Summary:
Ref T7803. Ordering and paging are inherently intertwined, but they often aren't driven by the same data right now.
Start driving them through the same data:
- `getOrderableColumns()` defines orderable and pageable columns.
- `getPagingValueMap()` reads values from a cursor.
This is generally sufficient to implement both paging and ordering.
Also, add some more sanity checks to try to curtail the number of ambiguous/invalid orderings applications produce, since these cause subtle/messy bugs.
Test Plan:
- Paged through pastes and a few other object types.
- Intentionally changed defaults to be invalid and hit some of the errors.
Reviewers: btrahan
Reviewed By: btrahan
Subscribers: epriestley
Maniphest Tasks: T7803
Differential Revision: https://secure.phabricator.com/D12355
Summary:
Ref T7803. Queries currently have a single `getPagingColumn()`, which is oversimplified and insufficient to describe many ordering operations. Frequently, orders must span multiple columns.
Move toward an "order vector", which is a list of orderable values like "name, id". These map directly to columns, and are sufficient to actually describe orders. The more modern Query classes (Maniphest, Repository) essentially do this manually anyway.
Test Plan:
- Added and executed unit tests.
- Browsed around, verified the correct ORDER BY clauses were generated.
Reviewers: btrahan
Reviewed By: btrahan
Subscribers: epriestley
Maniphest Tasks: T7803
Differential Revision: https://secure.phabricator.com/D12352
