
resources :categories
get 'password_resets/new'
get 'password_resets/edit'
get 'sessions/new'
resources :users
get 'user_items' => 'users#show_user_items'
root 'items#home'
get 'signup' => 'users#new'
get 'show' => 'users#show'
get 'login' => 'sessions#new'
post 'login' => 'sessions#create'
delete 'logout' => 'sessions#destroy'
resources :account_activations, only: [:edit]
resources :password_resets, only: [:new, :create, :edit, :update]
resources :items
get 'items_new' => 'items#new'
get 'tags/:tags', to: 'categories#show', as: :tag
Schema.rb
ActiveRecord::Schema.define(version: 20150731101116) do
create_table "categories", force: :cascade do |t|
t.string "name"
t.string "ancestry"
t.datetime "created_at", null: false
t.datetime "updated_at", null: false
end
add_index "categories", ["ancestry"], name: "index_categories_on_ancestry"
create_table "items", force: :cascade do |t|
t.string "title"
t.decimal "price"
t.text "description"
t.datetime "created_at", null: false
t.datetime "updated_at", null: false
t.integer "user_id"
t.string "image_file_name"
t.string "image_content_type"
t.integer "image_file_size"
t.datetime "image_updated_at"
t.integer "category_id"
end
add_index "items", ["user_id", "created_at"], name: "index_items_on_user_id_and_created_at"
add_index "items", ["user_id"], name: "index_items_on_user_id"
create_table "taggings", force: :cascade do |t|
t.integer "tag_id"
t.integer "taggable_id"
t.string "taggable_type"
t.integer "tagger_id"
t.string "tagger_type"
t.string "context", limit: 128
t.datetime "created_at"
end
add_index "taggings", ["tag_id", "taggable_id", "taggable_type", "context", "tagger_id", "tagger_type"], name: "taggings_idx", unique: true
add_index "taggings", ["taggable_id", "taggable_type", "context"], name: "index_taggings_on_taggable_id_and_taggable_type_and_context"
create_table "tags", force: :cascade do |t|
t.string "name"
t.integer "taggings_count", default: 0
end
add_index "tags", ["name"], name: "index_tags_on_name", unique: true
create_table "users", force: :cascade do |t|
t.string "username"
t.string "email"
t.datetime "created_at", null: false
t.datetime "updated_at", null: false
t.string "password_digest"
t.string "remember_digest"
t.boolean "admin", default: false
t.string "activation_digest"
t.boolean "activated", default: false
t.datetime "activated_at"
t.string "reset_digest"
t.string ">"
t.datetime "reset_sent_at"
t.string "avatar_file_name"
t.string "avatar_content_type"
t.integer "avatar_file_size"
t.datetime "avatar_updated_at"
t.text "description"
end
add_index "users", ["email"], name: "index_users_on_email", unique: true
end
您的 params[:id] 是空的。您应该将 tags 路线放在 categories 资源下：
resources :categories
member do
# run 'rake routes' to check
# the URL would be something like 'categiries/1/tags/16gb'
get 'tags/:tag'
end
end
或者您应该在控制器中将 params[:id] 更改为 params[:category_id] 并在创建 URL 时使用该参数：
# in your index.html.erb or somewhere where you generate URLs which lead to 'show' action
tag_path(tag.name, category_id: tag.category.id)
您没有将类别 ID 传递给 tags/:tags 路径，请将您的路线修正为：
get 'tags/:tags/:id', to: 'categories#show', as: :tag
浏览量：
<div class = "col-md-9">
<div id="tag_cloud">
<% tag_cloud Item.tag_counts, %w[s m l] do |tag, css_class| %>
<%= link_to tag.name, tag_path(tag.name, @category.id), class: css_class %>
<% end %>
</div>
</div>
更新：
When i click on a tag it the category show view loads with the url localhost:3000/tags/16gb/1 which is good. But it still shows all the items. Lets say i clicked on 16gb. It's still showing all mobile mobies in the category, when it should only be showing its with 16gb tagged. Any clues?
修正你的表演动作：
def show
@items = Item.where(category_id: @category.id, title: params[:tags]).order("created_at DESC")
end