狂欢：创造新的资产失败

Question

我正在尝试为 Spree 2.3（设计师）中的第三个角色创建自定义表单。设计师创建新产品和变体，然后上传该变体的图像。到目前为止，我的努力都是徒劳的。

如何为变体创建新资产？

错误

ActiveRecord::UnknownAttributeError in Designers::SpreeAssetsController#create
unknown attribute: attachment
Extracted source (around line #11):
def create      
  @asset = Spree::Asset.new(asset_params) #line 11
  ...
end

请求参数

{"utf8"=>"✓",
"authenticity_token"=>"XXX=",
"asset"=>{"attachment"=>#<ActionDispatch::Http::UploadedFile:0x0000010f6c34b8 @tempfile=#<Tempfile:/var/folders/xk/r14w_thd2bn8vxch294zzn040000gn/T/RackMultipart20140731-5542-fgfzhn>,
@original_filename="DSCN0220.JPG",
@content_type="image/jpeg",
@headers="Content-Disposition: form-data; name=\"asset[attachment]\"; filename=\"DSCN0220.JPG\"\r\nContent-Type: image/jpeg\r\n">},
"commit"=>"Create"}

控制器

#app/controllers/designers/spree_assets_controller.rb
def create      
  @asset = Spree::Asset.new(asset_params)
...
end

private

def asset_params
  params.require(:asset).permit(:attachment)
end

查看

<%= form_for @asset, url: designers_spree_assets_path, method: :post do |f| %>
  <%= f.label :attachment, "Upload image" %></br>
  <%= f.file_field :attachment %></br>
  <%= f.submit 'Create' %>
<% end %>

Answer 1

在具有图像的模型中创建以下关联：

has_many :images, :as => :viewable, :order => :position, :dependent => :destroy, :class_name => "Spree::Image"

这就是 Variant 模型具有 :images 的方式，请通过bundle open spree 获取更多信息。

然后创建一个嵌套表单来创建新的附件，我更喜欢simple_form

= simple_form_for @asset, :html => {:multipart => true } do |m|
  = m.simple_fields_for :images do |p|
    = p.file_field :attachment

或者更简单的方法是在模型中包含回形针has_attached_file 方法。

以下来自图像模型，只是为了让您了解 Spree 中如何处理产品图像。

has_attached_file :attachment,
                  :styles => { :mini => '48x48>', :small => '100x100>', :product => '240x240>', :large => '600x600>' },
                  :default_style => :product,
                  :url => '/spree/products/:id/:style/:basename.:extension',
                  :path => ':rails_root/public/spree/products/:id/:style/:basename.:extension',
                  :convert_options => { :all => '-strip -auto-orient' }

根据需要进行定制。

希望对您有所帮助！