How to avoid “Entities passed to the choice field must be managed. Maybe persist them in the entity manager?”

Question

1. Generated Entities from existing database
2. Generated CRUD controller

But it does not work with exception message:

Entit

Answer 1

In my case I was having this issue because I was using EntityType instead of ChoiceType, to build the selectList.

EntityType display only data from database, instead ChoiceType can display "not managed" objects.

I hope this will help.