允许上传空文件

app/models/attachment.rb

@@ -227,7 +227,8 @@ class Attachment < ActiveRecord::Base
   def file=(incoming_file)
     unless incoming_file.nil?
       @temp_file = incoming_file
-      if @temp_file.size > 0
+      # 允许上传文件大小为0的文件
+      #if @temp_file.size > 0
         if @temp_file.respond_to?(:original_filename)
           self.filename = @temp_file.original_filename
           self.filename.force_encoding("UTF-8") if filename.respond_to?(:force_encoding)
@@ -239,7 +240,7 @@ class Attachment < ActiveRecord::Base
           self.content_type = Redmine::MimeType.of(filename)
         end
         self.filesize = @temp_file.size
-      end
+      #end
     end
   end
 
@@ -255,7 +256,8 @@ class Attachment < ActiveRecord::Base
   # Copies the temporary file to its final location
   # and computes its MD5 hash
   def files_to_final_location
-    if @temp_file && (@temp_file.size > 0)
+    # # 允许上传文件大小为0的文件
+    if @temp_file# && (@temp_file.size > 0)
       self.disk_directory = target_directory
       self.disk_filename = Attachment.disk_filename(filename, disk_directory)
       logger.info("Saving attachment '#{self.diskfile}' (#{@temp_file.size} bytes)")