我有一个应用程序,其中包含使用acts_as_taggable gem的标签。我目前已经进行了设置,因此当在factoid的索引页面上时,单击任何标签会按该标记过滤factoids。我现在尝试做的是创建一个列出应用程序中所有标签的索引页面。这似乎很直接......
tag.rb
tags_controller.rb
tags/index.html.erb
问题是这导致我之前实现的搜索中断。如果还有其他需要的东西,请告诉我。
FactoidsController(它的索引部分)
class FactoidsController < ApplicationController
helper_method :sort_column, :sort_direction
before_filter :authenticate_user!
# GET /factoids
# GET /factoids.json
def index
if params[:tag]
@factoids = Factoid.tagged_with(params[:tag]).order(sort_column + ' ' + sort_direction).paginate(:per_page => 15, :page => params[:page])
else
@factoids = Factoid.search(params[:search]).order(sort_column + ' ' + sort_direction).paginate(:per_page => 15, :page => params[:page])
end
respond_to do |format|
format.html # index.html.erb
format.json { render json: @factoids }
end
end
def tagged
if params[:tag].present?
@factoids = Factoid.tagged_with(params[:tag])
else
@factoids = Factoid.postall
end
end
private
def sort_column
params[:sort] || "created_at"
end
def sort_direction
params[:direction] || "desc"
end
end
标记控制器
class TagsController < ApplicationController
helper_method :sort_column, :sort_direction
before_filter :authenticate_user!
# GET /factoids
# GET /factoids.json
def index
@tags = Tag.all
respond_to do |format|
format.html # index.html.erb
format.json { render json: @tags }
end
end
private
def sort_column
params[:sort] || "created_at"
end
def sort_direction
params[:direction] || "desc"
end
end
路线
QaApp::Application.routes.draw do
devise_for :users
resources :factoids
resources :tags
get "home/index"
match 'tagged' => 'factoids#tagged', :as => 'tagged'
get 'tags/:tag', to: 'factoids#index', as: :tag
root :to => 'home#index'
end
答案 0 :(得分:5)
您不需要经历创建标签模型和控制器的所有麻烦。 `acts-as-taggable-on提供了一种查找模型所有标签列表的方法。
2.0.0-p451 :008 > Factoid.tag_counts
ActsAsTaggableOn::Tag Load (2.0ms) SELECT tags.*, taggings.tags_count AS count FROM "tags" JOIN (SELECT taggings.tag_id, COUNT(taggings.tag_id) AS tags_count FROM "taggings" INNER JOIN factoids ON factoids.id = taggings.taggable_id WHERE (taggings.taggable_type = 'Factoid' AND taggings.context = 'tags') AND (taggings.taggable_id IN(SELECT factoids.id FROM "factoids")) GROUP BY taggings.tag_id HAVING COUNT(taggings.tag_id) > 0) AS taggings ON taggings.tag_id = tags.id
=> #<ActiveRecord::Relation [#<ActsAsTaggableOn::Tag id: 1, name: "tag">]>
这将返回所有标记对象的ActiveRecord :: Relation。您可以在其上运行地图以获取标签数组
Factoid.tag_counts.map(&:name)
=> ["tag"]