1
我想我有一個簡單的一對多關聯。我試圖更新,通過嵌套形式屬於一個相冊中的照片:acceptable_nested_attributes_for與formtastic和回形針
的相冊編輯表單:
<%= semantic_form_for(@album, :url => user_album_path(@user, @album), :html => {:method => :put}) do |f| %>
<%= f.inputs do %>
<%= f.input :title %>
<%= f.input :description %>
<% end %>
<%= f.inputs :for => :photos do |builder|%>
<%= builder.input :_destroy, :as => :boolean %>
<% end %>
<%= f.submit "Submit", :disabled_with => 'Submiting...' %>
<% end %>
它的工作原理和不工作在同一時間。很明顯,標題和說明沒有問題,並且formtastic正確地爲相冊中的每張照片製作複選框。但在這裏我已經有了我的第一個問題:
1)如何顯示旁邊的複選框的照片? 我設法解決自己:
<%= image_tag(builder.object.image.url(:album)) %>
裏顯示的圖像。
這裏的專輯和相冊樣板:
class Album < ActiveRecord::Base
belongs_to :user
has_many :photos, :dependent => :destroy
#attr_accessible :title, :description
validates_presence_of :title, :description
accepts_nested_attributes_for :photos, :allow_destroy => true
end
和照片模式:
class Photo < ActiveRecord::Base
belongs_to :user
belongs_to :album
has_attached_file :image, :styles => { :original => ["441x800>", :png],
:album => ["140x140#", :png],
:tiny => ["16x16#", :png] }
validates_attachment_presence :image
validates_attachment_content_type :image, :content_type => ["image/jpeg", "image/png", "image/gif"]
end
專輯控制器:
def update
@user = User.find(params[:user_id])
@album = @user.albums.find(params[:id])
if @album.update_attributes(params[:album][:photos_attributes])
flash[:success] = t('users.flash.album_updated')
redirect_to @user
else
render :edit
end
end
錯誤拋出:
ActiveRecord::UnknownAttributeError in AlbumsController#update
unknown attribute: 0
Rails.root: /Users/stefanohug/orangerie
Application Trace | Framework Trace | Full Trace
app/controllers/albums_controller.rb:50:in `update'
Request
Parameters:
{"_snowman"=>"☃",
"_method"=>"put",
"authenticity_token"=>"bE4AidmbaVoG9XBqolCxheyWtd7qeltkIpMRgd8c4Fw=",
"album"=>{"title"=>"lol",
"description"=>"hihi",
"photos_attributes"=>{"0"=>{"_destroy"=>"1",
"id"=>"72"},
"1"=>{"_destroy"=>"1",
"id"=>"73"},
第50行對應於update_attributes行。
感謝您的幫助人。
Stef