Ep 196 - nested model form pt 1. :reject_if => lambda prevents validation?

[chiperific]

To replicate:

1. Create a new Survey.
2. Title the Survey.
3. Leave Question1 blank
4. Enter text in Question1 > Answer1
5. Submit form.

Survey is created without Question1. Answer1 text is lost.

I want survey to throw error on submit noting that Qestion1 can't be blank. Any ideas?