Struct Bound 

pub struct Bound<M: Model>(pub M);

A model resolved from a route parameter.

Looks the row up by the model’s route key — the primary key unless the model says otherwise, which is how /posts/{post} binds by slug while /users/{user} binds by id.

Which parameter

The one named after the model, lower-cased: Post reads {post}. Laravel’s convention, and it is worth keeping to — a route whose parameter is named something else should say so with BoundAs, not leave the reader guessing which of two parameters was meant.

Failures

• no such parameter on the route → a 500, because that is a wiring mistake rather than anything the caller did;
• no such row → a 404 naming the model, exactly as find_or_fail does.

It does not authorise

Binding finds the row; it does not ask whether this caller may have it. A draft post binds happily for a stranger. Follow it with a policy — or, better, with a request contract that authorises before the action runs at all.

Tuple Fields

0: M

Implementations

impl<M: Model> Bound<M>

pub fn into_inner(self) -> M

The model.

Trait Implementations

impl<M: Model> Deref for Bound<M>

type Target = M

The resulting type after dereferencing.

fn deref(&self) -> &M

Dereferences the value.

impl<M: Model> FromRequest for Bound<M>

fn from_request(request: Arc<Request>) -> BoxedFuture<Result<Self>>

Build Self from the request, or fail with the error the client should see (a 400 for a malformed body, a 422 for a failed contract).