ruby-on-rails - 载波。无法使用 STI 保存文件

Question

我有型号 Document :

class Document < ActiveRecord::Base
  belongs_to :company
  validates :name, :presence => true
end

还有两个类继承自 Document :
License :

class License < Document
  mount_uploader :file, DocumentUploader
end

和 Certificate

class Certificate < Document
  mount_uploader :file, DocumentUploader
end

当我尝试做 current_company.licenses.create(...)或对证书执行相同操作，除了 file 之外，始终保存所有参数。 ，始终是 nil
我也试过挂载 file内部 Document模型...请帮帮我。

这是日志:

Started POST "/companies/1/verified" for 127.0.0.1 at Mon Mar 19 09:33:41 +0200 2012
Processing by CompaniesController#verified as HTML
  Parameters: {"verified"=>{"certificate"=>{"name"=>"Certificate", "file"=>"test.png"}, "insured"=>"2000000", "suppliers"=>"", "license"=>{"name"=>"License", "file"=>"test.png"}}, "authenticity_token"=>"0hIn41Tjonm/AXZBKM1PE/tjQxJDLqZaojMTHDoZq2k=", "id"=>"1", "utf8"=>"✓", "commit"=>"Update verifications"}
  Company Load (0.7ms)  SELECT "companies".* FROM "companies" WHERE "companies"."id" = 1 LIMIT 1
   (0.1ms)  BEGIN
  SQL (0.8ms)  INSERT INTO "documents" ("company_id", "created_at", "file", "name", "type", "updated_at", "verified") VALUES ($1, $2, $3, $4, $5, $6, $7) RETURNING "id"  [["company_id", 1], ["created_at", Mon, 19 Mar 2012 07:33:41 UTC +00:00], ["file", nil], ["name", "License"], ["type", "License"], ["updated_at", Mon, 19 Mar 2012 07:33:41 UTC +00:00], ["verified", false]]
   (0.6ms)  COMMIT
   (0.1ms)  BEGIN
  SQL (0.5ms)  INSERT INTO "documents" ("company_id", "created_at", "file", "name", "type", "updated_at", "verified") VALUES ($1, $2, $3, $4, $5, $6, $7) RETURNING "id"  [["company_id", 1], ["created_at", Mon, 19 Mar 2012 07:33:41 UTC +00:00], ["file", nil], ["name", "Certificate"], ["type", "Certificate"], ["updated_at", Mon, 19 Mar 2012 07:33:41 UTC +00:00], ["verified", false]]
   (0.4ms)  COMMIT
Redirected to http://localhost:3000/company/profile
Completed 302 Found in 18ms (ActiveRecord: 3.3ms)

谢谢。

Answer 1

您确定您已将用于上传文件的表单设置为具有多部分负载吗？

如果不是，文件将不会在提交时发送，rails 将只接收文本表单数据。您需要在 form_helper 标签内添加。

:html => {:multipart => true}