- 优化dao.GenQuestionMarks

business/model/dao/dao_utils.go

@@ -73,12 +73,18 @@ func WrapUpdateULEntity(item interface{}, lastOperator string) interface{} {
 	return item
 }
 
-func GenQuestionMarks(count int) string {
+func GenQuestionMarks(count int) (marks string) {
-	marks := ""
 	if count > 0 {
+		if count == 1 {
 			marks = "?"
+		} else {
+			builder := &strings.Builder{}
+			builder.Grow(1 + (count-1)*3)
+			builder.WriteString("?")
 			for i := 1; i < count; i++ {
-			marks += ", ?"
+				builder.WriteString(", ?")
+			}
+			marks = builder.String()
 		}
 	}
 	return marks