diff --git a/g/database/gdb/gdb_func.go b/g/database/gdb/gdb_func.go
index 63a11f846..e7e8b8181 100644
--- a/g/database/gdb/gdb_func.go
+++ b/g/database/gdb/gdb_func.go
@@ -20,6 +20,11 @@ import (
 	"time"
 )
 
+// Type assert api for String().
+type apiString interface {
+	String() string
+}
+
 // 格式化SQL查询条件
 func formatCondition(where interface{}, args []interface{}) (newWhere string, newArgs []interface{}) {
     // 条件字符串处理
@@ -187,3 +192,32 @@ func getInsertOperationByOption(option int) string {
     }
     return operator
 }
+
+// 将对象转换为map，如果对象带有继承对象，那么执行递归转换。
+// 该方法用于将变量传递给数据库执行之前。
+func structToMap(obj interface{}) map[string]interface{} {
+	data := gconv.Map(obj)
+	for k, v := range data {
+		rv   := reflect.ValueOf(v)
+		kind := rv.Kind()
+		if kind == reflect.Ptr {
+			rv   = rv.Elem()
+			kind = rv.Kind()
+		}
+		switch kind {
+			case reflect.Struct:
+				// 底层数据库引擎支持 time.Time 类型
+				if _, ok := v.(time.Time); ok {
+					continue
+				}
+				// 如果执行String方法，那么执行字符串转换
+				if s, ok := v.(apiString); ok {
+					data[k] = s.String()
+				}
+				for k, v := range structToMap(v) {
+					data[k] = v
+				}
+		}
+	}
+	return data
+}
\ No newline at end of file
diff --git a/g/util/gconv/gconv_map.go b/g/util/gconv/gconv_map.go
index 94f6f72e9..6da49ee48 100644
--- a/g/util/gconv/gconv_map.go
+++ b/g/util/gconv/gconv_map.go
@@ -13,6 +13,9 @@ import (
     "strings"
 )
 
+const (
+	gGCONV_TAG = "gconv"
+)
 // Map converts any variable <i> to map[string]interface{}.
 // If the parameter <i> is not a map type, then the conversion will fail and returns nil.
 // If <i> is a struct object, the second parameter <tags> specifies the most priority
@@ -102,8 +105,7 @@ func Map(value interface{}, tags...string) map[string]interface{} {
                     case reflect.Struct:
                         rt       := rv.Type()
                         name     := ""
-                        gconvTag := "gconv"
-                        tagArray := []string{gconvTag, "json"}
+                        tagArray := []string{gGCONV_TAG, "json"}
 	                    switch len(tags) {
 		                    case 0:
 		                    	// No need handle.
@@ -112,8 +114,8 @@ func Map(value interface{}, tags...string) map[string]interface{} {
 		                    default:
 			                    tagArray = tags
 	                    }
-                        if gstr.SearchArray(tagArray, gconvTag) < 0 {
-	                        tagArray = append(tagArray, gconvTag)
+                        if gstr.SearchArray(tagArray, gGCONV_TAG) < 0 {
+	                        tagArray = append(tagArray, gGCONV_TAG)
                         }
                         for i := 0; i < rv.NumField(); i++ {
                             // Only convert the public attributes.