Not easily. There's no built-in way to access the abstract syntax tree (or equivalent) of a function at run time. The best thing you can do is to obtain the source code of a function using `.toString()` and then use a separate JS parser to process it, but that's not a very realistic option.

There is a limited form of such "expression rewriting" using tagged template strings introduced in ES2015. But it wouldn't be particularly useful for the ORM case.