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-rw-r--r--config/initializers/0_post_deployment_migrations.rb15
1 files changed, 15 insertions, 0 deletions
diff --git a/config/initializers/0_post_deployment_migrations.rb b/config/initializers/0_post_deployment_migrations.rb
new file mode 100644
index 000000000..61121ccd7
--- /dev/null
+++ b/config/initializers/0_post_deployment_migrations.rb
@@ -0,0 +1,15 @@
+# Post deployment migrations are included by default. This file must be loaded
+# before other initializers as Rails may otherwise memoize a list of migrations
+# excluding the post deployment migrations.
+
+unless ENV['SKIP_POST_DEPLOYMENT_MIGRATIONS']
+  Rails.application.config.paths['db'].each do |db_path|
+    path = Rails.root.join(db_path, 'post_migrate').to_s
+
+    Rails.application.config.paths['db/migrate'] << path
+
+    # Rails memoizes migrations at certain points where it won't read the above
+    # path just yet. As such we must also update the following list of paths.
+    ActiveRecord::Migrator.migrations_paths << path
+  end
+end