我正在使用 Rust 和 Rocket Framework(v0.5) 编写一个网站。我正在使用 Handlebars 并在打开我的网站时收到此错误：
>> Matched: (index) GET /
>> Handlebars: Error rendering "index" line 9, col 1: Helper not defined: Path(Relative(([Named("parent")], "parent")))
>> Template 'index' failed to render.
>> Outcome: Failure
>> No 500 catcher registered. Using Rocket default.
>> Response succeeded.
这是我正在使用的 Rust 代码：
#[macro_use]
extern crate rocket;
use rocket::Request;
use rocket_dyn_templates::Template;
#[derive(serde::Serialize)]
struct BoardContext {
parent: &'static str,
}
#[derive(serde::Serialize)]
struct AboutContext {
parent: &'static str,
}
#[derive(serde::Serialize)]
struct LegalsContext {
parent: &'static str,
}
#[derive(serde::Serialize)]
struct NotFoundContext {
parent: &'static str,
url: String,
}
#[get("/")]
fn index() -> Template {
Template::render("index", &BoardContext { parent: "layout" })
}
#[get("/about")]
fn about() -> Template {
Template::render("about", &AboutContext { parent: "layout" })
}
#[get("/legals")]
fn legals() -> Template {
Template::render("legals", &AboutContext { parent: "layout" })
}
#[catch(404)]
fn not_found(req: &Request) -> Template {
Template::render(
"not_found",
NotFoundContext {
parent: "layout",
url: req.uri().to_string(),
},
)
}
#[launch]
fn rocket() -> _ {
rocket::build()
.register("/", catchers![not_found])
.mount("/", routes![index, about, legals])
.attach(Template::fairing())
}
这是layout.html.hbs文件：
{{#*inline "page"}}
<section id="message_board">
<h1>Hi, there!</h1>
Welcome to my meaningless Website!
</section>
{{/inline}}
{{~> (parent)~}}
这是我的 layout.html.hbs 文件：
<!doctype html>
<html>
<head>
<title>website</title>
</head>
<body>
{{> header}}
{{~> page}}
{{> footer}}
</body>
</html>
我尝试添加一个 Handlebars 助手（就像在 Rocket 的示例中一样），但这并没有解决问题。