In the “Become a Rapid Developer” module 4.8.2 I had to assign an attribute to “TrainingEvent_NewEdit”. Because only the attributes of the entity and not the associated entities were displayed, I had to manually assign the attributes of the associated entities to a drop-down element. However, when doing so, the entities were shown, but no attributes. Only after creating a totally new attribute in the associated entity (such as “course”), all attributes appeared out of nowhere. I had to repeat this process and at the end deleted the new attributes to move on. Did I miss something? The list view and drop down are correctly assigned to the “TrainingEvent” entity.
Several people have faced this issue. My suggestion would be to provide this feedback when you finish the module so that Mendix team is aware of this problem.
Although, I personally did not face this issue when I did try.