SeaQL/sea-orm 1.1.6

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assert_eq!(
    Entity::insert_many([
        ActiveModel { id: NotSet, name: Set("two".into()) },
        ActiveModel { id: NotSet, name: Set("three".into()) },
    ])
    .exec_with_returning_many(db)
    .await
    .unwrap(),
    [
        Model { id: 2, name: "two".into() },
        Model { id: 3, name: "three".into() },
    ]
);

assert_eq!(
    cakes_bakers::Entity::insert_many([
        cakes_bakers::ActiveModel {
            cake_id: Set(1),
            baker_id: Set(2),
        },
        cakes_bakers::ActiveModel {
            cake_id: Set(2),
            baker_id: Set(1),
        },
    ])
    .exec_with_returning_keys(db)
    .await
    .unwrap(),
    [(1, 2), (2, 1)]
);