How do I alter and use this method?

[rustnoob12]

This is what I am trying to figure out how to use:
https://docs.rs/bb8/0.7.0/bb8/struct.Builder.html#method.connection_customizer

Here's some code I was working on but I'm not sure if I'm way off:

#[derive(Debug)]
struct ConnectionCustomizer {}
impl bb8_postgres::bb8::CustomizeConnection<PooledConnection<'_,PostgresConnectionManager<MakeTlsConnector>>, anyhow::Error>
for ConnectionCustomizer
{
    fn on_acquire(&self, connection: &mut PooledConnection<PostgresConnectionManager<MakeTlsConnector>>) -> Result<(), anyhow::Error> {
        println!("test");
        Ok(())
    }
}

and I would use it like:

.connection_customizer(Box::new(ConnectionCustomizer {}))

[alice]

You'll need to use the async_trait crate to have it match the definition of the CustomizeConnection trait.

[rustnoob12]

I originally tried that but I am just lost to the syntax here. Could you show me an example?

I greatly appreciate your quick response.

[alice]

Something like this:

#[async_trait]
impl
    bb8_postgres::bb8::CustomizeConnection<
        PooledConnection<'_, PostgresConnectionManager<MakeTlsConnector>>,
        anyhow::Error,
    > for ConnectionCustomizer
{
    async fn on_acquire(
        &self,
        connection: &mut PooledConnection<PostgresConnectionManager<MakeTlsConnector>>,
    ) -> Result<(), anyhow::Error> {
        println!("test");
        Ok(())
    }
}

[rustnoob12]

I just keep getting a lifetime specifier error related to PooledConnection<'_, PostgresConnectionManager>

I couldn't figure out if that is supposed to that that bb8 type or if it wanted the actual tokio_postgres Connection type.

[alice]

Try this

#[async_trait]
impl<'a>
    bb8_postgres::bb8::CustomizeConnection<
        PooledConnection<'a, PostgresConnectionManager<MakeTlsConnector>>,
        anyhow::Error,
    > for ConnectionCustomizer
{
    async fn on_acquire(
        &self,
        connection: &mut PooledConnection<'a, PostgresConnectionManager<MakeTlsConnector>>,
    ) -> Result<(), anyhow::Error> {
        println!("test");
        Ok(())
    }
}

[rustnoob12]

error[E0478]: lifetime bound not satisfied
  --> src/lib/once.rs:63:1
   |
63 | / bb8_postgres::bb8::CustomizeConnection<
64 | |     PooledConnection<'a, PostgresConnectionManager<MakeTlsConnector>>,
65 | |     anyhow::Error,
66 | | > for ConnectionCustomizer
   | |_^
   |
note: lifetime parameter instantiated with the lifetime `'a` as defined on the impl at 62:6
  --> src/lib/once.rs:62:6
   |
62 | impl<'a>
   |      ^^
   = note: but lifetime parameter must outlive the static lifetime

[alice]

Sounds like you're using the wrong type. I would probably open an issue on the github repo and ask there.

[rustnoob12]

Thanks, will do