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私の has_many : Releases/Products/Tracks の関連付けを通じて、トラックが削除され、releases_tracks / products_tracks テーブルに孤立した関連付けが残っているようです。どこが間違っているのかわかりません。デフォルトの動作は関連付けのみを削除することだと思いました。誰でも助けてもらえますか？

私のモデル:

 class Track < ActiveRecord::Base
   has_many :releases_tracks
   has_many :tracks, :through => :releases_tracks

   has_many :products_tracks
   has_many :products, :through => :products_tracks 
 end

 class Release < ActiveRecord::Base
   has_many :releases_tracks
   has_many :tracks, :through => :releases_tracks
 end

 class Product < ActiveRecord::Base
   has_many :products_tracks
   has_many :tracks, :through => :products_tracks
   before_save do
     self.track_ids = self.releases_track_ids
   end
 end

 class ProductsTrack < ActiveRecord::Base
   belongs_to :product
   belongs_to :track
 end

 class ReleasesTrack < ActiveRecord::Base
   belongs_to :release
   belongs_to :track
 end

My Track Controller (破棄アクション用):

 class TracksController < ApplicationController
  before_filter :get_track_parent

 def destroy
   @track = @parent.tracks.find(params[:id])
   @track.destroy
   redirect_to @parent  
 end

 private

 def get_track_parent
   if params[:product_id].present?
   @parent = Product.find(params[:product_id])
   elsif params[:release_id].present?
   @parent = Release.find(params[:release_id])
   end
 end
 end

リリースビューの破棄リンク:

 <%= link_to image_tag("icons/delete.png"), release_track_path(@release,track), :confirm => 'Are you sure?', :method => :delete %>

そして最後に、製品ビューの破棄リンク:

 <%= link_to image_tag("icons/delete.png"), product_track_path(@product,track), :confirm => 'Are you sure?', :method => :delete %>
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1 に答える 1

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まず、:dependent => :destroy関連付けのオプションが必要です。

class Track < ActiveRecord::Base
  has_many :releases_tracks, :dependent => :destroy
  has_many :releases, :through => :releases_tracks # also note you had here :tracks instead of :releases

  has_many :products_tracks, :dependent => :destroy
  has_many :products, :through => :products_tracks 
end

また、リリースまたは製品を削除するときにトラックを削除する場合は、次:dependent => :destroyの sを追加します。

class Release < ActiveRecord::Base
  has_many :releases_tracks, :dependent => :destroy
  has_many :tracks, :through => :releases_tracks
end

class Product < ActiveRecord::Base
  has_many :products_tracks, :dependent => :destroy
  has_many :tracks, :through => :products_tracks
  before_save do
    self.track_ids = self.releases_track_ids
  end
end

class ProductsTrack < ActiveRecord::Base
  belongs_to :product
  belongs_to :track, :dependent => :destroy
end

class ReleasesTrack < ActiveRecord::Base
  belongs_to :release
  belongs_to :track, :dependent => :destroy
end
于 2012-04-04T16:19:36.610 に答える