项目issue表数据迁移

db/migrate/20161111071624_update_fixed_version_id.rb

@@ -0,0 +1,8 @@
+class UpdateFixedVersionId < ActiveRecord::Migration
+  def up
+    Issue.find_by_sql("update `issues` set fixed_version_id = null where fixed_version_id = 0;")
+  end
+
+  def down
+  end
+end