It would be nice to be able to select
issues by attributes that the 
issues
do not have. E.G.

 list issues that do not have the 
word hardware in them

or 

 list issues that do not have 
the status dead.

Granted the last can be done by crafting 
a
request that includes all other possibilities,
but multi-
element selections aren't available
on the current web 
interface.


-- rouilj

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Implicitly matching empty strings is also desired. 

I'm working on a way to pass 'class:property' pairs as keys to the
'ignore' parameter of indexer.search[1], so the user can exclude some
properties from 'All text' searches.

While it's not exactly about "non-matching criteria in filters", it
makes me think that this RFE is implementable in
templating.HTMLRequest.[batch|_post_init] (as opposed to building
support for negative filterspecs in classes).

I'll give this a try soon :)

[1] http://psf.upfronthosting.co.za/roundup/meta/issue262