I've written an endpoint in Rust using nickel.rs:
{
let client = client.clone();
let mongodb = MongoRepository::new(client, "rust-users".into());
router.put("/users/:id",middleware!(|request, mut response| {
let id = try_with!(response, {
request.param("id")
.ok_or((StatusCode::BadRequest, "Id parameter required"))
});
let user = try_with!(response, {
request.json_as::<User>()
.map_err(|e|
(StatusCode::BadRequest, format!("{}",e))
)
});
let update_id = try_with!(response, {
mongodb.update_by_id("users", id, user)
.map_err(|e|
(StatusCode::InternalServerError, e)
)
});
ApiResult::Ok(StatusCode::Ok, update_id.to_json())
}));
}
In this line:
let id = try_with!(response, {
request.param("id")
.ok_or((StatusCode::BadRequest, "Id parameter required"))
});
request
is borrowed in an immutable state, but in this line:
let user = try_with!(response, {
request.json_as::<User>()
.map_err(|e|
(StatusCode::BadRequest, format!("{}",e))
)
});
request is borrowed in a mutable state. This causes the following error:
error: cannot borrow `*request` as mutable because it is also borrowed
as immutable
I tried to fix this error by wrapping the id
line in a separate scope but the issue persisted.
I'm not sure how else to fix the issue. Is there something else that's wrong with the code?