Get function name, module and arity from function capture

[derek-zhou]

@stjefim

So to answer your question - I agree I just need to store these 3 pieces in the DB, however, how to obtain them from a function capture.

I don’t think there is a general solution as function can be anonymous. Also, storing function in a db may not be the best idea. Code will change, db record last for a long time. Also, think of the security implication.