Tickets :: Comment on [#14067] selecting from a large number of to-dos

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Comment	> This concerns Nag and especially its Nag_Api. > > Retrieving tasks via getTasks() involves fetching all to-dos of a > tasklist from the backend and sieving through the results. The only > parameter for effectively restricting the search is the completed > flag. There is no support for $start and $end parameters. Over the > years a user's to-do list may accumulate a large number (thousands) > of entries so that fetching to-dos from the backend will be an > unnecessarily expensive operation. This may be relevant for > displaying a user's "current status" that includes uncompleted to-dos > as well as completed to-dos from the past week or so. > > As retrieving a to-do may involve calculating recurrences, a simple > parametrisation of the backend driver for $start and $end dates may > not suffice. I suggest using an archive() function that marks a to-do > as historic if it is marked as completed and there are no more > recurrences in the future. This way all to-dos are kept in the > tasklist and synchronising is not affected. > > The archive() function could be called automatically on any change > operation to a to-do, with a selectable threshold of age (e.g. all > to-dos with a due-date in the past and a completed-date more than 4 > weeks ago is marked as historical). > > getTasks() should support a corresponding parameter indicating if a > search is to be made on live or archived to-dos. > > > >
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