why do selectField* require Handler ?

[Simon Michael]

Good day all!

This is a long shot, but in case anyone can advise:

I'm wondering how to add a selectFieldList here:
https://github.com/simonmichael/hledger/commit/cfc05540daad75a358a47741c16e7611fe42f54f#diff-4f785631673350333a037eca53769f9320f8b8a2856371597ef0687f52f86849R72-R124

And I'm curious why selectField* has to run in the Handler (HandlerFor
site), unlike other field types ?

https://hackage.haskell.org/package/yesod-form-1.7.0/docs/Yesod-Form.html#v:selectFieldList

Thanks for Yesod! I have been relearning it to fix
https://github.com/simonmichael/hledger/issues/1229 . The types are
intense. I can see how much work they are doing and the amazing value
they are providing. I do find them pretty hard to untangle when you go
off the beaten path..