nil默认

util/IfUtil.go

@@ -8,5 +8,8 @@ func If[K any](isTrue bool, a, b K) K {
 }
 
 func IfNull[K any](a *K, defaultValue K) K {
-	return If(a == nil, defaultValue, *a)
+	if a == nil {
+		return defaultValue
+	}
+	return *a
 }

util/StringUtil_test.go

@@ -11,10 +11,15 @@ func TestContainsForSplitComma(t *testing.T) {
 	fmt.Printf("%s是否包含在[%s]中：%v", a, b, ContainsForSplitComma(b, a))
 }
 
+type DefaultCount struct {
+	Count *int32   `gorm:"column:count" json:"count"` // 笔数
+	Money *float64 `gorm:"column:money" json:"money"` // 金额（元）
+}
+
 func TestStrval(t *testing.T) {
 	fmt.Printf("转换内容：%s", GetInterfaceToString(3.10))
-	var a int
-	a = If(true, 12, 0)
-	a = IfNull(&a, 0)
+	var count DefaultCount
+	//a := If(count.Count == nil, 12, 0)
+	a := IfNull(count.Count, 0)
 	fmt.Printf("结果：%d", a)
 }