英文:
Beego Session Not Passing Data to Template Automatically
问题
在使用this.GetSession("session_key")获取类型为map[string]interface{}的会话信息后，我必须显式设置上下文并对会话进行类型断言，以便将数据明确传递给模板。
// 获取会话profile := this.GetSession("profile")// 必须将数据添加到模板的上下文中this.Data["nickname"] = profile.(map[string]interface{})["nickname"].(string)this.Data["picture"] = profile.(map[string]interface{})["picture"].(string)// 渲染模板this.TplNames = "user.html"
会话数据（类型为map[string]interface{}）如下所示：
{"nickname": "joe", "picture": "urltotheimg"}
然而，根据Beego的会话文档，似乎会话会隐式传递，无需进行任何类型断言或上下文传递（模板可以直接访问会话值，例如{{.nickname}}和{{.picture}}）。
这是在重定向到/user之前设置会话的控制器：
// 继承Beego的基础控制器type MyController struct {beego.Controller}func (this *MyController) Get() {// 在此处获取令牌的代码// 获取用户信息client := conf.Client(oauth2.NoContext, token)resp, err := client.Get("https://" + domain + "/userinfo")if err != nil {this.Redirect("/error", 500)return}// 读取用户信息的主体raw, err := ioutil.ReadAll(resp.Body)defer resp.Body.Close()if err != nil {this.Redirect("/error", 500)return}// 反序列化配置文件的JSONvar profile map[string]interface{}if err := json.Unmarshal(raw, &profile); err != nil {this.Redirect("/error", 500)return}// 将信息保存到会话中this.SetSession("profile", profile)// 重定向到/userthis.Redirect("/user", 301)}
这是/user的控制器：
type UserController struct {beego.Controller}func (this *UserController) Get() {// 获取保存的会话profile := this.GetSession("profile")// 如果不在此处设置模板数据，会话数据将无法在user.html中使用this.Data["nickname"] = profile.(map[string]interface{})["nickname"].(string)this.Data["picture"] = profile.(map[string]interface{})["picture"].(string)this.TplNames = "user.html"}
只有这样，我才能将模板映射到数据，如下所示：
<img src="{{ .picture }}"><p>Hello, {{ .nickname }}</p>
我相当确定需要设置模板数据，只是不确定为什么上述文档没有这样做。
如果有任何帮助，将不胜感激。
英文:
Upon getting session information of type map[string]interface{} with this.GetSession("session_key"), I did have to explicitly set the context and type assert the session like this in order to explicitly pass the data to the template.
// Get the sessionprofile := this.GetSession("profile")// Have to add data to the template's contextthis.Data["nickname"] = profile.(map[string]interface{})["nickname"].(string)this.Data["picture"] = profile.(map[string]interface{})["picture"].(string)// Render templatethis.TplNames = "user.html"
The session data (type map[string]interface{}) looks like this:
{"nickname": "joe", "picture": "urltotheimg"}
However, according to the Beego's session <a href="http://beego.me/docs/mvc/controller/session.md">doc</a>, it looks like the session is passed implicitly without any need of type assertions or context passing (the template has immediate access to session values i.e. {{.nickname}} and {{.picture}})
This is the controller setting the session before redirecting to /user
// Inherit beego's base controllertype MyController struct {beego.Controller}func (this *MyController) Get() {// code for getting token here// Getting the User informationclient := conf.Client(oauth2.NoContext, token)resp, err := client.Get("https://" + domain + "/userinfo")if err != nil {this.Redirect("/error", 500)return}// Reading the body for user's informationraw, err := ioutil.ReadAll(resp.Body)defer resp.Body.Close()if err != nil {this.Redirect("/error", 500)return}// Unmarshalling the JSON of the Profilevar profile map[string]interface{}if err := json.Unmarshal(raw, &profile); err != nil {this.Redirect("/error", 500)return}// Saving the information to the session.this.SetSession("profile", profile)// redirect to /userthis.Redirect("/user", 301)}
This is the controller of "/user"
type UserController struct {beego.Controller}func (this *UserController) Get() {// get the saved sessionprofile := this.GetSession("profile")// without setting the template data here, the session data won't be// available in user.htmlthis.Data["nickname"] = profile.(map[string]interface{})["nickname"].(string)this.Data["picture"] = profile.(map[string]interface{})["picture"].(string)this.TplNames = "user.html"}
Only this then I can map the template to the data like this:
<img src="{{ .picture }}"><p>Hello, {{ .nickname }}</p>
I'm quite sure it's necessary to set the template data. I'm just not sure why the above doc didn't do that.
Any help would be appreciated.
答案1
得分: 1
我刚刚尝试运行了Beego快速入门项目，并成功运行了它。
请确保已安装beego和bee。在使用bee new projectname创建新项目后，确保编辑projectname/conf/app.conf文件并添加sessionon = true：
appname = quickstarthttpport = 8080runmode = devsessionon = true
我创建了一个重定向控制器：
type RedirectController struct {beego.Controller}func (c *RedirectController) Get() {profile := make(map[string]interface{})profile["nickname"] = "用户的昵称"profile["picture"] = "/path/to/img.jpg"c.SetSession("profile", profile)c.Redirect("/", 301)}
主控制器：
type MainController struct {beego.Controller}func (c *MainController) Get() {profile := c.GetSession("profile")c.Data["nickname"] = profile.(map[string]interface{})["nickname"]c.Data["picture"] = profile.(map[string]interface{})["picture"]c.TplNames = "index.tpl"}
我的index.tpl文件：
<p>昵称：{{.nickname}}</p><p>图片：{{.picture}}</p>
以及路由器：
func init() {beego.Router("/", &controllers.MainController{})beego.Router("/redirect", &controllers.RedirectController{})}
我还建议您使用一个结构体来存储配置文件的值，例如：
// 定义结构体。type Profile struct{Nickname stringPicture string}// 保存用于模板渲染。this.Data["profile"] = &Profile{Nickname:"astaxie", Picture:"img.jpg"}// 并像这样渲染它：昵称：{{.profile.Nickname}}图片：{{.profile.Picture}}
请确保阅读这个以了解如何进行模板渲染。希望这就是您所询问的内容，如果不是，请编辑您的问题并添加更多有用的信息，我将编辑此答案。
英文:
I just tried running the Beego quickstart project and ran it successfully.
Make sure you have both the beego and bee installed. After creating a new project with bee new projectname make sure you edit the projectname/conf/app.conf file and add the sessionon = true:
appname = quickstarthttpport = 8080runmode = devsessionon = true
I created a redirect controller like:
type RedirectController struct {beego.Controller}func (c *RedirectController) Get() {profile := make(map[string]interface{})profile["nickname"] = "User's Nickname"profile["picture"] = "/path/to/img.jpg"c.SetSession("profile", profile)c.Redirect("/", 301)}
The main controller:
type MainController struct {beego.Controller}func (c *MainController) Get() {profile := c.GetSession("profile")c.Data["nickname"] = profile.(map[string]interface{})["nickname"]c.Data["picture"] = profile.(map[string]interface{})["picture"]c.TplNames = "index.tpl"}
My index.tpl file:
<p>Nickname: {{.nickname}}</p><p>Picture: {{.picture}}</p>
And the router:
func init() {beego.Router("/", &controllers.MainController{})beego.Router("/redirect", &controllers.RedirectController{})}
I would also recommend you to use a structure to store the profile values like:
// Define struct.type Profile struct{Nickname stringPicture string}// Save it for template rendering.this.Data["profile"] = &Profile{Nickname:"astaxie", Picture:"img.jpg"}// And render it like this:Nickname: {{.profile.Nickname}}Picture: {{.profile.Picture}}
Make sure to read this to understand how template rendering is done. I hope this is what you were asking for, if not, please edit your question and add more helpful information and I will edit this answer.
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