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-rw-r--r--lib/rails4_migration_version.rb16
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diff --git a/lib/rails4_migration_version.rb b/lib/rails4_migration_version.rb
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+++ b/lib/rails4_migration_version.rb
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+# rubocop:disable Naming/FileName
+# frozen_string_literal: true
+
+# When switching to rails 5, we added migration version to all migration
+# classes. This patch makes it possible to run versioned migrations
+# also with rails 4
+
+unless Gitlab.rails5?
+ module ActiveRecord
+ class Migration
+ def self.[](version)
+ Migration
+ end
+ end
+ end
+end