from pydantic import BaseModel, Field class CreateUploadTokenRequest(BaseModel): biz_type: str biz_id: int = Field(gt=0) file_name: str file_type: str file_size: int = Field(gt=0) class SaveAttachmentRequest(BaseModel): biz_type: str biz_id: int = Field(gt=0) file_name: str file_url: str file_type: str file_size: int = Field(gt=0)