Question

我在routes / api.php中使用Laravel 5.5 API路由来注册这样的新用户......

Route :: post（＆＃39; users /＆＃39;，function（Request $ request）{

    $user = new User;

    if (Input::get('name')) {
        $user->name = $request->input('name');
    }

    if (Input::get('email')) {
        $user->name = $request->input('email');
    }

    if (Input::get('password')) {
        $user->name = $request->input('password');
    }

    $user->save();

）};

但是如果我在数据库中已有一个匹配的电子邮件地址，那么我会收到一个SQL错误，因为该字段设置为唯一。

在尝试将电子邮件发送到数据库之前，如何检查电子邮件是否重复？

Answer 1

有几种方法可以做到这一点。一，使用FormRequests并定义规则：

public function rules()
{
    return [
        'email' => 'required|unique:users'
    ];
}

两，使用控制器上的ValidatesRequests特性并在方法中调用validate：

$this->validate($request, [...rules...])

如果验证失败，它会将用户重新定向并返回错误，或者如果ajax，则使用错误包发送json响应。

https://laravel.com/docs/5.5/validation#creating-form-requests

https://laravel.com/docs/5.5/validation#quick-writing-the-validation-logic

Answer 2

请尝试以下。

    # Hyperparameter definition
############################################################
epochs = 100000  # Global steps
t_max = 1000  # Thread steps
max_grad_norm = 0.5
alpha = 0.99
gamma = 0.99
#############################################################

ckpt_path = 'ckpt/checkpoints'
log_path = 'logs'


def test(ac, load_path, sess):
    ac.load(load_path)
    env = gym.make('Breakout-v0')

    while True:
        obs = env.reset()
        state_c, state_h = ac.init_lstm_c, ac.init_lstm_h
        done = False
        while not done:
            action, _, state_c, state_h = ac.step(sess, obs, state_c, state_h)
            obs, _, done, _ = env.step(action)


def train(n_epochs, t_max, gamma, ac, sess):
    env = gym.make("Breakout-v0")
    save_dir = os.path.join(log_path)
    writer = tf.summary.FileWriter(save_dir)
    for ep in range(n_epochs):
        ep_obs, ep_disc_rew, m_rew, ep_act, ep_vals, state_c, state_h = process_episode(sess, ac, env, t_max, gamma)
        log = ac.learn(sess, ep_obs, state_c, state_h, ep_disc_rew, m_rew, ep_act, ep_vals)
        step = tf.train.get_global_step().eval(session=sess)
        writer.add_summary(log, global_step=step)


def process_episode(sess, ac, env, t_max, gamma):
    ep_observations, ep_rewards, ep_actions, ep_values = [], [], [], []
    done = False
    t = 0
    observation = env.reset()
    state_c, state_h = ac.c_init, ac.h_init

    while t < t_max and not done:
        action, value, state_c, state_h = ac.step(sess, observation, state_c, state_h)
        ep_observations.append(observation)
        ep_values.append(value)
        ep_actions.append(action)
        observation, reward, done, _ = env.step(action)
        ep_rewards.append(reward)
    ep_disc_rewards = discount_rewards(ep_rewards, gamma)
    t_rew = np.sum(ep_rewards)
    return ep_observations, ep_disc_rewards, t_rew, ep_actions, ep_values, state_c, state_h


if __name__ == '__main__':

    config = tf.ConfigProto(allow_soft_placement=True)
    config.gpu_options.allow_growth = True
    server = tf.train.Server.create_local_server()
    gs = tf.train.create_global_step(tf.get_default_graph())
    env = gym.make("Breakout-v0")
    ac = ActorCritic(env.observation_space, env.action_space)
    with tf.train.MonitoredTrainingSession(
            master=server.target, checkpoint_dir=ckpt_path, save_summaries_steps=None, config=config) as sess:
        train(epochs, t_max, gamma, ac, sess)
    sess.stop()

Laravel API注册用户 - 检查重复的电子邮件

2 个答案: