Courses Admin Controller - Read and auth

[chrxr]

API endpoint for CRUD operations on courses, for courses admin interface.

It is expected that we will need a controller for each interface. Therefore it is not expected that this controller will be used anywhere expect in the courses admin interface.

Question: Is there a built-in technique for providing all CRUD operations easily? https://docs.nestjs.com/recipes/crud

• [x] Read

• [x] Authentication

• [x] Authorization

• [x] Docs

• [x] Tests

[rmainwork]

As discussed with @natalynyu and @jonseitz we won't be using https://docs.nestjs.com/recipes/crud. This is for the following reasons:

1. No way to specify response DTOs means that the the controller actions would just be returning raw model instances, rather than a formatted set of that data, like we're doing elsewhere(This would also waste the effort put into #102 by @natalynyu).
2. The crud package requires you to write a NestJS service using the data-mapper pattern and to inherit from their base service. This is necessary because the @crud decorator requires a service to be provided that is compatible with their base service(active record entity classes are NOT compatible with this)

[rmainwork]

I've edited @chrxr's comment slightly above to add "Auth" to the checkboxes because I'm assuming that we don't want any logged in user to be able to access this controller?

[chrxr]

Currently on hold as app authentication for dev is being reviewed. @rmainseas to open new ticket for dev authentication and include ref in this ticket.

[rmainwork]

Ticket opened #134 for authentication refactoring.