Rust 没有得到无法返回引用局部变量`queues`的值返回引用当前函数拥有的数据的值的重复逻辑

我有以下 struct :

use std::sync::Mutex;

pub struct Message {
    id: String,
    content: String,
    last_read: Option<String>,
    uuid: String,
}

impl Message {
    pub fn get_uuid(&self) -> String {
        self.uuid.to_owned()
    }
}

pub struct Queue {
    queue: Vec<Message>, // the actual queue
    read_timeout: u32,   // the amount of time a message is hidden from consumers
    size: u32,           // should always be the same as queue.len()
    uuid: String,
}

pub struct AppState {
    pub queues: Mutex<Vec<Queue>>,
}

最后，我有一些处理数据的函数.他们有重复的逻辑，正如你在下面看到的.他们在得到queue英镑后做的事情不同，但检索队列的方式是相同的.

pub async fn add_message(
    data: AppState
) {
    let queue_uuid = &String::from("my uuid");
    
    let queue_mutex = data.queues.lock();
    let mut queues = match queue_mutex {
        Ok(q) => q,
        Err(_) => return,
    };
    // find matching queue 
    let queue = queues.iter_mut().find(|q| q.uuid == *queue_uuid);
}

pub async fn get_message(
    data: AppState
) {
    let queue_uuid = &String::from("my uuid");
    
    let queue_mutex = data.queues.lock();
    let mut queues = match queue_mutex {
        Ok(q) => q,
        Err(_) => return,
    };
    // find matching queue 
    let queue = queues.iter_mut().find(|q| q.uuid == *queue_uuid);
    // once the queue is found, do some stuff with it 
}

我想要推翻这一逻辑.

impl AppState {
    pub fn get_queues(&self) -> &Mutex<Vec<Queue>> {
        &self.queues
    }

    pub fn get_queue_by_id(&mut self, uuid: String) -> Result<&mut Queue, String> {
        let queue_mutex = self.queues.lock();
        let mut queues = match queue_mutex {
            Ok(q) => q,
            Err(_) => return Err(String::from("Whoops! Something went wrong")),
        };
        match queues.iter_mut().find(|q| q.uuid == uuid) {
            None => Err(format!("Could not find queue with uuid {}", uuid)),
            Some(q) => Ok(q),
        }
    }
}

然而，这将产生一个错误，因为我不能返回q，因为它将在函数返回时被删除.对此有什么好的解决方案吗？

附注:我知道这样做可能会更有效率--例如，使用散列映射而不是向量来存储当前队列.我是一个铁 rust 新手，打算对此进行大量重构，所以任何反馈都是有帮助的！谢谢!