Question

型号：

class User < ActiveRecord::Base
  attr_accessible :soundcloud_access_token, :soundcloud_expires_at, :soundcloud_refresh_token, :soundcloud_user_id, :soundcloud_username, :photo

  has_one :photo
  accepts_nested_attributes_for :photo

查看：

=form_for :user, :url => user_path(@user), :method => :put, :class => 'form-horizontal' do |f|
  %legend Edit Profile
  =f.fields_for :photo do |photo|
    %div.control-group
      =photo.label :image
      %div.controls
        =photo.file_field :image
  =f.submit 'Submit'

控制器：

  def update
    @user = User.find(params[:id])
    @user.update_attributes(params[:user])
    redirect_to @user
  end

PARAMS：

{"utf8"=>"✓", "_method"=>"put", "authenticity_token"=>"nqxi4QKr7g7j0xO41lZqCHvQrGHSd7AXqxEZyskxag8=", "user"=>{"photo"=>{"image"=>#<ActionDispatch::Http::UploadedFile:0xb1d442a0 @original_filename="Dark-Evil-41694.jpg", @content_type="image/jpeg", @headers="Content-Disposition: form-data; name=\"user[photo][image]\"; filename=\"Dark-Evil-41694.jpg\"\r\nContent-Type: image/jpeg\r\n", @tempfile=#<File:/tmp/RackMultipart20120908-8454-qgtagx>>}}, "commit"=>"Submit", "action"=>"update", "controller"=>"users", "id"=>"1"}

错误：

Photo(#-646360948) expected, got ActiveSupport::HashWithIndifferentAccess(#76750090)

我在这里做错了什么？

Answer 1

使用

{p> :photo_attributes而不是:photo

中的attr_accessible

attr_accessible :soundcloud_access_token, :soundcloud_expires_at, :soundcloud_refresh_token, :soundcloud_user_id, :soundcloud_username, :photo_attributes

这个（调查员Samo自己的解决方案:)）

{p> :photo_attributes而不是:photo

中的fields_for

我不需要这个步骤轨道3.2，Samo的版本问题在3.2中很好用

文档中的更多细节

http://api.rubyonrails.org/classes/ActionView/Helpers/FormHelper.html#method-i-fields_for

http://api.rubyonrails.org/classes/ActiveRecord/NestedAttributes/ClassMethods.html#label-Using+with+attr_accessible

无法获取要保存的嵌套属性

1 个答案: