Store the current request in CursorPagination

[c-w]

Background: Both PageNumberPagination and LimitOffsetPagination store the current request inside of the paginate_queryset method (here and here respectively) into the self.request variable. CursorPagination doesn't do this.

Proposal: I suggest a change to store the current request into the self.request variable also for CursorPagination; I'm happy to open a pull request if the proposal is accepted.

Rationale: Having access to self.request inside of the pagination classes is useful as it makes the classes easier to extend: when overriding methods we (for example) can access all the query parameters, etc. Additionally, making the access to self.request consistent across all three built-in pagination types makes it easier to swap around the classes while keeping any custom overridden code the same.

[lovelydinosaur]

Sure.
The consistency argument is good enough here.

[c-w]

Ok, thank you. I opened a PR: #8764.