Vapor 如何通过电子邮件查找用户

Question

如何在登录方法中通过电子邮件正确找到用户并返回该用户或返回错误， 我试过了：

    func login(_ req: Request) throws -> Future<User> {
    return try req.content.decode(User.self).map { loginUser in
        let query = User.query(on: req)
        return query
            .filter(\.email == loginUser.email)
            .first()
            .flatMap { user in
                return user!.save(on: req)
            }

        }
}

但我得到了

无法将“EventLoopF​​uture”类型的返回表达式转换为“用户”类型的返回

Answer 1

func login(_ req: Request) throws -> Future<User> {
    return try req.content.decode(User.self).flatMap { loginUser in
        return User.query(on: req)
            .filter(\.email == loginUser.email)
            .first()
            .unwrap(or: Abort(.notFound, reason: "User not found"))
    }
}