Redmine 3.4.4

db/migrate/20150525103953_clear_estimated_hours_on_parent_issues.rb

@@ -0,0 +1,15 @@
+class ClearEstimatedHoursOnParentIssues < ActiveRecord::Migration
+  def self.up
+    # Clears estimated hours on parent issues
+    Issue.where("rgt > lft + 1 AND estimated_hours > 0").update_all :estimated_hours => nil
+  end
+
+  def self.down
+    table_name = Issue.table_name
+    leaves_sum_select = "SELECT SUM(leaves.estimated_hours) FROM (SELECT * FROM #{table_name}) AS leaves" +
+      " WHERE leaves.root_id = #{table_name}.root_id AND leaves.lft > #{table_name}.lft AND leaves.rgt < #{table_name}.rgt" +
+      " AND leaves.rgt = leaves.lft + 1"
+
+    Issue.where("rgt > lft + 1").update_all "estimated_hours = (#{leaves_sum_select})"
+  end
+end