On Mar 1, 2014, at 11:24 PM, archit agarwal <[email protected]> wrote:
> Now I am confused about how to implement the reduce function so I get
> messages in which => either from is X OR to is X
> Any help on this would be really appreciated.
That's not the job of a reduce function. Reducing is like aggregation in SQL --
"SUM()", "MAX()", "AVERAGE()", etc.
What you're asking for in this query is a sub-range: "messages with X" for some
X. So what you want is a map function that emits keys that are ordered by the
other person's identity, so you can then query for a specific person.
What I'd do is
if([to isEqualToString:myuid])
emit(@[from,timestamp],nil);
else if([from isEqualToString:myuid])
emit(@[to,timestamp],nil);
Then query by
query.startKey = @[other];
query.endKey = @[other, @{}];
--Jens
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