fixed json serialization issue #1450

CHANGES/1450.bugfix.rst

@@ -0,0 +1 @@
+fixed json serialization for Message

aiogram/types/link_preview_options.py

@@ -1,5 +1,7 @@
 from typing import TYPE_CHECKING, Any, Optional, Union
 
+from pydantic import field_serializer
+
 from ..client.default import Default
 from .base import TelegramObject
 
@@ -22,6 +24,22 @@ class LinkPreviewOptions(TelegramObject):
     show_above_text: Optional[Union[bool, Default]] = Default("link_preview_show_above_text")
     """*Optional*. :code:`True`, if the link preview must be shown above the message text; otherwise, the link preview will be shown below the message text"""
 
+    @field_serializer("is_disabled", when_used="json")
+    def serialize_is_disabled(self, value):
+        return value.__str__()
+
+    @field_serializer("prefer_small_media", when_used="json")
+    def serialize_prefer_small_media(self, value):
+        return value.__str__()
+
+    @field_serializer("prefer_large_media", when_used="json")
+    def serialize_prefer_large_media(self, value):
+        return value.__str__()
+
+    @field_serializer("show_above_text", when_used="json")
+    def serialize_show_above_text(self, value):
+        return value.__str__()
+
     if TYPE_CHECKING:
         # DO NOT EDIT MANUALLY!!!
         # This section was auto-generated via `butcher`