act-as-taggable-on gem不会将标记字符串持久化为编辑或显示

Question

我的video个对象上有标签。我可以通过我的表单创建新视频时提交标签，但是我们不会出现在我的视频展示页面，视频索引或视频编辑表单上，这让我觉得它们并没有出现在数据库中，但我认为它们已经存在。我不清楚我错过了什么或做错了什么。

模型/ video.rb

class Video < ActiveRecord::Base
  after_create { validates_presence_of :user, :post }
  belongs_to :user
  belongs_to :post
  has_many :comments
  validates :title, presence: true
  acts_as_taggable
end

的观点/视频/ index.html.erb

<%= will_paginate @videos %>

<div class="" id="tag_cloud">
  <% tag_cloud Video.tag_counts.sort { |x, y| x.name <=> y.name }, %w[s m l] do |tag, css_class| %>
  <%= link_to tag.name, tag_path(tag.name), class: css_class %>
  <% end %>
</div>

<div class="">
  <% @videos.each do |video| %>
    <div class="">
      <%= link_to video.title, video_path(video) %></br >
      <%= content_tag(:iframe, nil, src: "//www.youtube.com/embed/#{video.embed_id}") %>
      <p>Created by: <%= video.user.username %>, at: <%= video.created_at.strftime("%e, %b, %Y, %H:%M:%S %p") %></p>
      <% unless video.comments.last.nil? %>
        <%= video.comments.last.body %>
      <% end %>
      <p>
        Tags: <%= raw video.tag_list.map { |t| link_to t, tag_path(t) }.join(", ") %>
      </p>
    <% end %>
  </div>
</div>

的观点/视频/ _new.html.erb

<div class="">
  <% if current_user == @post.user || current_user.admin %>
    <h3>Add video</h3>
    <div class="">
      <%= form_for [@post, @video] do |f| %>
        <div class="">
          <%= f.label(:title, "Video Title") %></br >
          <%= f.text_field(:title) %>
        </div>

        <div class="">
          <%= f.label(:url, "Video Url") %></br >
          <%= f.text_field(:url) %>
        </div>

        <div class="">
          <%= f.label(:tag_list, "Tags (separated by commas)") %></br >
          <%= f.text_field(:tag_list, multiple: true) %>
        </div>

        <div class="">
          <%= f.submit("Submit Video") %>
        </div>
      <% end %>
    </div>
  <% end %>
</div>

的观点/视频/ show.html.erb

<div class="video-show">
  <%= @video.title %>
  <%= content_tag(:iframe, nil, src: "//www.youtube.com/embed/#{@video.embed_id}") %>
  <p>
    Tags: <%= @video.tag_list %>
  </p>
  <% if current_user == @video.user %>
    <%= link_to "Edit Video", edit_video_path(@video) %> |
    <%= link_to "Delete Video", video_path(@video), method: :delete, data: { confirm: "Are you sure?" } %> |
  <% end %>
  <% if current_user == @video.user %>
    <%= link_to("Back to Log", post_path(@post)) %> |
  <% end %>
  <%= link_to("Back to Index", videos_path) %>
</div>

控制器/ videos_controller.rb

  def index
    if params[:tag]
      @videos = Video.tagged_with(params[:tag]).page(params[:page]).per_page(10).order(created_at: "desc")
    else
      @videos = Video.all.page(params[:page]).per_page(10).order(created_at: "desc")
    end
  end

  private

  def video_params
    params.require(:video).permit(
      :title,
      :url,
      :tag_list,
    )
  end