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编译后运行，提示以下内容：
2019/05/23 16:38:17.862 [E] [template.go:176] parse template err: article-detail.tpl template: article-detail.tpl:29: function "avatar" not defined
2019/05/23 16:38:17.884 [W] [beego.go:103] template: article-detail.tpl:29: function "avatar" not defined
panic: template: article-detail.tpl:29: function "avatar" not defined

在上传文件时候，中文的获取后缀名有点问题，
ext :=utils.SubString(filename, strings.LastIndex(filename, "."), 5)
建议换成下面的方式：
ext := path.Ext(filename)

func (this *ListArticleController) Get() {
page, err1 := this.GetInt("p")
title := this.GetString("title")
keywords := this.GetString("keywords")
status := this.GetString("status")
if err1 != nil {
page = 1
}

“title”，“keywords”是从哪里获取的呢?