Makes spent time column available on the issue list (#971).

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@8073 e93f8b46-1217-0410-a6f0-8f06a7374b81

app/models/issue.rb

@@ -499,13 +499,18 @@ class Issue < ActiveRecord::Base
     notified.collect(&:mail)
   end
 
+  # Returns the number of hours spent on this issue
+  def spent_hours
+    @spent_hours ||= time_entries.sum(:hours) || 0
+  end
+
   # Returns the total number of hours spent on this issue and its descendants
   #
   # Example:
   #   spent_hours => 0.0
   #   spent_hours => 50.2
-  def spent_hours
-    @spent_hours ||= self_and_descendants.sum("#{TimeEntry.table_name}.hours", :include => :time_entries).to_f || 0.0
+  def total_spent_hours
+    @total_spent_hours ||= self_and_descendants.sum("#{TimeEntry.table_name}.hours", :include => :time_entries).to_f || 0.0
   end
 
   def relations
@@ -522,6 +527,16 @@ class Issue < ActiveRecord::Base
     end
   end
 
+  # Preloads visible spent time for a collection of issues
+  def self.load_visible_spent_hours(issues, user=User.current)
+    if issues.any?
+      hours_by_issue_id = TimeEntry.visible(user).sum(:hours, :group => :issue_id)
+      issues.each do |issue|
+        issue.instance_variable_set "@spent_hours", (hours_by_issue_id[issue.id] || 0)
+      end
+    end
+  end
+
   # Finds an issue relation given its id.
   def find_relation(relation_id)
     IssueRelation.find(relation_id, :conditions => ["issue_to_id = ? OR issue_from_id = ?", id, id])