feat: support PostgreSQL now

model/main.go

@@ -2,10 +2,12 @@ package model
 
 import (
 	"gorm.io/driver/mysql"
+	"gorm.io/driver/postgres"
 	"gorm.io/driver/sqlite"
 	"gorm.io/gorm"
 	"one-api/common"
 	"os"
+	"strings"
 	"time"
 )
 
@@ -34,28 +36,35 @@ func createRootAccountIfNeed() error {
 	return nil
 }
 
-func CountTable(tableName string) (num int64) {
-	DB.Table(tableName).Count(&num)
-	return
-}
-
-func InitDB() (err error) {
-	var db *gorm.DB
+func chooseDB() (*gorm.DB, error) {
 	if os.Getenv("SQL_DSN") != "" {
+		dsn := os.Getenv("SQL_DSN")
+		if strings.HasPrefix(dsn, "postgres://") {
+			// Use PostgreSQL
+			common.SysLog("using PostgreSQL as database")
+			return gorm.Open(postgres.New(postgres.Config{
+				DSN:                  dsn,
+				PreferSimpleProtocol: true, // disables implicit prepared statement usage
+			}), &gorm.Config{
+				PrepareStmt: true, // precompile SQL
+			})
+		}
 		// Use MySQL
 		common.SysLog("using MySQL as database")
-		db, err = gorm.Open(mysql.Open(os.Getenv("SQL_DSN")), &gorm.Config{
-			PrepareStmt: true, // precompile SQL
-		})
-	} else {
-		// Use SQLite
-		common.SysLog("SQL_DSN not set, using SQLite as database")
-		common.UsingSQLite = true
-		db, err = gorm.Open(sqlite.Open(common.SQLitePath), &gorm.Config{
+		return gorm.Open(mysql.Open(dsn), &gorm.Config{
 			PrepareStmt: true, // precompile SQL
 		})
 	}
-	common.SysLog("database connected")
+	// Use SQLite
+	common.SysLog("SQL_DSN not set, using SQLite as database")
+	common.UsingSQLite = true
+	return gorm.Open(sqlite.Open(common.SQLitePath), &gorm.Config{
+		PrepareStmt: true, // precompile SQL
+	})
+}
+
+func InitDB() (err error) {
+	db, err := chooseDB()
 	if err == nil {
 		if common.DebugEnabled {
 			db = db.Debug()