Afshin, There is no "don't care key", only keys that sort before or after than the items you are interested in.
I could explain this more clearly if you had a specific example. B. On Thu, Jul 1, 2010 at 10:00 PM, afshin afzali <[email protected]> wrote: > Hi Robert, > > You mean if I want to be able to use a don't care key for example for any of > my arrays, I should insert a fixed constant element in all of them ? > > -- afshin > > On Fri, Jul 2, 2010 at 1:19 AM, Robert Newson <[email protected]>wrote: > >> Afshin, >> >> Unfortunately, none of your four assumptions are correct. >> >> CouchDB supports key and key range lookup only, there is no syntax for >> "match all arrays" or "match all objects". >> >> What you have probably seen is this trick; >> >> ?startkey=["foo"]&endkey=["foo",{}] >> >> which, in most circumstances, selects all array keys where the first >> item is a string of "foo". This works because shorter arrays sort >> before longer arrays and {} (empty object) sorts later than any >> possible string. >> >> As Zachary pointed out above, the view collation is described at >> http://wiki.apache.org/couchdb/View_collation. >> >> B. >> >> On Thu, Jul 1, 2010 at 9:30 PM, Zachary Zolton <[email protected]> >> wrote: >> > Afshin, >> > >> > Well, if you want to just get a certain "slice" of a view's key space, >> > you'll want to use both the startkey and endkey parameters. >> > >> > For instance, if you just want all the view rows where the key >> > contains an array, try this: >> > >> > startkey=[]&endkey={} >> > >> > Any array value (e.g. ["foo"] or ["foo","bar"]) will collate at or >> > after the empty array (i.e. []), and since in this example you don't >> > want any object keys coming through we stop at the empty object (i.e. >> > {}). >> > >> > Is this any clearer? >> > >> > -Zach >> > >> > On Thu, Jul 1, 2010 at 3:04 PM, afshin afzali <[email protected]> >> wrote: >> >> Thank you, I've saw this page already. My question is based on that >> page. >> >> Are you confirm my assumtions ? >> >> >> >> >> >> >> >> >> >> On Fri, Jul 2, 2010 at 12:26 AM, Zachary Zolton < >> [email protected]>wrote: >> >> >> >>> Here's the overall ordering of collation: >> >>> http://wiki.apache.org/couchdb/View_collation#Collation_Specification >> >>> >> >>> On Thu, Jul 1, 2010 at 2:31 PM, afshin afzali <[email protected]> >> >>> wrote: >> >>> > Hi Guys, >> >>> > >> >>> > These are some simple assumptions which I would be confirmed when >> using >> >>> in >> >>> > startkey param: >> >>> > >> >>> > 1) {} matches all object keys ( including {} ) >> >>> > 2) [] matches all array keys (including [] ) >> >>> > 3) "" (null string) matches all string keys (including "") >> >>> > 4) {} at the end of complex key matches all of remained ones >> >>> > >> >>> > BEST >> >>> > -- afshin >> >>> > >> >>> >> >> >> > >> >
