feat: PostgreSQL as the panel's database, chosen in Настройки, the SQLite data copied over on its first start; tested on a real PostgreSQL

internal/server/dbpg.go

@@ -167,16 +167,22 @@ func copyDB(src, dst *DB) error {
 			return err
 		}
 	}
+	if err := tx.Commit(); err != nil {
+		return err
+	}
+	// The id counters past the copied ids, where a table has one.
 	for _, t := range copyTables {
 		var seq sql.NullString
-		_ = tx.QueryRow(`SELECT pg_get_serial_sequence($1, 'id')`, t).Scan(&seq)
-		if seq.Valid {
-			if _, err := tx.Exec(`SELECT setval($1, COALESCE((SELECT MAX(id) FROM `+t+`), 0) + 1, false)`, seq.String); err != nil {
-				return err
-			}
+		err := dst.sql.DB.QueryRow(`SELECT pg_get_serial_sequence($1, column_name) FROM information_schema.columns
+			WHERE table_name = $1 AND column_name = 'id' AND column_default LIKE 'nextval%'`, t).Scan(&seq)
+		if err != nil || !seq.Valid {
+			continue
+		}
+		if _, err := dst.sql.DB.Exec(`SELECT setval($1, COALESCE((SELECT MAX(id) FROM `+t+`), 0) + 1, false)`, seq.String); err != nil {
+			return err
 		}
 	}
-	return tx.Commit()
+	return nil
 }
 
 // Backend tells which database is in use and which is chosen for the next