gistfile1.txt

loic84: ping jarshwah_
11:09 jarshwah_: pong loic84
11:10 jarshwah_: I'm around for about 20 minutes then away for an hour or two
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11:13 loic84: jarshwah_: cool that's plenty enough ;)
11:14 loic84: jarshwah_: what's the current status of expression for filter/exclude?
11:15 jarshwah_: as in the combining of Expressions and Lookups?
11:16 jarshwah_: I haven't done anything with it since my POC patch
11:16 jarshwah_: I've had ideas, but haven't got the chance to sit down and do it
11:16 loic84: is there a ticket?
11:16 jarshwah_: https://github.com/django/django/pull/4482
11:16 jarshwah_: https://code.djangoproject.com/ticket/24629
11:17 loic84: cool, some background: https://gist.github.com/loic/6f451a411f7186994709
11:17 jarshwah_: what is .key() ?
11:17 loic84: a lookup for JSONField
11:18 jarshwah_: yup I suspected
11:18 jarshwah_: I don't mind the syntax, but it's departing_from_how_django_normally__works :P
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11:19 loic84: hehe yes, but it supports things we__cant__currently__support :P
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11:19 jarshwah_: yeah I've been thinking about how we might support more expressive syntaxes
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11:20 loic84: like .substr(10, 20), or .key(42) or key('é')
11:20 jarshwah_: F('data').key() would be difficult to make work though
11:20 loic84: you mean the sugar?
11:20 jarshwah_: F() doesn't have a type until it's executed
11:20 jarshwah_: yeah the sugar
11:21 loic84: yeah, I have a bare bone implementation already for this
11:21 loic84: similar to select_related
11:21 loic84: we just collect info, then validate when the query is executed
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11:22 loic84: I updated the gist with some pseudocode for the sugar
11:25 jarshwah_: yeah I figured it must be some getattr magic
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11:26 jarshwah_: basically, we need to make Lookups and Transforms some kind of Expression subclass
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11:27 jarshwah_: and add a register_transform alongside register_lookup
11:27 jarshwah_: still not sure how to proceed wrt the whole self.lhs and self.rhs and maintain backwards compat
11:27 jarshwah_: also the process_{l,r}hs methods
11:28 jarshwah_: perhaps they could be called from resolve_expression
11:28 jarshwah_: and self.lhs can be a property that backs onto get/set_source_expressions
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11:29 jarshwah_: I've not had a lot of spare time lately for hacking away unfortunately, but I'm hopeful to get it done for 1.9 if no one else beats me to it
11:29 loic84: we gonna sprint on it, but no guarantee obviously ;)
11:29 jarshwah_: excellent, absolve me! haha
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11:30 jarshwah_: well ^ those are my notes pretty much
11:30 jarshwah_: the POC with Func.transformer was hacky, and I wouldn't progress that way further I think
11:31 jarshwah_: gotta run, good luck.. and I'm usually floating around so ping me if needed and I'll respond when I can
11:31 jarshwah_: when are the sprints?
11:32 loic84: now ;)
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11:43 loic84: mjtamlyn: got a PR for as_transform?
11:43 mjtamlyn: commenting on jarshwah_'s commit now
11:45 loic84: cool, if you've got a linkable diff for your branch share it, I'm collecting all the bits and pieces we have.
11:46 mjtamlyn: loic84: https://github.com/django/django/pull/4748