Let me quick explain my case, I am using Actix web framework, by connect to database Tarantool, assume tble_user fields id(uuid), first_name, last_name,email. After I execute query select the result response need to use Serde Deserialize to my Struct all field success except field id contain data type uuid can't deserialize
I am using this crate :https://github.com/zheludkovm/RustyTarantool/blob/master/src/tarantool/tools.rs#L24
I am using this crate :https://github.com/zheludkovm/RustyTarantool/blob/master/src/tarantool/tools.rs#L24
Do you mean
Uuid from the uuid crate? Do you need some specific way of storing it in the table?
Have you enabled the
uuid's serde feature?
Yes uuid's serde feature
Something like
#[serde(with = "uuid::serde::compact")] specified for that specific field, I think.
Not found
uuid::serde::compact
Hello, I found a lot of github issues about this from 2015 but they seem all resolved. I also see the RFC that should prevent this but as far as I can tell, on stable 1.64 I can compile code that leaks a private type when it is returned from or a parameter to a function defined in a public trait.
Perhaps I am simply misunderstanding...
Here is an example that I think should not compile https://play.rust-lang.org/?version=stable&mode=debug&edition=2021&gist=0280d55b3d6bb68aeb450608c8f115af
Perhaps I am simply misunderstanding...
Here is an example that I think should not compile https://play.rust-lang.org/?version=stable&mode=debug&edition=2021&gist=0280d55b3d6bb68aeb450608c8f115af
2 replies
@kushudai: IIUC, this is expected as your type is marked
pub so it's public despite being in a private module. If you mark it pub(crate) instead, you'll see a privacy error.
4 replies
quick question: why in Rust 2021, I still need this
extern crate?
It would be problematic to automagically pull in
alloc in no_std environment without memory allocation, IIUC. There's a bit of discussion in rust-lang/rust#90507
1 reply
Is there an equivalent to this in tokio?
smol::io::BufReader::new(smol::Unblock::new(reader))
<del>Удачи в поисках :-) вообще эта комната не очень активна, но вдруг повезёт.</del>
On the second glance, I'd note that this it not a Russian-language room, so you may have posted this to the wrong toom.
On the second glance, I'd note that this it not a Russian-language room, so you may have posted this to the wrong toom.
Hey everyone. I'm trying to make a library that serializes things using serde but I'd like better type-safety. Specifically: the format is much more restrictive than serde and I'd like field types incompatible with my format to be rejected at compile-time. I'd also like to have a separate trait/derive macro for this. Is there a good example of this or something similar being done in a crate somewhere?
Hi, is it possible to chain method that does not return a
Self?
1 reply
obj.methodA().methodB() works if methodB is defined on the return type of methodA
Sorry I know that this channel is not the RustCrypto but I could not find it, so I decide to post my doubt here.
thanks to the Language Server Protocol (and rust-analyzer in particular), you can use pretty much any modern IDE/advanced editor and get great rust support - personally I use neovim, but there are also a lot of people using plain vim, emacs or VSCode. Just make sure whatever you choose supports LSP.
I need visual studio... I will try it ) thanks
For me enough Far Manager Editor or Midnight Commander Editor )
This program
struct Foo {
someString: String,
}
fn main() {
let x: Vec<Foo> = Vec::new();
x.sort_by_key(|foo| &foo.someString);
}does not compile because
lifetime may not live long enough
returning this value requires that `'1` must outlive `'2`I guess I should use x.sort_by() instead in this case
Howdy, Does anyone know a good room to discuss rust-bert related topics?
does anybody know why cargo publish ignores the actual value of CARGO_PKG_VERSION? i'm overriding the pkg version in build.rs for a project using:
println!("cargo:rustc-env=CARGO_PKG_VERSION=1.1.1");but cargo publish seems to ignore that version and goes with the version in Cargo.toml. note in case of cargo build this is not the case.
yooo! Is there any way to extract the "index" (order of occurrence) of a struct field in a macro like this:
macro_rules! example {
(struct $name:ident {
$($field_name:ident: $field_type:ty,)*
}) => {
struct $name {
$($field_name: $field_type,)*
}
}
}such that
example! {
struct Struct {
a: i32,
b: i32,
}
}would have the index 0 associated to a and 1 to b etc. (for use in a particular impl)? =)
1 reply
Hey all - got a question if someone mind helping. Got stuck on trying to understand why I get this error
error[E0499]: cannot borrow `asks` as mutable more than once at a time
--> src\domain\order.rs:148:37
|
139 | ... for lvl in asks.iter_mut() {
| ---------------
| |
| first mutable borrow occurs here
| first borrow later used here
...
148 | ... asks.push_front(new_level);
| ^^^^ second mutable borrow occurs hereHere is the actual impl
Side::ASK => {
let mut asks = self.ask;
let top_of_the_book = asks.front();
match top_of_the_book {
Some(mut level) => {
if level.price == order_entry.price {
level = &Self::update_level(level, &order_entry);
} else {
for lvl in asks.iter_mut() {
if lvl.price > order_entry.price {
let mut entries = HashMap::new();
entries.insert(order_entry.user_order_id.clone(), order_entry.clone());
let new_level = OrderLevel {
price: order_entry.price.clone(),
order_entries: entries,
};
asks.push_front(new_level);
}
if lvl.price < order_entry.price {
continue;
}
if lvl.price == order_entry.price {
lvl.order_entries.insert(order_entry.user_order_id.clone(),
order_entry.clone());
}
}
}
}Essentially, I just want to update the order book level with the order request. But it seems like I cant simply iterate over the levels and find one to update or insert new. How would this be done in idiomatic rust?
9 replies
gitter having a bit of a moment there...