修改bug(项目--缺陷：更新图片时在历史记录中没有相关记录，删除图片只显示一个更新时间也不合理)

Signed-off-by: alan <547533434@qq.com>

app/helpers/issues_helper.rb

@@ -227,7 +227,7 @@ module IssuesHelper
     strings = []
     values_by_field = {}
     details.each do |detail|
-      unless detail.property == 'attachment'
+
       if detail.property == 'cf'
         field_id = detail.prop_key
         field = CustomField.find_by_id(field_id)
@@ -243,7 +243,7 @@ module IssuesHelper
         end
       end
       strings << show_detail(detail, no_html, options)
-      end
+
     end
     values_by_field.each do |field_id, changes|
       detail = JournalDetail.new(:property => 'cf', :prop_key => field_id)

app/models/issue.rb

@@ -51,7 +51,7 @@ class Issue < ActiveRecord::Base
 
 
   acts_as_nested_set :scope => 'root_id', :dependent => :destroy
-  acts_as_attachable :after_add => :attachment_added, :after_remove => :attachment_removed
+  acts_as_attachable :before_add => :attachment_added, :after_remove => :attachment_removed
   acts_as_customizable
   acts_as_watchable
   acts_as_searchable :columns => ['subject', "#{table_name}.description", "#{Journal.table_name}.notes"],
@@ -1359,7 +1359,7 @@ class Issue < ActiveRecord::Base
 
   # Callback on file attachment
   def attachment_added(obj)
-    if @current_journal && !obj.new_record? && @current_journal.journalized_id == obj.author_id
+    if @current_journal && @current_journal.user_id == obj.author_id && JournalDetail.find_all_by_value(obj.filename).count == 0
       @current_journal.details << JournalDetail.new(:property => 'attachment', :prop_key => obj.id, :value => obj.filename)
     end
   end