fix

tool/define/diff.go

@@ -136,21 +136,21 @@ func DefaultDiffFunc(field string, inputVal wrapper.Map, storageVal wrapper.Map,
 	}
 	var (
 		inputFieldVal        any
-		inputFieldValExist   bool
+		inputFieldValExist   error
 		storageFieldVal      any
-		storageFieldValExist bool
+		storageFieldValExist error
 	)
 
 	inputFieldVal, inputFieldValExist = inputVal.Get(field)
 	storageFieldVal, storageFieldValExist = storageVal.Get(field)
 	// 字段在输入数据和存储数据中均不存在
-	if !inputFieldValExist && !storageFieldValExist {
+	if nil != inputFieldValExist && nil != storageFieldValExist {
 		// 输入和存储都没这个字段
 		return result
 	}
 
 	// 判断输入字段是否存在
-	if !inputFieldValExist {
+	if nil != inputFieldValExist {
 		if option.IgnoreNotFoundField {
 			// 忽略不存在的字段
 			return result
@@ -162,7 +162,7 @@ func DefaultDiffFunc(field string, inputVal wrapper.Map, storageVal wrapper.Map,
 		return result
 	}
 	// 判断存储字段是否存在
-	if !storageFieldValExist {
+	if nil != storageFieldValExist {
 		result.IsSame = false
 		result.DiffReason = DiffReasonStorageFieldNotFound
 		result.NewVal = inputFieldVal