Ruby on rails 在tags/show.html.erb中显示post_tag_链接

嗨，我正在制作公告牌系统，在轨道上使用acts_as_taggable_

我有个问题，如何在tags/show.html.erb中显示post_tag_链接

我的代码在下面

标记控制器.rb

def show
 @tag=ActsAsTaggableOn::Tag.find_by(name: params[:name])
 @posts = Post.tagged_with(@tag.name)
end

<h1><%= @tag.name %></h1><%= link_to "タグ一覧",tags_path %>
<div><%= render @posts %></div>

 acts_as_taggable_on :tags
 acts_as_taggable
 after_validation :save_tags

 def save_tags
  array = self.check_taggable_word(self.title)
  self.tag_list.add(array, parse: true)
 end

 def tag_lists
  tag_lists = self.tag_list
 end

 def check_taggable_word(text)
  ary = Array.new
  nm = Natto::MeCab.new
  nm.parse(text) do |n|
   ary<<n.surface
  end 
  tags = ActsAsTaggableOn::Tag.pluck(:name) 
  return ary & tags
 end

Rails.application.routes.draw do
  root 'static_pages#home'
  get '/about' => 'static_pages#about'
  get '/contact' => 'static_pages#contact'
  resources :categories do
   resources :posts
  end
  resources :posts do
   resources :comments
   resources :tags
  end
  get 'tags/:name' => 'tags#show'
  resources :tags, only: [:index, :show]
 end

def create
category_id = params[:post][:category_id]
if category_id.present? && Category.find_by(id: category_id)
  @category = Category.find_by(id: category_id)
else
  @post = Post.new(
      :title  => params[:post][:title],
      :name   => params[:post][:name]
    )
  @post.valid?
  render :action => "new" and return 
end

@post = Post.post_create(post_params)
@post.ip = request.remote_ip

if @post.name.present?
else
  @post.name = “no-name”
end

respond_to do |format|
  if @post.save

    format.html { redirect_to @post, notice: ‘done’ }
    format.json { render :show, status: :created, location: @post }
  else
    format.html { render :new }
    format.json { render json: @post.errors, status: :unprocessable_entity }
  end
end

标记show.html.erb

def show
 @tag=ActsAsTaggableOn::Tag.find_by(name: params[:name])
 @posts = Post.tagged_with(@tag.name)
end

<h1><%= @tag.name %></h1><%= link_to "タグ一覧",tags_path %>
<div><%= render @posts %></div>

 acts_as_taggable_on :tags
 acts_as_taggable
 after_validation :save_tags

 def save_tags
  array = self.check_taggable_word(self.title)
  self.tag_list.add(array, parse: true)
 end

 def tag_lists
  tag_lists = self.tag_list
 end

 def check_taggable_word(text)
  ary = Array.new
  nm = Natto::MeCab.new
  nm.parse(text) do |n|
   ary<<n.surface
  end 
  tags = ActsAsTaggableOn::Tag.pluck(:name) 
  return ary & tags
 end

Rails.application.routes.draw do
  root 'static_pages#home'
  get '/about' => 'static_pages#about'
  get '/contact' => 'static_pages#contact'
  resources :categories do
   resources :posts
  end
  resources :posts do
   resources :comments
   resources :tags
  end
  get 'tags/:name' => 'tags#show'
  resources :tags, only: [:index, :show]
 end

def create
category_id = params[:post][:category_id]
if category_id.present? && Category.find_by(id: category_id)
  @category = Category.find_by(id: category_id)
else
  @post = Post.new(
      :title  => params[:post][:title],
      :name   => params[:post][:name]
    )
  @post.valid?
  render :action => "new" and return 
end

@post = Post.post_create(post_params)
@post.ip = request.remote_ip

if @post.name.present?
else
  @post.name = “no-name”
end

respond_to do |format|
  if @post.save

    format.html { redirect_to @post, notice: ‘done’ }
    format.json { render :show, status: :created, location: @post }
  else
    format.html { render :new }
    format.json { render json: @post.errors, status: :unprocessable_entity }
  end
end

附加信息 posts\u controller.rb

def show
 @tag=ActsAsTaggableOn::Tag.find_by(name: params[:name])
 @posts = Post.tagged_with(@tag.name)
end

<h1><%= @tag.name %></h1><%= link_to "タグ一覧",tags_path %>
<div><%= render @posts %></div>

 acts_as_taggable_on :tags
 acts_as_taggable
 after_validation :save_tags

 def save_tags
  array = self.check_taggable_word(self.title)
  self.tag_list.add(array, parse: true)
 end

 def tag_lists
  tag_lists = self.tag_list
 end

 def check_taggable_word(text)
  ary = Array.new
  nm = Natto::MeCab.new
  nm.parse(text) do |n|
   ary<<n.surface
  end 
  tags = ActsAsTaggableOn::Tag.pluck(:name) 
  return ary & tags
 end

Rails.application.routes.draw do
  root 'static_pages#home'
  get '/about' => 'static_pages#about'
  get '/contact' => 'static_pages#contact'
  resources :categories do
   resources :posts
  end
  resources :posts do
   resources :comments
   resources :tags
  end
  get 'tags/:name' => 'tags#show'
  resources :tags, only: [:index, :show]
 end

def create
category_id = params[:post][:category_id]
if category_id.present? && Category.find_by(id: category_id)
  @category = Category.find_by(id: category_id)
else
  @post = Post.new(
      :title  => params[:post][:title],
      :name   => params[:post][:name]
    )
  @post.valid?
  render :action => "new" and return 
end

@post = Post.post_create(post_params)
@post.ip = request.remote_ip

if @post.name.present?
else
  @post.name = “no-name”
end

respond_to do |format|
  if @post.save

    format.html { redirect_to @post, notice: ‘done’ }
    format.json { render :show, status: :created, location: @post }
  else
    format.html { render :new }
    format.json { render json: @post.errors, status: :unprocessable_entity }
  end
end

结束

实施可标记的行为

包括在

post.rb

模型或

user.rb

模型中

class Post
 acts_as_taggable_on :tags
end

在

posts\u controller

或

user\u controller

中包含以下强参数

class PostsController < ApplicationController
  def user_params
    params.require(:posts).permit(:tag_list) ## Rails 4 strong params usage
  end
end

将标签添加到新的@post

@post.tag_list.add("history")
@post.tag_list.add("england")
@post.save

检查标签

@post.tag_list
@post.tags

这应该是预期的输出，如果在标记创建过程中出现问题，您需要停止并修复它。如果此标记仅用于此@post中，则标记计数应为1

=> [#<ActsAsTaggableOn::Tag id: 1, name: "history", taggings_count: 1>,
 #<ActsAsTaggableOn::Tag id: 2, name: "england", taggings_count: 1>]

我知道您必须检查@tags是否被填充，所以在rails控制台中执行以下操作（我测试了它，它返回了以下内容）。如果它是空的，它就不能工作。 @tags=Post.tag\u计数（：tags）

这是模块

module PostsHelper
  include ActsAsTaggableOn::TagsHelper
end

---

我做了你的代码，然后这个错误显示谢谢你Fabrizio！我是日本学生，两个月前刚开始学习编码：）我想更努力地写代码：）谢谢！！！我刚刚在上面添加了我的帖子_controller.rb！非常感谢法布里齐奥！！我会先试试：）是的，我也不知道。。。是否有必要在Post和Tag之间建立父子关系？hi Fabrizio。我试过。。。然而，我的标签不算“taggings_count”，我不知道为什么。这是我在控制台中检查的内容@tag=>#你好，我刚刚添加了def。但仍会显示此错误。在post.rb的self.tag_list.add的save_tags方法之后，我还没有保存标签。你怎么认为？？？若我在self.tag\u list.add之后添加self.method，那个么save方法将实现为循环…我尝试了上面的代码，然后显示了这个错误…哦，对不起。。。我忘了。。。然后显示了这个错误