detail.html

<h1>{{ .Question.QuestionText }}</h1>
{{ if .ErrorMessage }}<p><strong>{{ .ErrorMessage }}</strong></p>{{ end }}
<form action="{{ url "vote" "question_id" (print .Question.ID) }}" method="post">
    {{ range $i, $choice := .Question.Choices }}
	<input type="radio" name="choice" id="choice{{ $i }}" value="{{ $choice.ID }}">
	<label for="choice{{ $i }}">{{ $choice.ChoiceText }}</label><br>
	{{end}}
	<input type="submit" value="Vote">
</form>