pub struct TypedColumn {
    pub id: NumericColumn<Entity>,
    pub name: StringColumn<Entity>,
    pub price: NumericColumn<Entity>,
}

impl Entity {
    pub const COLUMN: TypedColumn = TypedColumn {
        id: NumericColumn(Column::Id),
        name: StringColumn(Column::Name),
        price: NumericColumn(Column::Price),
    };
}

// before
let cakes = cake::Entity::find()
    .filter(cake::Column::Name.like("Ch%"))
    .all(db)
    .await?;

// after
let cakes = Cake::find()
    .filter(Cake::COLUMN.name.like("Ch%"))
    .all(db)
    .await?;

Cake::find()
    .filter(Cake::COLUMN.id.like("Ch")) // method cannot be called on `NumericColumn<Entity>`
    .filter(Cake::COLUMN.name.like(2))  // the trait `From<{integer}>` is not implemented for `String`
    .order_by_desc(Cake::COLUMN.name)
    .one(db)
    .await?