Question

当我提交到数据库时，我收到一个IntegrityError。我正在尝试在start_time和end_time字段中提交时间，例如：%H:%M:%S，因为HTML表单提示。 start_time = db.Column(db.DateTime, nullable=True)字段可能不正确吗？

跟踪

IntegrityError

sqlalchemy.exc.IntegrityError：（sqlite3.IntegrityError）非空约束失败：drivers.start_time [SQL：INSERT INTO驱动程序（名称， start_time，end_time）VALUES（？，？，？）] [参数：（'Bob'，None，无）]

Models.py

    from .extensions import db
    from datetime import datetime

    class Drivers(db.Model):
        id = db.Column(db.Integer, primary_key=True)
        name = db.Column(db.String(500))
        start_time = db.Column(db.DateTime, nullable=True)
        end_time = db.Column(db.DateTime, nullable=True)
        miles = db.Column(db.Integer, primary_key=True)

        def __init__(self, **kwargs):
            super().__init__(**kwargs)

        def calc_driver(self):
            FMT = '%H:%M:%S'
            total_time = datetime.strftime(start_time, FMT) - datetime.strftime(end_time, FTM)
            distance = total_time * miles 
            return distance

如何修复“ sqlalchemy.exc.IntegrityError：”？

0 个答案: