diff --git a/db/migrate/20121003223358_extract_backtraces.rb b/db/migrate/20121003223358_extract_backtraces.rb
new file mode 100644
index 0000000..06fadf2
--- /dev/null
+++ b/db/migrate/20121003223358_extract_backtraces.rb
@@ -0,0 +1,13 @@
+class ExtractBacktraces < Mongoid::Migration
+  def self.up
+    Notice.unscoped.all.each do |notice|
+      backtrace = Backtrace.find_or_create(:raw => notice['backtrace'])
+      notice.backtrace = backtrace
+      notice['backtrace'] = nil
+      notice.save!
+    end
+  end
+
+  def self.down
+  end
+end
--
libgit2 0.21.2