How to handle nullable column type in postgres?

[kdwidi]

Hi, i am currently working on postgres database with nullable column type. In postgres, you can not use foo = NULL expression but foo IS NULL. As far as i read the sea-query documentation i can only use Expr::col(TableIden::Foo).eq(option_variable) as equality comparison expression and if option_variable value is None, it produce foo = NULL. Is there any possible way to handle binary expression for nullable column type without manual checking?