beego增加用户自定义模板函数，index从1开始

func Indexaddone(index int) (index1 int) {
	index1 = index + 1
	return
}

beegoTplFuncMap["indexaddone"] = Indexaddone

{{range $index, $elem :=.Category}}
         <tr>
         <input type="hidden" id="categoryid" name="{{.Id}}" value="{{.Id}}" />
          <th> {{indexaddone $index}}</th>

func Substr(s string, start, length int) string {
	bt := []rune(s)
	var ss string


	if start < 0 {
		start = 0
	}
	if start > len(bt) {
		start = start % len(bt)
	}
	var end int
	if (start + length) > (len(bt) - 1) {
		end = len(bt)
		//		ss = "   "
		ss = string(bt[start:end])
	} else {
		end = start + length
		ss = "..."
		bt1 := []rune(ss)
		ss = string(append(bt[start:end], bt1[0:3]...))
	}
	//	bt1 := []rune(ss)
	return ss //string(append(bt[start:end], bt1[0:3]...)) //
}

//自定义模板函数，序号加1
func Indexaddone(index int) (index1 int) {
	index1 = index + 1
	return
}


func main() {
	beego.AddFuncMap("indexaddone", Indexaddone) //模板中使用{{indexaddone $index}}或{{$index|indexaddone}}