server.py 文件源码

def login():
    """Attempt to log the user in"""

    email = request.form.get("email")
    password = request.form.get("password")

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

    if existing_email is not None and existing_email.password == password:
        # add user to session
        session["user_id"] = existing_email.user_id

        flash("Successfully logged in!")
        return redirect('/homepage')

    elif existing_email is None:
        flash("Incorrect email.")
        return redirect('/')
    else:
        flash("Incorrect password.")
        return redirect('/')