Remove Duplicated keys add UNIQUE index to fingerprint18697-uniqueness-key-validation

1 files changed, 21 insertions, 0 deletions

diff --git a/db/migrate/20160616103005_remove_keys_fingerprint_index_if_exists.rb b/db/migrate/20160616103005_remove_keys_fingerprint_index_if_exists.rb
new file mode 100644
index 00000000000..4bb4204cebd
--- /dev/null
+++ b/db/migrate/20160616103005_remove_keys_fingerprint_index_if_exists.rb
@@ -0,0 +1,21 @@
+class RemoveKeysFingerprintIndexIfExists < ActiveRecord::Migration
+  include Gitlab::Database::MigrationHelpers
+
+  disable_ddl_transaction!
+
+  # https://gitlab.com/gitlab-org/gitlab-ee/merge_requests/250
+  # That MR was added on gitlab-ee so we need to check if the index
+  # already exists because we want to do is create an unique index instead.
+
+  def up
+    if index_exists?(:keys, :fingerprint)
+      remove_index :keys, :fingerprint
+    end
+  end
+
+  def down
+    unless index_exists?(:keys, :fingerprint)
+      add_concurrent_index :keys, :fingerprint
+    end
+  end
+end