渲染帖子與指定的標記

Question

如果我使用此代碼爲我的應用程序設置標記系統，然後我將如何呈現與我分配給它們的標記的帖子。舉例來說，如果我分配了一個運動的標籤，以一對夫婦的職位，我將如何再渲染分配給它的運動標籤的所有帖子

rails g model tag name:string 
rails g model tagging article_id:integer tag_id:integer 
rake db:migrate 

class Tagging < ActiveRecord::Base 
    belongs_to :article 
    belongs_to :tag 
end 

class Tag < ActiveRecord::Base 
    has_many :taggings, :dependent => :destroy 
    has_many :articles, :through => :taggings 
end 

class Article < ActiveRecord::Base 
    has_many :comments, :dependent => :destroy 
    has_many :taggings, :dependent => :destroy 
    has_many :tags, :through => :taggings 
    validates_presence_of :name, :content 
    attr_writer :tag_names 
    after_save :assign_tags 

    def tag_names 
    @tag_names || tags.map(&:name).join(' ') 
    end 

    private 

    def assign_tags 
    if @tag_names 
     self.tags = @tag_names.split(/\s+/).map do |name| 
     Tag.find_or_create_by_name(name) 
     end 
    end 
    end 
end 

<p> 
    <%= f.label :tag_names %><br /> 
    <%= f.text_field :tag_names %> 
</p> 

Answer 1

也許是這樣的：

# TagsController 
def show 
    @articles = Tag.find_by_name('sports').articles 
end 

# tags/show.html.haml 
- @articles.each do |article| 
    = render :partial => :article