Add created and changed fields to playlists responses

db/migration/20200411164603_add_created_and_updated_fields_to_playlists.go

@@ -0,0 +1,26 @@
+package migration
+
+import (
+	"database/sql"
+	"github.com/pressly/goose"
+)
+
+func init() {
+	goose.AddMigration(Up20200411164603, Down20200411164603)
+}
+
+func Up20200411164603(tx *sql.Tx) error {
+	_, err := tx.Exec(`
+alter table playlist
+	add created_at datetime;
+alter table playlist
+	add updated_at datetime;
+update playlist 
+	set created_at = datetime('now'), updated_at = datetime('now');
+`)
+	return err
+}
+
+func Down20200411164603(tx *sql.Tx) error {
+	return nil
+}