How do you retrieve the last month's entries from core data

Question

how do I ask core data to fetch me the last 30 elements entered or alternatively the elements entered within a month of today?

score 1 · Accepted Answer · edited May 23 '17 at 12:12

1

To fetch a certain number of records, use qualification like [fetchRequest setFetchLimit:30] in combination with NSPredicate instance you desired.

To retrieve elements within a range of time, you need first calculate the beginning and the end NSDate instances of the period you want, then code your predicate instance like:

NSPredicate *predicate = [NSPredicate predicateWithFormat:
            @"(date >= %@) AND (date <= %@)", startDate, endDate];

See this and this.

edited May 23 '17 at 12:12

Community

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answered Jan 29 '12 at 16:35

ZhangChn

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Thanks I'll probably use the second option but wouldn't the [fetchRequest setFetchLimit:30] retrieve the first 30 and not the last 30? – Ayrad Jan 29 '12 at 16:41
ok I can probably sort in descending order and then do the setFetchLimit – Ayrad Jan 29 '12 at 16:46
Yeah. Just as you've figured out. – ZhangChn Jan 29 '12 at 16:52

How do you retrieve the last month's entries from core data

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