diff options
| -rw-r--r-- | db/migrate/20130207175206_add_unique_index_on_custom_fields_trackers.rb | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/db/migrate/20130207175206_add_unique_index_on_custom_fields_trackers.rb b/db/migrate/20130207175206_add_unique_index_on_custom_fields_trackers.rb new file mode 100644 index 000000000..9977dcd50 --- /dev/null +++ b/db/migrate/20130207175206_add_unique_index_on_custom_fields_trackers.rb @@ -0,0 +1,24 @@ +class AddUniqueIndexOnCustomFieldsTrackers < ActiveRecord::Migration + def up + table_name = "#{CustomField.table_name_prefix}custom_fields_trackers#{CustomField.table_name_suffix}" + duplicates = CustomField.connection.select_rows("SELECT custom_field_id, tracker_id FROM #{table_name} GROUP BY custom_field_id, tracker_id HAVING COUNT(*) > 1") + duplicates.each do |custom_field_id, tracker_id| + # Removes duplicate rows + CustomField.connection.execute("DELETE FROM #{table_name} WHERE custom_field_id=#{custom_field_id} AND tracker_id=#{tracker_id}") + # And insert one + CustomField.connection.execute("INSERT INTO #{table_name} (custom_field_id, tracker_id) VALUES (#{custom_field_id}, #{tracker_id})") + end + + if index_exists? :custom_fields_trackers, [:custom_field_id, :tracker_id] + remove_index :custom_fields_trackers, [:custom_field_id, :tracker_id] + end + add_index :custom_fields_trackers, [:custom_field_id, :tracker_id], :unique => true + end + + def down + if index_exists? :custom_fields_trackers, [:custom_field_id, :tracker_id] + remove_index :custom_fields_trackers, [:custom_field_id, :tracker_id] + end + add_index :custom_fields_trackers, [:custom_field_id, :tracker_id] + end +end |