Description

What?

Modules can be configured a chapter as model answer. The chapters visibility is controlled through a RevealRule.

Why?

Chapters may include prujus to previous modules, especially in O1.

How?

Adds model answer and reveal rule fields to CourseModule. A Chapter can check (by reversing the relation) if it is a model solution to a module. Any LearningObject can check if it is a child of this kind of Chapter. Adds a key 'is_revealed' to every LearningObject entry in cache. Updates exercise permission class to check LearningObject's visibility. Adds new reveal state that takes all module's exercises into account.

Fixes #1098

Testing

Remember to add or update unit tests for new features and changes.

How to test your changes in A-plus
How to test accessibility

What type of test did you run?

[ ] Accessibility test using the WAVE extension.
[x] Django unit tests.
[x] Selenium tests.
[ ] Other test. (Add a description below)
[x] Manual testing.

Made chapter 2.0 module 1's model answer. Added deadline deviation to module 1 for student so that module 1 and 2 are open simultaneously. Made sure chapter 2.0 is not visible to student, not through toc, results or direct link.

Did you test the changes in

[x] Chrome
[x] Firefox
[ ] This pull request cannot be tested in the browser.

Think of what is affected by these changes and could become broken

Translation

[x] Did you modify or add new strings in the user interface? (Read about how to create translation)

Programming style

[x] Did you follow our style guides?
[x] Did you use Python type hinting in all functions that you added or edited? (type hints for function parameters and return values)

Have you updated the README or other relevant documentation?

[ ] documents inside the doc directory.
[ ] README.md.
[ ] Aplus Manual.
[ ] Other documentation (mention below which documentation).

Is it Done?

[ ] Reviewer has finished the code review
[ ] After the review, the developer has made changes accordingly
[ ] Customer/Teacher has accepted the implementation of the feature

Clean up your git commit history before submitting the pull request!

apluslms / a-plus