问题
I am experimenting with the package http/template
.
I have also already managed that e.g. the header, footer, navbar and so on were included in the base template:
{{ define "base" }}
<!DOCTYPE html>
<html lang="en">
<!-- Start Head -->
<head>
{{ template "head" }}
</head>
<!-- End Head -->
<!-- Start Body -->
<body>
{{ template "navbar" }}
{{ template "content" }}
{{ template "footer" }}
</body>
<!-- End Body -->
</html>
{{ end }}
404 page:
{{ define "content" }}
[...]
<h1 class="text-light text-right">404</h1>
<small>{{.CurrentURL}}</small>
[...]
{{ end }}
So here the variable CurrentURL
should be replaced by the current URL.
However, this is only displayed empty (""
) on the website:
<small></small>
But now I want to replace a variable, which is displayed on the web page only as "".
Go Code: Parser:
func (parser *TemplateParser) ParseTemplate(name string) (tpl *template.Template, err error) {
root, err := template.New("root").Parse(rootTmpl)
// ...
return root.ParseFiles(files...)
}
Route:
func (ws *WebServer) Exec(name string, r *http.Request, w http.ResponseWriter, data map[string]interface{}) (err error) {
// ...
// add default data
data["CurrentURL"] = r.URL.RequestURI()
// ...
return tpl.Execute(w, data)
}
Even with an array, I can't use range
etc:
type Test struct {
CurrentURL string
C []string
}
t := Test{
CurrentURL: "Current URL",
C: []string {"C1", "c2", "ccc4"},
}
tpl.Execute(w, t)
<ul>
{{range .C}}
<li>{{.}}</li>
{{end}}
</ul>
<!-- No <li></li> is created -->
What am I doing wrong?
回答1:
You have to pass the context to the instantiated templates. Use
{{ template "content" .}}
to pass the data in .
to the content
template.
回答2:
You're not passing any data to the child templates. Per the docs:
{{template "name"}}
The template with the specified name is executed with nil data.
{{template "name" pipeline}}
The template with the specified name is executed with dot set
to the value of the pipeline.
来源:https://stackoverflow.com/questions/65582487/placeholders-are-not-replaced