Fix after test failure

validation/validation.go

@@ -245,9 +245,14 @@ func (v *Validation) ZipCode(obj interface{}, key string) *Result {
 }
 
 func (v *Validation) apply(chk Validator, obj interface{}) *Result {
-	if reflect.TypeOf(obj).Kind() == reflect.Ptr {
+	validatorName := reflect.TypeOf(chk).Name()
+	if nil == obj {
+		if chk.IsSatisfied(obj) {
+			return &Result{Ok: true}
+		}
+	} else if reflect.TypeOf(obj).Kind() == reflect.Ptr {
 		if reflect.ValueOf(obj).IsNil() {
-			if "Required" != chk.GetKey() {
+			if "Required" != validatorName {
 				return &Result{Ok: true}
 			}
 		} else {

validation/validation_test.go

@@ -442,3 +442,56 @@ func TestSkipValid(t *testing.T) {
 		t.Fatal("validation should be passed")
 	}
 }
+
+func TestPointer(t *testing.T) {
+	type User struct {
+		ID int
+
+		Email    *string `valid:"Email"`
+		ReqEmail *string `valid:"Required;Email"`
+	}
+
+	u := User{
+		ReqEmail: nil,
+		Email:	  nil,
+	}
+
+	valid := Validation{}
+	b, err := valid.Valid(u)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if b {
+		t.Fatal("validation should not be passed")
+	}
+
+	validEmail := "a@a.com"
+	u = User{
+		ReqEmail: &validEmail,
+		Email:	  nil,
+	}
+
+	valid = Validation{RequiredFirst: true}
+	b, err = valid.Valid(u)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if !b {
+		t.Fatal("validation should be passed")
+	}
+
+	invalidEmail := "a@a"
+	u = User{
+		ReqEmail: &validEmail,
+		Email:	  &invalidEmail,
+	}
+
+	valid = Validation{}
+	b, err = valid.Valid(u)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if b {
+		t.Fatal("validation should not be passed")
+	}
+}