Fix examples

Author: gahag-cw

postgres/examples/custom_state.rs

@@ -4,6 +4,7 @@ use std::str::FromStr;
 
 use bb8::{CustomizeConnection, Pool};
 use bb8_postgres::PostgresConnectionManager;
+use futures_util::future::BoxFuture;
 use tokio_postgres::config::Config;
 use tokio_postgres::tls::{MakeTlsConnect, TlsConnect};
 use tokio_postgres::{Client, Error, Socket, Statement};
@@ -43,14 +44,23 @@ async fn main() {
 struct Customizer;
 
 impl CustomizeConnection<CustomPostgresConnection, Error> for Customizer {
-    async fn on_acquire(&self, conn: &mut CustomPostgresConnection) -> Result<(), Error> {
-        conn.custom_state
-            .insert(QueryName::BasicSelect, conn.prepare("SELECT 1").await?);
-
-        conn.custom_state
-            .insert(QueryName::Addition, conn.prepare("SELECT 1 + 1 + 1").await?);
-
-        Ok(())
+    fn on_acquire<'a, 'b, 'r>(
+        &'a self,
+        conn: &'b mut CustomPostgresConnection,
+    ) -> BoxFuture<'r, Result<(), Error>>
+    where
+        'a: 'r,
+        'b: 'r,
+    {
+        Box::pin(async {
+            conn.custom_state
+                .insert(QueryName::BasicSelect, conn.prepare("SELECT 1").await?);
+
+            conn.custom_state
+                .insert(QueryName::Addition, conn.prepare("SELECT 1 + 1 + 1").await?);
+
+            Ok(())
+        })
     }
 }