dousendun8411
2013-11-04 16:02
浏览 150
已采纳

golang-如何在模板中分割字符串

I try to use template.FuncMap but there are panic error

panic: runtime error: invalid memory address or nil pointer dereference

code:

type Article struct{
    Id int
    Title string
    Tags  string
}

var (
    tplFuncMap template.FuncMap 
)

func main() {
    article := &Article{Id:1, Title:"hello world", Tags:"golang,javascript"}
    tplFuncMap =  make(template.FuncMap)
    tplFuncMap["Split"] = Split
    tpl, _ := template.ParseFiles("a.html", "b.html")
    tpl = tpl.Funcs(tplFuncMap)
    tpl.Execute(os.Stdout, article)
}

func Split(s string, d string) []string {
    arr := strings.Split(s, d)
    return arr
}

a.html

//i want to split tags and range
{{$arr := Split .Tags ","}}
{{range $k, $v := $arr}}
    <a href="{{$v}}">{{$v}}</a>
{{end}}

Thanks.

  • 写回答
  • 关注问题
  • 收藏
  • 邀请回答

1条回答 默认 最新

  • duanmiyang6201 2013-11-04 17:43
    已采纳

    You are ignoring the error returned by template.ParseFiles, that will probably tell you your problem. ParseFiles is probably throwing an error because the function Split isn't defined when you parse the template. Never ignore errors.

    Edit

    To make it work, do something like this:

    tplFuncMap =  make(template.FuncMap)  
    tplFuncMap["Split"] = Split  
    tmpl, err = template.New("").Funcs(tplFuncMap).ParseFiles("a.html", "b.html")
    

    The difference is that the FuncMap is defined before the templates are parsed.

    打赏 评论

相关推荐 更多相似问题