Quoted string in templates - templates

Question

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.

Answer 1

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)
}
}

Answer 2

Using the least amount of editing to your code sample:
type TplCtx struct {
UserEmail *string
}
and
t.Execute(os.Stdout, &TplCtx{nil})