Go:模板中的引号字符串 [英] Go: quoted string in templates
问题描述
我想把我的html模板(实际上是JavaScript的一部分)放在null或带有email的字符串中:
var email = null ;
//或字符串:
var email =somebody@somewhere.com;
但带模板
var email = {{.Email}};
每次获得带引号的字符串:
var email =null;
var email =somebody@somewhere.com;
如何解决它?
编辑:这是我的代码: http://play.golang.org/p/8k4s8dv2PE
你可以看到Go用引号将字符串括起来,并删除注释 - 存在预处理或后处理。
如果没有看到您的代码,我可以做的最好的办法是提供一个示例,显示您的必需功能。
如果我不得不猜测,我会说您传入的数据是一个字符串,而不是字符串指针。一个字符串的值不能是nil / null,只能是一个字符串指针。虽然这会产生一个,而不是空(这里演示的),所以我只能想象这是你在代码中做的奇怪事情。
为了防止出现link-rot,我重复了下面的代码示例,尽管它值得点击链接查看输出结果。
必需的功能:
<$ p $ (
log
os
html / template
$ b)
$ b $
$ b type TemplateData struct {
Email * string
}
func main(){
const temp =< script> ; var email = {{.Email}};< / script> \\\
$ b $:template.Must(template.New(email_template).Parse(temp))
email:=somebody@somewhere.com
err:= t.Execute(os.Stdout,TemplateData {
Email:& email,
})
if err!= nil {
log.Println(execu ting template:,err)
}
err = t.Execute(os.Stdout,TemplateData {
Email:nil,
})
if err!=无{
log.Println(执行模板:,错误)
}
}
尝试使用空字符串:
包主要
导入(
log
os
html / template
)
类型TemplateData struct {
电子邮件字符串
}
func main(){
const temp =< script> var email = {{.Email }};< / script> \\\
t:= template.Must(template.New(email_template).Parse(temp))
email:=somebody @ somewhere.com
err:= t.Execute(os.Stdout,TemplateData {
Email:email,
})
if err!= nil {
log .Println(execution template:,err)
}
err = t.Execute(os.Stdout,TemplateData {
})
if err!= nil {
log.Println(正在执行的模板:,err)
}
}
I want to put in my html template (actually JavaScript part) null or string with email:
var email = null;
// or a string:
var email = "somebody@somewhere.com";
But with template
var email = {{.Email}};
I get quoted string everytime:
var email = "null";
var email = "somebody@somewhere.com";
How to fix it?
EDIT: here is my code: http://play.golang.org/p/8k4s8dv2PE
You can see Go surrounds string with quotes and removes comment - there is pre or post processing.
Without seeing your code, the best I can do is provide an example that shows your required functionality.
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.
To prevent link-rot, I've duplicated the code examples below, though it's worth clicking through the links to see their output.
Required Functionality:
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 := "somebody@somewhere.com"
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)
}
}
Trying to use a "null" string:
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 := "somebody@somewhere.com"
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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