NSPredicateEditorRowTemplate for date comparison
- by Dave DeLong
I'm building an NSPredicateEditor, and I want the ability to do advanced date comparison.
I realize that I can build an NSPredicateEditorRowTemplate with a rightExpressionType of NSDateAttributeType, but the predicates I want to build need to be much more advanced than that.
For example, I need to basic comparison like:
dateKeypath < aDate
dateKeypath <= aDate
dateKeypath = aDate
dateKeypath != aDate
dateKeypath > aDate
dateKeypath >= aDate
These basic comparisons are quite easy to achieve, and I have these working. However, I also need to do comparisons like:
dateKeypath isInTheLast n days (or weeks, months, years)
dateKeypath isNotInTheLast n days (or weeks, months, years)
dateKeypath between aDate and anotherDate
How can I achieve these sorts of comparisons? I understand that I'll need to create a custom NSPredicateEditorRowTemplate, but I haven't found any clear documentation on how to achieve something like this.
EDIT
Bonus points are available for also knowing how to make these comparisons a full date-time (year-month-day-hour-minute-second) comparison (as NSDateAttributeType only has year-month-day granularity).
