如何使用 Revel / Golang 从控制器设置持久全局模板变量



我是Golang的新手,我正在从Node.js服务器切换到Golang服务器,我正在尝试重写我之前为Node编写的应用程序。

我想在用户登录时设置模板变量,但我不确定如何,是的,我已经尝试过谷歌搜索它。

这是我的注册用户控制器:

func (c User) RegisterUser(user_email, user_password,
    user_password_confirmation, user_first_name,
    user_last_name string) revel.Result {
    // Validate Email
    c.Validation.Required(user_email).Message("Username is required")
    c.Validation.Email(user_email).Message("Email is not a valid email")
    c.Validation.MinSize(user_email, 5).Message("Email must be greater than 5 characters")
    // Validate Password
    c.Validation.Required(user_password).Message("Password is required")
    c.Validation.MinSize(user_password, 5).Message("Password must be greater than 5 characters.")
    // Validate Password Confirmation
    c.Validation.Required(user_password_confirmation).Message("Password Confirmation is required")
    c.Validation.MinSize(user_password_confirmation, 5).Message("Password must be greater than 5 characters.")
    c.Validation.Required(user_password == user_password_confirmation).Message("Your passwords do not match")
    // Validate First Name
    c.Validation.Required(user_first_name).Message("First Name is required")
    c.Validation.MinSize(user_first_name, 3).Message("Your First Name must be greater than 3 characters")
    // Validate Last Name
    c.Validation.Required(user_last_name).Message("Last Name is required")
    c.Validation.MinSize(user_last_name, 3).Message("Your Last Name must be greater than 3 characters")
    // If anything wasn't right, set flash and display errors to user
    if c.Validation.HasErrors() {
        c.Validation.Keep()
        c.FlashParams()
        return c.Redirect(User.Register)
    }
    // Hash The Users Password
    password := []byte(user_password_confirmation)
    hashedPassword, err := bcrypt.GenerateFromPassword(password, 10)
    if err != nil {
        c.Flash.Error("Invalid Username or Password Combination")
        return c.Redirect(User.Register)
    }
    // Connect to database
    db, err := sql.Open("mysql", "root:******@/WebRTC")
    if err != nil {
        c.Flash.Error("Unable to connect to database. Try again later!")
        return c.Redirect(User.Register)
    }
    defer db.Close()
    // Ping the database, ensure there is a connection
    err = db.Ping()
    if err != nil {
        c.Flash.Error("Unable to connect to database. Try again later!")
        return c.Redirect(User.Register)
    }
    // Prepare SQL Statement for Security
    stmtIns, err := db.Prepare("INSERT INTO users (user_email, user_first_name, user_last_name, " +
        "user_password_hash, user_created_at, user_created_ip, user_last_ip) VALUES (?, ?, ?, ?, ?, ?, ?)")
    if err != nil {
        c.Flash.Error("Unable to Register you. Please try again later")
        return c.Redirect(User.Register)
    }
    defer stmtIns.Close()
    // Insert Data into Database
    _, err = stmtIns.Exec(user_email, user_first_name, user_last_name, hashedPassword,
        time.Now().Local(), c.Request.RemoteAddr, c.Request.RemoteAddr)
    if err != nil {
        c.Flash.Error("Unable to register you. Please try again later")
        return c.Redirect(User.Register)
    }
    // Here I want to add the global template variable
    return c.Redirect(User.Register)
}

我已经读过c.RenderArgs,但它似乎没有做我想要的。

我希望能够设置用户的用户名,以便我可以在导航栏中显示它,以便他们知道他们已登录。

如果你

使用c.RenderArgs,你就走在正确的轨道上,除非我误解了你的意图。

下面是如何使用它的示例(或者更确切地说,演练)(取自 Revel 的预订示例应用程序):

  1. init.go:注册一个拦截器以在采取行动之前添加用户的信息(AddUser将在Render之前触发)。

  2. app.go:检查用户是否已连接,如果是,则将用户数据存储在RenderArgs图中,如下所示:

c.RenderArgs["user"] = user

  1. 第 31 行处理模型。

  2. 标头.html:传入用户名模板变量。

我希望这有所帮助。

编辑:我可能应该补充一点,用户的用户名在登录时存储在会话中。它用于检索更多信息。

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