Vyacheslav Odinokov's questions

我有日志记录，它们有指向用户的链接。

日志模型

class Syslog < ApplicationRecord
 belongs_to :user
end

用户模型没有什么特别的，我没有在那里添加 has_many 。

现在当我执行 Syslog.all 时

在视图中我向用户讲话：

    <% @syslogs.each do |syslog| %>
      <tr>
        <td><%= syslog.datetime %></td>
        <td><%= syslog.user.username %></td>
      </tr>
    <% end %>

在日志中我看到正在发出许多重复的请求。

  Syslog Load (1.2ms)  SELECT `SYSLOG`.* FROM `SYSLOG` INNER JOIN `USERS` ON `USERS`.`I_ID` = `SYSLOG`.`I_UID` WHERE (I_ELCAT <= '3') LIMIT 50
  ↳ app/views/syslogs/index.html.erb:13
  User Load (1.4ms)  SELECT `USERS`.* FROM `USERS` WHERE `USERS`.`I_ID` = 1 LIMIT 1
  ↳ app/views/syslogs/index.html.erb:16
  CACHE User Load (0.0ms)  SELECT `USERS`.* FROM `USERS` WHERE `USERS`.`I_ID` = 1 LIMIT 1
  ↳ app/views/syslogs/index.html.erb:16
  CACHE User Load (0.0ms)  SELECT `USERS`.* FROM `USERS` WHERE `USERS`.`I_ID` = 1 LIMIT 1
  ↳ app/views/syslogs/index.html.erb:16
  CACHE User Load (0.0ms)  SELECT `USERS`.* FROM `USERS` WHERE `USERS`.`I_ID` = 1 LIMIT 1
  ↳ app/views/syslogs/index.html.erb:16
  CACHE User Load (0.0ms)  SELECT `USERS`.* FROM `USERS` WHERE `USERS`.`I_ID` = 1 LIMIT 1
  ↳ app/views/syslogs/index.html.erb:16
  CACHE User Load (0.0ms)  SELECT `USERS`.* FROM `USERS` WHERE `USERS`.`I_ID` = 1 LIMIT 1
  ↳ app/views/syslogs/index.html.erb:16
  CACHE User Load (0.0ms)  SELECT `USERS`.* FROM `USERS` WHERE `USERS`.`I_ID` = 1 LIMIT 1
  ↳ app/views/syslogs/index.html.erb:16
  CACHE User Load (0.0ms)  SELECT `USERS`.* FROM `USERS` WHERE `USERS`.`I_ID` = 1 LIMIT 1
  ↳ app/views/syslogs/index.html.erb:16
  CACHE User Load (0.0ms)  SELECT `USERS`.* FROM `USERS` WHERE `USERS`.`I_ID` = 1 LIMIT 1
  ↳ app/views/syslogs/index.html.erb:16
  CACHE User Load (0.0ms)  SELECT `USERS`.* FROM `USERS` WHERE `USERS`.`I_ID` = 1 LIMIT 1
  ↳ app/views/syslogs/index.html.erb:16
  CACHE User Load (0.0ms)  SELECT `USERS`.* FROM `USERS` WHERE `USERS`.`I_ID` = 1 LIMIT 1
  ↳ app/views/syslogs/index.html.erb:16
  CACHE User Load (0.0ms)  SELECT `USERS`.* FROM `USERS` WHERE `USERS`.`I_ID` = 1 LIMIT 1
  ↳ app/views/syslogs/index.html.erb:16
  CACHE User Load (0.0ms)  SELECT `USERS`.* FROM `USERS` WHERE `USERS`.`I_ID` = 1 LIMIT 1
  ↳ app/views/syslogs/index.html.erb:16
  CACHE User Load (0.0ms)  SELECT `USERS`.* FROM `USERS` WHERE `USERS`.`I_ID` = 1 LIMIT 1
  ↳ app/views/syslogs/index.html.erb:16
  User Load (1.1ms)  SELECT `USERS`.* FROM `USERS` WHERE `USERS`.`I_ID` = 2 LIMIT 1
  ↳ app/views/syslogs/index.html.erb:16
  CACHE User Load (0.0ms)  SELECT `USERS`.* FROM `USERS` WHERE `USERS`.`I_ID` = 2 LIMIT 1
  ↳ app/views/syslogs/index.html.erb:16
  CACHE User Load (0.0ms)  SELECT `USERS`.* FROM `USERS` WHERE `USERS`.`I_ID` = 2 LIMIT 1
  ↳ app/views/syslogs/index.html.erb:16
  CACHE User Load (0.0ms)  SELECT `USERS`.* FROM `USERS` WHERE `USERS`.`I_ID` = 2 LIMIT 1
  ↳ app/views/syslogs/index.html.erb:16
  CACHE User Load (0.0ms)  SELECT `USERS`.* FROM `USERS` WHERE `USERS`.`I_ID` = 2 LIMIT 1
  ↳ app/views/syslogs/index.html.erb:16
  CACHE User Load (0.0ms)  SELECT `USERS`.* FROM `USERS` WHERE `USERS`.`I_ID` = 2 LIMIT 1
  ↳ app/views/syslogs/index.html.erb:16
  CACHE User Load (0.0ms)  SELECT `USERS`.* FROM `USERS` WHERE `USERS`.`I_ID` = 2 LIMIT 1
  ↳ app/views/syslogs/index.html.erb:16
  CACHE User Load (0.0ms)  SELECT `USERS`.* FROM `USERS` WHERE `USERS`.`I_ID` = 2 LIMIT 1
  ↳ app/views/syslogs/index.html.erb:16
  CACHE User Load (0.0ms)  SELECT `USERS`.* FROM `USERS` WHERE `USERS`.`I_ID` = 2 LIMIT 1
  ↳ app/views/syslogs/index.html.erb:16
  CACHE User Load (0.0ms)  SELECT `USERS`.* FROM `USERS` WHERE `USERS`.`I_ID` = 2 LIMIT 1
  ↳ app/views/syslogs/index.html.erb:16
  CACHE User Load (0.0ms)  SELECT `USERS`.* FROM `USERS` WHERE `USERS`.`I_ID` = 2 LIMIT 1
  ↳ app/views/syslogs/index.html.erb:16
  CACHE User Load (0.0ms)  SELECT `USERS`.* FROM `USERS` WHERE `USERS`.`I_ID` = 2 LIMIT 1
  ↳ app/views/syslogs/index.html.erb:16
  CACHE User Load (0.0ms)  SELECT `USERS`.* FROM `USERS` WHERE `USERS`.`I_ID` = 2 LIMIT 1
  ↳ app/views/syslogs/index.html.erb:16
  CACHE User Load (0.0ms)  SELECT `USERS`.* FROM `USERS` WHERE `USERS`.`I_ID` = 1 LIMIT 1
  ↳ app/views/syslogs/index.html.erb:16
  CACHE User Load (0.0ms)  SELECT `USERS`.* FROM `USERS` WHERE `USERS`.`I_ID` = 1 LIMIT 1
  ↳ app/views/syslogs/index.html.erb:16
  CACHE User Load (0.0ms)  SELECT `USERS`.* FROM `USERS` WHERE `USERS`.`I_ID` = 1 LIMIT 1
  ↳ app/views/syslogs/index.html.erb:16
  CACHE User Load (0.0ms)  SELECT `USERS`.* FROM `USERS` WHERE `USERS`.`I_ID` = 1 LIMIT 1
  ↳ app/views/syslogs/index.html.erb:16
  User Load (1.3ms)  SELECT `USERS`.* FROM `USERS` WHERE `USERS`.`I_ID` = -20 LIMIT 1
  ↳ app/views/syslogs/index.html.erb:16
  User Load (2.2ms)  SELECT `USERS`.* FROM `USERS` WHERE `USERS`.`I_ID` = -1 LIMIT 1
  ↳ app/views/syslogs/index.html.erb:16
  User Load (1.2ms)  SELECT `USERS`.* FROM `USERS` WHERE `USERS`.`I_ID` = -11 LIMIT 1
  ↳ app/views/syslogs/index.html.erb:16
  CACHE User Load (0.0ms)  SELECT `USERS`.* FROM `USERS` WHERE `USERS`.`I_ID` = -1 LIMIT 1
  ↳ app/views/syslogs/index.html.erb:16
  CACHE User Load (0.0ms)  SELECT `USERS`.* FROM `USERS` WHERE `USERS`.`I_ID` = -11 LIMIT 1
  ↳ app/views/syslogs/index.html.erb:16
  User Load (1.0ms)  SELECT `USERS`.* FROM `USERS` WHERE `USERS`.`I_ID` = -17 LIMIT 1
  ↳ app/views/syslogs/index.html.erb:16
  CACHE User Load (0.0ms)  SELECT `USERS`.* FROM `USERS` WHERE `USERS`.`I_ID` = -1 LIMIT 1
  ↳ app/views/syslogs/index.html.erb:16
  CACHE User Load (0.0ms)  SELECT `USERS`.* FROM `USERS` WHERE `USERS`.`I_ID` = -11 LIMIT 1
  ↳ app/views/syslogs/index.html.erb:16
  CACHE User Load (0.1ms)  SELECT `USERS`.* FROM `USERS` WHERE `USERS`.`I_ID` = -1 LIMIT 1
  ↳ app/views/syslogs/index.html.erb:16
  User Load (2.1ms)  SELECT `USERS`.* FROM `USERS` WHERE `USERS`.`I_ID` = -15 LIMIT 1
  ↳ app/views/syslogs/index.html.erb:16
  CACHE User Load (0.0ms)  SELECT `USERS`.* FROM `USERS` WHERE `USERS`.`I_ID` = -20 LIMIT 1
  ↳ app/views/syslogs/index.html.erb:16
  User Load (1.0ms)  SELECT `USERS`.* FROM `USERS` WHERE `USERS`.`I_ID` = -12 LIMIT 1
  ↳ app/views/syslogs/index.html.erb:16
  User Load (1.0ms)  SELECT `USERS`.* FROM `USERS` WHERE `USERS`.`I_ID` = -13 LIMIT 1
  ↳ app/views/syslogs/index.html.erb:16
  CACHE User Load (0.0ms)  SELECT `USERS`.* FROM `USERS` WHERE `USERS`.`I_ID` = -13 LIMIT 1
  ↳ app/views/syslogs/index.html.erb:16
  CACHE User Load (0.0ms)  SELECT `USERS`.* FROM `USERS` WHERE `USERS`.`I_ID` = -13 LIMIT 1
  ↳ app/views/syslogs/index.html.erb:16
  CACHE User Load (0.0ms)  SELECT `USERS`.* FROM `USERS` WHERE `USERS`.`I_ID` = -13 LIMIT 1
  ↳ app/views/syslogs/index.html.erb:16
  CACHE User Load (0.0ms)  SELECT `USERS`.* FROM `USERS` WHERE `USERS`.`I_ID` = -13 LIMIT 1
  ↳ app/views/syslogs/index.html.erb:16
  CACHE User Load (0.0ms)  SELECT `USERS`.* FROM `USERS` WHERE `USERS`.`I_ID` = -13 LIMIT 1
  ↳ app/views/syslogs/index.html.erb:16
  User Load (0.8ms)  SELECT `USERS`.* FROM `USERS` WHERE `USERS`.`I_ID` = -18 LIMIT 1
  ↳ app/views/syslogs/index.html.erb:16
  Rendered syslogs/index.html.erb within layouts/application (Duration: 163.4ms | Allocations: 64237)
  User Load (1.3ms)  SELECT `USERS`.* FROM `USERS` WHERE `USERS`.`I_ID` = 11 LIMIT 1

事实证明，从技术上讲，首先选择所有日志。然后在循环中为每个日志选择一个用户。

我需要通过一个或最少数量的请求来完成此操作。如何实现这一目标？

我正在编写一个浏览器游戏，任务是：

• 当用户点击“去徒步旅行”时，他选择徒步旅行的持续时间。
• 在活动期间，无论用户的操作如何，都需要在后台的服务器上生成不同的事件。
• 在徒步过程中，当您刷新页面时，您可以看到日志。旅途中发生了什么，如果发生什么事情，它会不断更新。
• 在整个行程中，例如，1 小时内，可能会发生 5 和 50 个事件。

如何实现后台执行定时操作？不在 HTTP 请求上，例如刷新页面时。

以及如何使该操作执行一定的时间？

这样，即使用户不在线并且对于许多用户来说，也可以完成此操作。

如何在低级别处理图形？Windows 开发和 2D 图形。

哪些库用于处理图形？是否可以在没有库的情况下使用图形？

如何在关系是一对一的情况下进行迁移和模型。例如，两个模型：user和address。

连接必须是从用户到地址，以便您可以这样做：user.create_address(*)

所以：user.address.city。

has_one我不知道和有什么区别belongs_to。

描述：
我们有一个带有一个文本字段的输入表单。在字段中输入某个数字后，按提交。

必须向外部 api 服务发出 http 请求。输入字段中写入的过滤器请求数据的位置。

此实现需要：

1. 控制器中的方法search（这将显示带有输入字段的页面）。Submit导致searching同一控制器中的方法。

问题：
如何进行外部 API 调用？
即：

1. 在哪里创建一个包含 API 调用和解析的类和方法的文件？
2. 如何将文件连接到控制器以创建对象并调用方法？
3. 接收到数据后，如何传递给视图？

我正在写一个界面。通过使用 axios 的 api 服务进行 jwt 身份验证。我写了拦截器，如果旧的已经过期，它会重新请求 jwt。

this.$http.interceptors.response.use(null, (error) => {
    if (error.config && error.response && error.response.status === 401) {
        return this.$store.dispatch('auth/refreshtoken').then((res) => {
            if(res.success) {
                error.config.headers.Authorization = 'Bearer ' + this.$store.getters['auth/token'];
                return this.$http.request(error.config);
            } else {
                this.$router.push('/login')
            }
        });
    }
    return Promise.reject(error);
})

现在我在捕捉 401 错误时遇到了问题，如何防止错误输出到 F12 控制台？ Failed to load resource: the server responded with a status of 401 (Unauthorized).

我希望 axios 尝试重新请求 401 错误，但不将错误输出到控制台。

我将用户数据存储在 localStorage 中并通过 Vuex 检索它。我有一个参数，用户是管理员。

如果恶意用户按 F12 并更改控制台中的值，他将获得对管理面板的访问权限。如何避免？

客户端渲染。如果有帮助。我通过 JWT 令牌和刷新令牌获得授权。

我尝试使用 libtcod 库，并且有一个现成的窗口创建功能。

我想学习如何自己在 Windows 和 linux 上创建一个窗口并做一些最少的事情。

如果可能的话，最好没有第三方库。

有没有等效var_dump或类似的东西？

或任何其他用于调试和查看我在这个或那个函数中得到的东西等的类似物。