尝试使用 FastAPI/SQLite POST 时获取 (sqlite3.IntegrityError) NOT NULL 约束失败

Question

我收到以下错误

sqlalchemy.exc.IntegrityError: (sqlite3.IntegrityError) NOT NULL constraint failed: SignalJourneyAudienceConstraints.constraintId
[SQL: INSERT INTO "SignalJourneyAudienceConstraints" ("sourceId", "constraintTypeId", "constraintValue", targeting, frequency, period) VALUES (?, ?, ?, ?, ?, ?)]
[parameters: (None, 10, 'STRING', 1, None, None)]

尝试使用以下端点时。我已经制作了所有字段，除了：

constraintTypeId: int
约束值：str
定位：bool

暂时作为可选。

端点

# mail.py

...

@app.post("/add-new-audience-constraint", status_code=status.HTTP_200_OK)
def add_new_audience_constraint(
    sjac: schema.SignalJourneyAudienceConstraints, db: Session = Depends(get_db)
):
    """Sets the main query data."""
    new_audience_constraint = models.SignalJourneyAudienceConstraints(
        constraintTypeId=sjac.constraintTypeId,
        constraintValue=sjac.constraintValue.upper(),
        targeting=True,
    )

    db.add(new_audience_constraint)
    db.commit()

    return {"message": "Data added successfully."}

型号

# models.py 

class SignalJourneyAudienceConstraints(Base):
    """Signal Journey Audience Constraints"""

    __tablename__ = "SignalJourneyAudienceConstraints"
    constraintId = Column(Integer, primary_key=True)
    audienceId = Column(
        Integer,
        ForeignKey("SignalJourneyAudiences.audienceId"),
        primary_key=True,
    )
    sourceId = Column(Integer, ForeignKey("SignalJourneySources.sourceId"))
    constraintTypeId = Column(
        Integer, ForeignKey("SignalJourneyConstraintType.constraintTypeId")
    )
    constraintValue = Column(String)
    targeting = Column(Boolean)
    frequency = Column(Integer)
    period = Column(Integer)

架构

# schema.py
class SignalJourneyAudienceConstraints(BaseModel):
    """SignalJourneyAudienceConstraints BaseModel."""

    constraintId: Optional[int]  # PK
    audienceId: Optional[int]  # FK - SignalJourneyAudiences -> audienceId
    sourceId: Optional[int]  # FK - SignalJourneySources -> sourceId
    constraintTypeId: int  # FK - SignalJourneyConstraintType -> constraintTypeId
    constraintValue: str
    targeting: bool
    frequency: Optional[int]
    period: Optional[int]

    class Config:
        """config class"""

        orm_mode = True

我已经研究了其他 SO 问题，但 none 似乎符合我的经历。希望有人能解释这是怎么回事以及如何解决它

ERD

Answer 1

您有两个字段列为 primary_key；它们都是主键吗？由于您有两个字段，因此主键字段不会自动定义为自动递增字段；为此，您只想拥有一个主键，整数字段。

SQLAlchemy 只会自动为 SQLite 设置 auto_increment 属性 when there is a single primary key column and it's defined as an integer。

由于定义复合键不是您想要的，使用 constraintId 作为单个自动递增键（如您的 ERD 中所示）是您想要的 - 删除 primary_key 条目audienceId 字段。

尝试使用 FastAPI/SQLite POST 时获取 (sqlite3.IntegrityError) NOT NULL 约束失败

Getting (sqlite3.IntegrityError) NOT NULL constraint failed when trying to POST using FastAPI/ SQLite

python

sqlite

sqlalchemy

fastapi

端点

型号

架构

ERD