fix bug and add mysql driver

util/db_utils.go

@@ -0,0 +1,46 @@
+/*
+ * Copyright (C) 2022. Gardel <sunxinao@hotmail.com> and contributors
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package util
+
+import (
+	"gorm.io/gorm"
+	"log"
+	"strings"
+	"yggdrasil-go/util/dialector"
+)
+
+type DbCfg struct {
+	DatabaseDriver string `ini:"database_driver"`
+	DatabaseDsn    string `ini:"database_dsn"`
+}
+
+func GetDialector(cfg DbCfg) gorm.Dialector {
+	if driver, ok := dialector.DbDriverDialectors[cfg.DatabaseDriver]; ok {
+		return driver(cfg.DatabaseDsn)
+	} else {
+		keys := make([]string, len(dialector.DbDriverDialectors))
+		p := 0
+		for k := range dialector.DbDriverDialectors {
+			keys[p] = k
+			p++
+		}
+		supported := strings.Join(keys, ",")
+		log.Panicf("Unknown driver: %s\nSupported: %s\n", cfg.DatabaseDriver, supported)
+		return nil
+	}
+}