ruby-on-rails - 使用 acts_as_taggable 在 Ruby on Rails 4 中保存标签时遇到问题

Question

我正在尝试将 act_as_taggable 实现到我的 Rails 4 应用程序中(基于微博模型)，但该程序未保存标签，因此这些标签不可见。标签和标签表已被收集并存在于数据库中，但我实现的代码似乎都没有在提交表单时保存标签或创建标签。我按照此 tutorial 中的步骤操作几乎完全一样，但有些东西似乎不起作用。

我不确定这是不是以 Rails 4 为中心的问题和/或是否与 Rails 中使用的缺少“attr_accessible”代码有关。由于代码示例没有指定向 microposts 表添加任何内容，我只能假设连接是在其他地方建立的，但我应该在哪里以及如何修复我不知道的(也许在 microposts_helper.rb 中？)。

提前致谢。非常感谢任何帮助。

相关代码片段

gem 文件

...

gem 'acts-as-taggable-on', '~> 2.4.1'

...

微博.rb

   class Micropost < ActiveRecord::Base     
   belongs_to :user  
   acts_as_taggable   
   acts_as_taggable_on :tags
   ... 
   end

microposts_controller.rb

  before_action :signed_in_user, only: [:create, :destroy]
  before_action :correct_user,   only: :destroy

  def index
    if params[:tag]
      @microposts = Micropost.tagged_with(params[:tag])
    else
      @microposts = Micropost.all
    end
  end

  def create
    @micropost = current_user.microposts.build(micropost_params)
    if @micropost.save
      flash[:success] = "Micropost created!"
      redirect_to current_user
    else
      @feed_items = []
      render 'users/show'
    end
  end

  def destroy
    @micropost.destroy
    redirect_to user_url
  end

  def tagged
    if params[:tag].present? 
      @microposts = Micropost.tagged_with(params[:tag])
    else 
      @microposts = Micropost.postall
    end  
  end

  private

    def micropost_params
      params.require(:micropost).permit(:content)
    end

    def correct_user
      @micropost = current_user.microposts.find_by(id: params[:id])
      redirect_to user_url if @micropost.nil?
    end
end

microposts_helper.rb

module MicropostsHelper
    include ActsAsTaggableOn::TagsHelper
end

_microposts_form.html.rb

<%= form_for(@micropost) do |f| %>
  ...
  <div class="field">
    ...
    <%= f.label :tags %>
    <%= f.text_field :tag_list %>
  </div>
  <%= f.submit "Post", class: "btn btn-large btn-primary" %>
<% end %>

_micropost.erb.html

<li>
  <span class="content"><%= micropost.content %></span>
  <span class="tags">
    <%= micropost.tag_list %>
  </span>
...
</li>

架构.rb

...
create_table "microposts", force: true do |t|
    t.string   "content"
    t.integer  "user_id"
    t.datetime "created_at"
    t.datetime "updated_at"
  end

  add_index "microposts", ["user_id", "created_at"], name: "index_microposts_on_user_id_and_created_at"
...
  create_table "taggings", force: true 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"], name: "index_taggings_on_tag_id"
  add_index "taggings", ["taggable_id", "taggable_type", "context"], name: "index_taggings_on_taggable_id_and_taggable_type_and_context"

  create_table "tags", force: true do |t|
    t.string "name"
  end
...

路线.rb

Dev::Application.routes.draw do
    ...
    resources :microposts, only: [:create, :destroy]
    ...
    match 'tagged', to: 'microposts#tagged', :as => 'tagged', via: 'get' 
end

Answer 1

如果我正确地理解了这个问题，那么您基本上需要做的就是告诉推荐的参数保护模型(strong_parameters)关于可作为标记的 gem。你已经完成了一半:

private

    def micropost_params
      params.require(:micropost).permit(:content)
    end

    [...]
end

只需添加:

private

    def micropost_params
     params.require(:micropost).permit(:content, :tag_list => [])
    end

    [...]
end

此外，您可能想在 routes.rb 文件中添加一件事。替换行:

resources :microposts, only: [:create, :destroy]

与:

resources :microposts, only: [:create, :destroy, :tag]

让我知道这些建议是否有效。祝你好运!