From 79f39c5bb52bc338f563df7fc9198ba14c3e6b1b Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E8=80=97=E5=AD=90?= <haozi@loli.email>
Date: Fri, 6 Feb 2026 20:59:08 +0800
Subject: [PATCH 1/2] =?UTF-8?q?fix:=20=E9=80=9A=E9=85=8D=E7=AC=A6=E8=A7=84?=
 =?UTF-8?q?=E5=88=99=E9=AA=8C=E8=AF=81=20JSON=20=E5=8F=8D=E5=BA=8F?=
 =?UTF-8?q?=E5=88=97=E5=8C=96=E7=9A=84=20slice=20=E6=97=B6=E8=AF=AF?=
 =?UTF-8?q?=E5=88=A4=E5=A4=B1=E8=B4=A5?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 issues_test.go | 35 +++++++++++++++++++++++++++++++++++
 validating.go  |  8 ++++----
 2 files changed, 39 insertions(+), 4 deletions(-)

diff --git a/issues_test.go b/issues_test.go
index bd867f9..8a8b917 100644
--- a/issues_test.go
+++ b/issues_test.go
@@ -1915,3 +1915,38 @@ func TestIssue_302(t *testing.T) {
 	assert.True(t, v.Validate())
 	assert.Empty(t, v.Errors.One())
 }
+
+func TestIssue_328(t *testing.T) {
+	type Test struct {
+		Domains []string `form:"domains" json:"domains" validate:"required|isSlice"`
+		Index   []string `form:"index" json:"index" validate:"required|isSlice"`
+	}
+
+	t.Run("success", func(t *testing.T) {
+		df, err := validate.FromStruct(&Test{
+			Domains: []string{"example.com", "test.com", "a.com"},
+			Index:   []string{"index.php"},
+		})
+		assert.NoError(t, err)
+		v := df.Create()
+		v.StringRule("Domains.*", "required")
+		v.StringRule("Index.*", "required")
+
+		assert.True(t, v.Validate())
+	})
+
+	t.Run("error", func(t *testing.T) {
+		data := `{"domains":["example.com","test.com","a.com"],"index":["index.php"]}`
+		req := new(Test)
+		err := jsonutil.DecodeString(data, req)
+		assert.NoError(t, err)
+
+		df, err := validate.FromStruct(req)
+		assert.NoError(t, err)
+		v := df.Create()
+		v.StringRule("Domains.*", "required")
+		v.StringRule("Index.*", "required")
+
+		assert.True(t, v.Validate())
+	})
+}
diff --git a/validating.go b/validating.go
index c3257d7..622d1d5 100644
--- a/validating.go
+++ b/validating.go
@@ -299,17 +299,17 @@ func (r *Rule) valueValidate(field, name string, val any, v *Validation) (ok boo
 	valKind := rftVal.Kind()
 
 	if valKind == reflect.Slice && dotStarNum > 0 {
-		sliceLen, sliceCap := rftVal.Len(), rftVal.Cap()
+		sliceLen := rftVal.Len()
 
 		// if dotStarNum > 1, need flatten multi level slice with depth=dotStarNum.
 		if dotStarNum > 1 {
 			rftVal = flatSlice(rftVal, dotStarNum-1)
-			sliceLen, sliceCap = rftVal.Len(), rftVal.Cap()
+			sliceLen = rftVal.Len()
 		}
 
 		// check requiredXX validate - flatten multi level slice, count ".*" number.
-		// TIP: if len < cap: not enough elements in the slice. use empty val call validator.
-		if !r.nameNotRequired && sliceLen < sliceCap {
+		// TIP: if len == 0: no elements in the slice. use empty val call validator.
+		if !r.nameNotRequired && sliceLen == 0 {
 			return callValidator(v, fm, field, nil, r.arguments, addNum)
 		}
 

From 26dfc60977ce5715f0375bcfb9a0991ba1b38061 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E8=80=97=E5=AD=90?= <haozi@loli.email>
Date: Fri, 6 Feb 2026 21:02:45 +0800
Subject: [PATCH 2/2] fix: lint

---
 issues_test.go | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/issues_test.go b/issues_test.go
index 8a8b917..4eebb75 100644
--- a/issues_test.go
+++ b/issues_test.go
@@ -1922,7 +1922,7 @@ func TestIssue_328(t *testing.T) {
 		Index   []string `form:"index" json:"index" validate:"required|isSlice"`
 	}
 
-	t.Run("success", func(t *testing.T) {
+	t.Run("success_with_struct", func(t *testing.T) {
 		df, err := validate.FromStruct(&Test{
 			Domains: []string{"example.com", "test.com", "a.com"},
 			Index:   []string{"index.php"},
@@ -1935,7 +1935,7 @@ func TestIssue_328(t *testing.T) {
 		assert.True(t, v.Validate())
 	})
 
-	t.Run("error", func(t *testing.T) {
+	t.Run("success_with_json", func(t *testing.T) {
 		data := `{"domains":["example.com","test.com","a.com"],"index":["index.php"]}`
 		req := new(Test)
 		err := jsonutil.DecodeString(data, req)