模板中带引号的字符串 [英] Quoted string in templates

问题描述

我想用电子邮件将HTML模板(实际上是JavaScript部分)放入null或字符串:

I want to put in my html template (actually JavaScript part) null or string with email:

var email = null;
// or a string:
var email = "[e-mail]";

但是带有模板

var email = {{.Email}};

我每次都会得到带引号的字符串:

I get quoted string everytime:

var email = "null";
var email = "[e-mail]";

如何解决?

这是我的代码: http://play.golang.org/p/8k4s8dv2PE

您可以看到Go用引号将字符串引起来并删除注释-进行了预处理或后处理.

You can see Go surrounds string with quotes and removes comment - there is pre or post processing.

推荐答案

在没有看到您的代码的情况下，我能做的最好的就是提供

Without seeing your code, the best I can do is provide an example that shows your required functionality.

如果我不得不猜测，我会说您传递的数据是一个字符串，而不是字符串指针.字符串的值不能为nil/null，只有字符串指针可以.尽管这将产生一个"，而不是一个空"(如此处所示， )，所以我只能想象这是您在代码中所做的事情.

If I had to take a guess, I'd say the data you were passing in was a string, not a string pointer. A string cannot have a value of nil/null, only a string pointer can. Though that would yield a "", not a "null", (as demonstrated here), so I can only imagine that this is something weird you're doing in your code.

为防止链接腐烂，我重复了以下代码示例，尽管值得单击链接以查看其输出.

To prevent link-rot, I've duplicated the code examples below, though it's worth clicking through the links to see their output.

必需的功能:

package main

import (
    "log"
    "os"
    "html/template"
)

type TemplateData struct {
    Email *string
}

func main() {

    const temp = "<script>var email = {{.Email}};</script>\n"

    t := template.Must(template.New("email_template").Parse(temp))
    email := "[e-mail]"
    err := t.Execute(os.Stdout, TemplateData{
        Email: &email,
    })
    if err != nil {
        log.Println("executing template:", err)
    }
    err = t.Execute(os.Stdout, TemplateData{
        Email: nil,
    })
    if err != nil {
        log.Println("executing template:", err)
    }

}

尝试使用空"字符串:

package main

import (
    "log"
    "os"
    "html/template"
)

type TemplateData struct {
    Email string
}

func main() {

    const temp = "<script>var email = {{.Email}};</script>\n"

    t := template.Must(template.New("email_template").Parse(temp))
    email := "[e-mail]"
    err := t.Execute(os.Stdout, TemplateData{
        Email: email,
    })
    if err != nil {
        log.Println("executing template:", err)
    }
    err = t.Execute(os.Stdout, TemplateData{
    })
    if err != nil {
        log.Println("executing template:", err)
    }

}

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