抽离配置到nacos里

pkg/mysql/mysql.go

@@ -7,6 +7,7 @@ import (
 	"gorm.io/gorm"
 	"gorm.io/gorm/schema"
 	"gorm.io/plugin/dbresolver"
+	"pkg.local/utils"
 )
 
 type Config struct {
@@ -59,28 +60,28 @@ func New(c Config) (*gorm.DB, error) {
 }
 
 func buildReadDSN(c Config) string {
-	if c.ReadHost == "" {
-		return ""
+	if c.ReadHost == utils.StringEmpty {
+		return utils.StringEmpty
 	}
 
 	port := c.ReadPort
-	if port == 0 {
+	if port == utils.NumberZero {
 		port = c.Port
 	}
 	user := c.ReadUser
-	if user == "" {
+	if user == utils.StringEmpty {
 		user = c.User
 	}
 	password := c.ReadPassword
-	if password == "" {
+	if password == utils.StringEmpty {
 		password = c.Password
 	}
 	database := c.ReadDatabase
-	if database == "" {
+	if database == utils.StringEmpty {
 		database = c.Database
 	}
 	charset := c.Charset
-	if charset == "" {
+	if charset == utils.StringEmpty {
 		charset = "utf8mb4"
 	}
 	return buildDSN(user, password, c.ReadHost, port, database, charset)