diff --git a/fieldx/schema_test.go b/fieldx/schema_test.go
index 151cfed..6c81641 100644
--- a/fieldx/schema_test.go
+++ b/fieldx/schema_test.go
@@ -426,12 +426,13 @@ func TestSchema_UnmarshalInStruct(t *testing.T) {
 	}
 }
 
-// TestSchema_Generate_FieldNotFound 测试字段不存在的情况
+// TestSchema_Generate_FieldNotFound 测试 Required 字段不存在时报错
 func TestSchema_Generate_FieldNotFound(t *testing.T) {
 	schema := Schema{
 		"name": Field{
-			Type:  FieldTypeField,
-			Value: "nonExistentField",
+			Type:     FieldTypeField,
+			Value:    "nonExistentField",
+			Required: true,
 		},
 	}
 
@@ -441,7 +442,35 @@ func TestSchema_Generate_FieldNotFound(t *testing.T) {
 
 	_, err := schema.Generate(source)
 	if err == nil {
-		t.Error("Generate() expected error for non-existent field, got nil")
+		t.Error("Generate() expected error for non-existent required field, got nil")
+	}
+}
+
+// TestSchema_Generate_OptionalFieldNotFound 测试非 Required 字段不存在时返回 nil 而不报错
+//
+// 这是 Required 的另一半语义(见 Field.Required 的文档): 只有 Required 为 true
+// 时字段缺失才算错误,否则取到 nil 继续。
+func TestSchema_Generate_OptionalFieldNotFound(t *testing.T) {
+	schema := Schema{
+		"name": Field{
+			Type:  FieldTypeField,
+			Value: "nonExistentField",
+			// Required 默认为 false
+		},
+	}
+
+	source := map[string]any{
+		"otherField": "value",
+	}
+
+	result, err := schema.Generate(source)
+	if err != nil {
+		t.Fatalf("Generate() 非必需字段缺失不应报错, 得到: %v", err)
+	}
+	if v, ok := result["name"]; !ok {
+		t.Error("Generate() 应该产出 name 键")
+	} else if v != nil {
+		t.Errorf("Generate() name = %v, 期望 nil", v)
 	}
 }