Chris Anderson wrote:
I would avoid using a reduce at all in this case, and just request the
key-range corresponding to the particular user directly from the map.
OK, but just to be clear, the data set I want to display would be
something like
User 1 -- Dates: 11/02/2003, 12/02/2004, 1/02/2005
User 2 -- Dates: 3/12/2004, 10/02/2005, 1/02/2006
User 3 -- Dates: 4/12/2003, 6/02/2006, 1/02/2006
etc...
You wouldn't advise me to make multiple calls to the same view for each
user would you? Once to get list of all users, then once for every user?
I was thinking that maybe in this case I should be using a reduce
function. What would you advise?
jr
You'll get all the information you need, and little extraneous
information. You can then munge the data into whatever shape you need
in your application. However, I bet you won't need to do much munging.
"all": {
"map": "function(doc) { emit(doc.User, doc.Date); }"
}
}
Reduce should be reserved for when you want to aggregate a scalar
value from a set of map rows. Eg, the number of messages a user
received in a given month, or some such. When you merely want all the
data from a map, about a given key, just query the map.
Chris
