How can I call self method from from Command::perform?

[H36615]

     fn update(&mut self, message: Message) -> Command<Message> {
        match message {
            Message::DataRequested => {
                Command::perform(self.controller.get_data_async(), Message::DataResponded)
            }
            ...
        }
    }

error[E0759]: `self` has an anonymous lifetime `'_` but it needs to satisfy a `'static` lifetime requirement
  --> ...\lib.rs:57:50
   |
54 |     fn update(&mut self, message: Message) -> Command<Message> {
   |               --------- this data with an anonymous lifetime `'_`...
...
57 |                 Command::perform(self.controller.get_data_async(), Message::DataResponded)    
   |                                  --------------- ^^^^^^^^^
   |                                  |
   |                                  ...is captured here...
   |
note: ...and is required to live as long as `'static` here
  --> ...\lib.rs:57:17
   |
57 |                 Command::perform(self.controller.get_data_async(), Message::DataResponded) 
   |                 ^^^^^^^^^^^^^^^^

Is it possible to call self.prop.method from Command::perform even though it's requiring self to have static lifetime? I hope the answer is not just Controller::get_data_async().

TIA :)

[yusdacra]

Your get_data_async method borrows some data from self, and Commands require 'static lifetime, but self is not 'static, so Rust complains. You should Clone (.clone()) whatever data you need to perform the async code in get_data_async, so that nothing is borrowed from self.

[H36615]

Thanks I'll check that out asap when I have time.

[H36615]

Sorry I don't quite follow. You mean I should clone e.g. self.controller or something inside get_data_async? What could the line 57 look like for example?

[yusdacra]

I'm not sure how your get_async_data function looks, but you have some data that is borrowed, some stuff you borrow from controller, so you can try cloning them. The get_data_async function would then look something like this:

fn get_data_async(&self) -> impl std::future::Future<Output = output> + 'static {
  // clone data you will use in your logic
  async move {
    // your logic
  }
}