FastAPI 中的 response_model 驗證錯誤

Question

我在 fastapi 中的 response_model 有一個錯誤

我，我正在學習 FastApi 並且我有這個模式：

class BasicArticle(BaseModel):
    title: str
    content: str
    published: bool

class ArticleBase(BasicArticle):
    creator_id: int

class UserInArticle(BaseModel):
    id: int
    username: str

    class Config:
        orm_mode: True

class ArticleDisplay(BasicArticle):
    user: UserInArticle

    class Config:
        orm_mode = True

這些是我的模型：

class DbUser(Base):
    __tablename__ = "users"
    id = Column(Integer, primary_key=True, index=True)
    username = Column(String)
    email = Column(String)
    password = Column(String)
    items = relationship("DbArticle", back_populates="user")  

class DbArticle(Base):
    __tablename__ = "articles"
    id = Column(Integer, primary_key=True, index=True)
    title = Column(String)
    content = Column(String)
    published = Column(Boolean)
    user_id = Column(Integer, ForeignKey('users.id'))
    user = relationship("DbUser", back_populates="items")

我在這里創建帖子：

def create_article(db: Session, request: ArticleBase):
    new_article = DbArticle(
        title=request.title,
        content=request.content,
        published=request.published,
        user_id=request.creator_id
    )
    db.add(new_article)
    db.commit()
    db.refresh(new_article)

    return new_article

最后，這是終點：

@router.post('/', response_model=ArticleDisplay, status_code=status.HTTP_201_CREATED)
def create_article(request: ArticleBase, db: Session = Depends(get_db)):
    return db_article.create_article(db, request)

問題是：

pydantic.error_wrappers.ValidationError: 1 validation error for ArticleDisplay
response -> user
  value is not a valid dict (type=type_error.dict)

類配置：orm_mode = True

應該為此工作，至少在我正在學習的課程中是這樣，但我不知道自課程創建以來 pydantic 是否發生了變化。

我感謝每一個答案

Answer 1

無法生成錯誤，但建議根據您的 python 版本遵循以下簡單的 crud。

https://github.com/tiangolo/fastapi/tree/master/docs_src/sql_databases/sql_app

參考： https ://fastapi.tiangolo.com/tutorial/sql-databases/#__tabbed_4_2

Answer 2

您的UserInArticle模型中似乎有錯字：

class UserInArticle(BaseModel):
    id: int
    username: str

    class Config:
        orm_mode: True  # Should be "= True" and not ": True"