diff --git a/examples/sqlx-mysql/src/operation.rs b/examples/sqlx-mysql/src/operation.rs
index 2eb95607..d7a5ed78 100644
--- a/examples/sqlx-mysql/src/operation.rs
+++ b/examples/sqlx-mysql/src/operation.rs
@@ -20,12 +20,12 @@ pub async fn insert_and_update(db: &DbConn) -> Result<(), ExecErr> {
         name: Set("pear".to_owned()),
         ..Default::default()
     };
-    let res = Fruit::insert(pear).exec(db).await?;
+    let res: InsertResult = Fruit::insert(pear).exec(db).await?;
 
     println!();
-    println!("Inserted: {:?}\n", res);
+    println!("Inserted: last_insert_id = {}\n", res.last_insert_id);
 
-    let pear = Fruit::find_by_id(res.last_insert_id)
+    let pear: Option<fruit::Model> = Fruit::find_by_id(res.last_insert_id)
         .one(db)
         .await
         .map_err(|_| ExecErr)?;
@@ -36,10 +36,10 @@ pub async fn insert_and_update(db: &DbConn) -> Result<(), ExecErr> {
     let mut pear: fruit::ActiveModel = pear.unwrap().into();
     pear.name = Set("Sweet pear".to_owned());
 
-    let res = Fruit::update(pear).exec(db).await?;
+    let pear: fruit::ActiveModel = Fruit::update(pear).exec(db).await?;
 
     println!();
-    println!("Updated: {:?}\n", res);
+    println!("Updated: {:?}\n", pear);
 
     Ok(())
 }
diff --git a/examples/sqlx-mysql/src/select.rs b/examples/sqlx-mysql/src/select.rs
index 825efdab..6057671e 100644
--- a/examples/sqlx-mysql/src/select.rs
+++ b/examples/sqlx-mysql/src/select.rs
@@ -44,7 +44,7 @@ pub async fn all_about_select(db: &DbConn) -> Result<(), QueryErr> {
 async fn find_all(db: &DbConn) -> Result<(), QueryErr> {
     print!("find all cakes: ");
 
-    let cakes = Cake::find().all(db).await?;
+    let cakes: Vec<cake::Model> = Cake::find().all(db).await?;
 
     println!();
     for cc in cakes.iter() {
@@ -105,7 +105,7 @@ async fn find_one(db: &DbConn) -> Result<(), QueryErr> {
 
     print!("find models belong to: ");
 
-    let fruits = cheese.find_fruit().all(db).await?;
+    let fruits = cheese.find_related(Fruit).all(db).await?;
 
     println!();
     for ff in fruits.iter() {
@@ -144,7 +144,7 @@ async fn count_fruits_by_cake(db: &DbConn) -> Result<(), QueryErr> {
 async fn find_many_to_many(db: &DbConn) -> Result<(), QueryErr> {
     print!("find cakes and fillings: ");
 
-    let both = Cake::find()
+    let both: Vec<(cake::Model, Vec<filling::Model>)> = Cake::find()
         .left_join_and_select_with(Filling)
         .all(db)
         .await?;
diff --git a/src/lib.rs b/src/lib.rs
index 89b83a4d..273479d1 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -3,6 +3,7 @@ mod driver;
 pub mod entity;
 mod executor;
 pub mod query;
+#[doc(hidden)]
 pub mod tests_cfg;
 mod util;