feat: sending and receiving messages with files, editing text messages

models/chat.py

@@ -109,6 +109,23 @@ class Chat(BaseModel):
     )
 
 
+class MessageFile(BaseModel):
+    __tablename__ = 'message_files'
+
+    id: Mapped[int] = mapped_column(primary_key=True)
+    file_path: Mapped[str] = mapped_column(nullable=False)
+    type: Mapped[Optional[str]] = mapped_column(nullable=True)
+    file_name: Mapped[str] = mapped_column(nullable=False)
+    file_size: Mapped[int] = mapped_column(BigInteger(), nullable=True, comment='Размер файла в байтах')
+
+    message_id: Mapped[int] = mapped_column(ForeignKey('messages.id'))
+    message: Mapped['Message'] = relationship(
+        'Message',
+        lazy='noload',
+        back_populates='file',
+    )
+
+
 class MessageStatus(enum.Enum):
     sending = 'SENDING'
     success = 'SUCCESS'
@@ -125,6 +142,7 @@ class Message(BaseModel):
     created_at: Mapped[datetime] = mapped_column(nullable=False)
     status: Mapped[MessageStatus] = mapped_column(Enum(MessageStatus), nullable=False)
     is_deleted: Mapped[bool] = mapped_column(default=False, server_default='0', nullable=False)
+    is_edited: Mapped[bool] = mapped_column(default=False, server_default='0', nullable=False)
 
     tg_sender_id: Mapped[Optional[int]] = mapped_column(
         ForeignKey('tg_users.id'),
@@ -152,3 +170,9 @@ class Message(BaseModel):
         lazy='noload',
         back_populates='messages',
     )
+
+    file: Mapped[Optional[MessageFile]] = relationship(
+        'MessageFile',
+        back_populates='message',
+        lazy='selectin',
+    )