fix(module: form): cause exception while has no FieldIdentifier (#3717)

* fix(module: form): cause exception while has no FieldIdentifier

* clean

components/core/Base/AntInputComponentBase.cs

@@ -143,7 +143,8 @@ namespace AntDesign
 
                     OnCurrentValueChange(value);
 
-                    if (_isNotifyFieldChanged && (Form?.ValidateOnChange == true))
+                    if (_isNotifyFieldChanged && Form?.ValidateOnChange == true
+                        && FieldIdentifier is { Model: not null, FieldName: not null })
                     {
                         EditContext?.NotifyFieldChanged(FieldIdentifier);
                     }

tests/AntDesign.Tests/Form/Validation/Form.ValidationTests.razor

@@ -0,0 +1,28 @@
+@inherits AntDesignTestBase
+
+@code {
+    class Model
+    {
+        public string Name { get; set; } = "";
+
+        public string? RequiredField { get; set; }
+    }
+    Model _model = new();
+
+
+    [Fact]
+    public void Form_regression_test()
+    {
+        Model _model = new();
+
+        //Arrange
+        bool handlerExecuted = false;
+        Action<bool> onChangeHandler = value => { handlerExecuted = true; };
+        var cut = Render(@<Form Model="@_model" ValidateOnChange="true"><Switch OnChange="onChangeHandler" /></Form>);
+        var buttonElement = cut.Find("button");
+        //Act
+        buttonElement.Click();
+        //Assert
+        Assert.True(handlerExecuted);
+    }
+}