當我嘗試提交一個簡單的嵌套形式的Rails給我一個錯誤:Rails的上傳與嵌套形式
NoMethodError in UserController#update
undefined method `[]' for #<ActionDispatch::Http::UploadedFile:0x3f4e318>
,而params是:
{
"utf8"=>"✓",
"authenticity_token"=>"HFWawKp4RH7+AFV0yQ1cXpzxHDfubKTKkiDiS6QKnJk=",
"user"=> {
"name"=>"Alex",
"pics_attributes"=> {
"pic"=>#<ActionDispatch::Http::UploadedFile:0x3f4e318
@original_filename="Beautiful Sky_thumb.jpg",
@content_type="image/jpeg",
@headers="Content-Disposition: form-data; name=\"user[pics_attributes][pic]\"; filename=\"Beautiful Sky_thumb.jpg\"\r\nContent-Type: image/jpeg\r\n",
@tempfile=#<File:C:/Users/Alex/AppData/Local/Temp/RackMultipart20120824-4784-5rmxid>>
}
},
"commit"=>"Save User"
}
UserController中#更新
def update
@user = User.new(params[:user])
@user.save
end
窗體(它使用通用窗體構建器,可能會導致錯誤?)
<%= form_for :user, url: '/user/update', html: {multipart: true} do |user| %>
<%= user.hidden_field :name, {value: 'Alex'} %>
<%= user.fields_for :pics_attributes do |pic| %>
<%= pic.file_field :pic %>
<% end %>
<%= user.submit %>
<% end %>
用戶模型
class User < ActiveRecord::Base
attr_accessible :name, :pics_attributes
has_many :pics
accepts_nested_attributes_for :pics
end
照片管理模型
class Pics < ActiveRecord::Base
belongs_to :user
attr_accessible :image
mount_uploader :image, PicUploader
end
哪裏挖一個錯誤?
上面的代碼是用於Carrierwave,但我試圖切換到回形針和錯誤是相同的。
解決這個骯髒的黑客:http://stackoverflow.com/questions/8514970/undefined-method-stringify-keys –