Rails:搜索所有标记有特定标记的图像

时间:2012-09-04 11:00:08

标签: ruby-on-rails ruby-on-rails-3 search tags

我有3个型号:

class Image < ActiveRecord::Base
  attr_accessible :name, :size, :image

  has_many :taggings, :dependent => :destroy
  has_many :tags, :through => :taggings
end

class Tag < ActiveRecord::Base
  attr_accessible :name
  has_many :taggings, :dependent => :destroy
  has_many :images, :through => :taggings
end

class Tagging < ActiveRecord::Base
  belongs_to :image
  belongs_to :tag
  attr_accessible :image_id, :tag_id
end

现在我添加了一些带有相应(prefedined)标签的图像,images / new的相关代码是:

%div.field
  = f.label "Tag"
  %br/
  - for tag in Tag.all
    = check_box_tag "image[tag_ids][]", tag.id, @image.tags.include?(tag)  
    = tag.name

我现在如何搜索所有具有特定标签的图像?我需要一个@images来显示所有用一个或多个预定义标签标记的图像。我在复选框的帮助下选择了这些标签:

%h1
  Search an image
%p
  = form_tag '/tagsearch', :method => 'get' do
    - for tag in Tag.all
      = check_box_tag 'tag_ids[]', tag.id
      = tag.name
    = submit_tag "Search Images"

因此,此搜索的参数现在是(例如,使用tag_ids 2和3搜索所有图像):

{"utf8"=>"✓",
 "tag_ids"=>["2", 
 "3"],
 "commit"=>"Search Images"}

执行此类图像搜索的最佳方法是什么?

1 个答案:

答案 0 :(得分:4)

我认为这应该有效:

images = Image.includes(:tags).where('tags.id' => params['tag_ids']).all