当我尝试提交一个简单的嵌套表单时,Rails 给我一个错误:
NoMethodError in UserController#update
undefined method `[]' for #<ActionDispatch::Http::UploadedFile:0x3f4e318>
参数是:
{
"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"
}
用户控制器#update
def update
@user = User.new(params[:user])
@user.save
end
表单(它使用通用表单生成器。也许这会导致错误?)
<%= 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 %>
用户模型
class User < ActiveRecord::Base
attr_accessible :name, :pics_attributes
has_many :pics
accepts_nested_attributes_for :pics
end
图片模型
class Pics < ActiveRecord::Base
belongs_to :user
attr_accessible :image
mount_uploader :image, PicUploader
end
在哪里挖掘错误?
上面的代码是针对 Carrierwave 的,但我尝试切换到 Paperclip 并且错误是相同的。