Init Commit: After finish database connection.

config/db.go

@@ -0,0 +1,36 @@
+package config
+
+import (
+	"GinWithGormTutorial/global"
+	"fmt"
+	"log"
+	"time"
+
+	"gorm.io/driver/mysql"
+	"gorm.io/gorm"
+)
+
+func buildDSN(user, password, host, port, db, charset string) string {
+	template := "%s:%s@tcp(%s:%s)/%s?charset=%s"
+	return fmt.Sprintf(template, user, password, host, port, db, charset)
+}
+
+func initDB() {
+	dsn := buildDSN(AppConfig.Database.User, AppConfig.Database.Password, AppConfig.Database.Host, AppConfig.Database.Port, AppConfig.Database.Name, AppConfig.Database.Charset)
+	db, err := gorm.Open(mysql.Open(dsn), &gorm.Config{})
+
+	if err != nil {
+		log.Fatalf("Failed to connect to database,%v", err)
+	}
+
+	sqlDB, err := db.DB()
+	sqlDB.SetMaxIdleConns(10)
+	sqlDB.SetMaxOpenConns(100)
+	sqlDB.SetConnMaxLifetime(10 * time.Second)
+
+	if err != nil {
+		log.Fatalf("Failed to configure to database,%v", err)
+	}
+
+	global.Db = db
+}