Exam answer issue

[lmmrssa]

After creating exam with single choice, long text then multi choice
It disabled submit at last question (multi choice) then moving back to old question does not show previous answer

[paulbert]

@lmmrssa This is two separate issues, I think. Initializing the question with the previously filled in answer hasn't ever worked, but we should make sure exams of different configurations are able to be finished first.

[paulbert]

Error is below. My guess is that when switching questions this.answer isn't reset from the markdown. Tested with the other three question types before the multiple answer and they all worked.

[nadaa]

Also I got this error when submitting:

[nadaa]

@paulbert, I have checked this, it's a binding issue in markdown, it's only one-way. Any suggestion how to solve this?

[paulbert]

@nadaa I think this will actually be fixed in #2667. It's not a binding error. We use two way binding on the markdown component in a more verbose format. See https://angular.io/guide/template-syntax#inside-ngmodel for an example, but I'll try to explain here, too:

The simple

[(...)]="variable"

can be written as

[...]="variable" (...Changes)="function"

when you need to do more than just update the value of the variable when it changes.

[paulbert]

Update above: #2667 only fixes showing the previous answer. Does not fix long text -> multiple answer breaking issue.

[paulbert]

2nd update: #2667 now fixes this as well.