Hi.

Here is my form ProductType and this is how I use it in action.

I expect it to render available categories in choice list, but it renders text field for category, I read the doc, and this article, and tried the same, but all I get is a text field for category.

It renders available categories in choice list only if I remove getDefaultOptions() from ProductType and explicitly pass Product as a second parameter to $this->createForm(), but I guess that is not the right way to do it.