optomization in getting game system

backend/gsmaster/game_system.go

@@ -0,0 +1,20 @@
+package gsmaster
+
+import "bamort/models"
+
+func GetGameSystem(id int, name string) *models.GameSystem {
+	gs := &models.GameSystem{}
+	if id == 0 && name == "" {
+		gs.GetDefault()
+		return gs
+	}
+	if id == 0 && name != "" {
+		gs.FirstByCode(name)
+		if gs.ID == 0 {
+			gs.FirstByName(name)
+		}
+		return gs
+	}
+	gs.FirstByID(uint(id))
+	return gs
+}