我正在尝试我有一个简单的一对多关联。我试图通过嵌套表单更新属于相册的照片:
相册的编辑表格:
<%= 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 %>
它有效并且不能同时工作。显然标题和描述没有问题,并且formtastic正确地为相册中的每张照片制作一个复选框。但在这里,我已经有了第一个问题:
1)如何在复选框旁边显示照片? 我设法解决了这个问题:
<%= image_tag(builder.object.image.url(:album)) %>
显示图像。
这里有专辑和专辑模型:
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
照片模型:
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
专辑控制器:
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
抛出错误:
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行对应于update_attributes行。
感谢您的帮助。
燕姿
答案 0 :(得分:3)
我发现了错误。它在控制器中:
@album.update_attributes(params[:album][:photos_attributes])
应为:
@album.update_attributes(params[:album])
Duh ......:D