缺陷添加缩略图显示

app/helpers/application_helper.rb

@@ -182,11 +182,27 @@ module ApplicationHelper
   end
 
   def thumbnail_tag(attachment)
-    link_to image_tag(thumbnail_path(attachment)),
-      named_attachment_path(attachment, attachment.filename),
+    imagepath = named_attachment_path(attachment, attachment.filename)
+    link_to image_tag(imagepath),
+            imagepath ,
       :title => attachment.filename
   end
 
+  # 图片缩略图链接
+  def thumbnail_small_tag(attachment)
+    imagesize = attachment.thumbnail(:size => "200*200")
+    imagepath = named_attachment_path(attachment, attachment.filename)
+    if imagesize
+      link_to image_tag(imagesize),
+              imagepath,
+              :title => attachment.filename
+    else
+      link_to image_tag(imagepath , height: '200', width: '250'),
+              imagepath,
+              :title => attachment.filename
+    end
+  end
+
   def toggle_link(name, id, options={})
     onclick = "$('##{id}').toggle(); "
     onclick << (options[:focus] ? "$('##{options[:focus]}').focus(); " : "this.blur(); ")

app/models/attachment.rb

@@ -228,7 +228,6 @@ class Attachment < ActiveRecord::Base
       end
       size = 100 unless size > 0
       target = File.join(self.class.thumbnails_storage_path, "#{id}_#{digest}_#{size}.thumb")
-
       begin
         Redmine::Thumbnail.generate(self.diskfile, target, size)
       rescue => e

app/views/attachments/_links.html.erb

@@ -33,7 +33,7 @@
   <% if images.any? %>
   <div class="thumbnails">
     <% images.each do |attachment| %>
-      <div><%= thumbnail_tag(attachment) %></div>
+      <div><%= thumbnail_small_tag(attachment) %></div>
     <% end %>
   </div>
   <% end %>