Question

当我尝试向数据库添加数据时出现错误。我已经建立了数据库和它的应用程序

class User(db.Model):
    id = db.Column(db.Integer,primary_key=True)
    name = db.Column(db.String(120),nullable = False)
    email = db.Column(db.String(70),primary_key=True,nullable = False)
    post = db.Column(db.String(10000),default ="")
    date_created = db.Column(db.DateTime, default = datetime.utcnow)

    def __repr__(self):
        return f'{self.id},{self.name},{self.email},{self.post},{self.date_created}'

每当我尝试在下面的代码中创建数据库时，我都会遇到问题：

@app.route('/sign_up',methods = ["POST","GET"])
def sign_up():
    if request.method == 'POST':
        email = request.form.get('email')
        first_name = request.form.get('first_name')
        password_1 = request.form.get('password')
        password_2 = request.form.get('password-2')

        user = User.query.filter_by(email=email).first()

        if user:
            flash("Email aleady exists", category = 'error')
        elif len(email) < 5:
            flash("Email name must be greater than 5 characters", category='error')
        # We'll come back to you tomorrow (i.e 25th March)
        elif len(first_name) < 2:
            flash("First Name too short",category='error')
        elif password_1 != password_2:
            flash("Make sure you typed the password correctly",category='error')
        elif len(password_1) < 8:
            flash("Make sure your password as at least 8 characters", category='error')
        else:
            new_user = User(name= first_name,email = email)
            db.session.add(new_user)
            db.session.commit()
            flash("Account Created",category='success')
            return redirect(url_for('home'))

    return render_template("sign-up.html")

Answer 1

在 Postgresql 中更新表。使 ID 自动递增。

或为 id 提供数据（已弃用）

sqlalchemy.exc.IntegrityError: (sqlite3.IntegrityError) NOT NULL 约束失败：user.id

1 个答案: