Hi All,
I've produced an ugly bunch of ruby that talks to OpenDirectory and am trying
to clean it up a bit. Currently I'm using pure ruby classes that proxy Obj-C
objects held in instance variables, but my goal is to have something structured
like this -
module OpenDirectory
class Node < ODNode
def find_user_by_name name
...
end
end
end
but I can't work out how to make a Ruby class that subclasses an Obj-C class
and overrides the initialiser. With classes that descend from Obj-C classes the
ruby "initialize" method doesn't seem to get called (because they're missing
descent from the Ruby base Object class?), and all my attempts to override init
result in
2010-05-05 15:55:34.237 macruby[2600:903] object 0x200249900 with 0
retain-count passed to CFMakeCollectable.
and a segfault.
Attached below is a reduced case, if anyone can point out how to get a valid
MyNode object it'd be much appreciated. If node is a real ODNode (as in the
commented lines) all works correctly. I'm not calling super, since the object
has (I believe) already been alloc'd and I'm explicitly calling the designated
initializer later in my own init. If I *do* call super in my own init, I just
get an additional "object 0x... with 0 retain-count passed to
CFMakeCollectable" error. If I use ODNode.nodeWithSession:name:error: in my own
init the example below works, but I end up with an ODNode rather than a MyNode
so it's missing any methods I'm adding to my own class.
(I'm also unsure whether I need to be retaining the session in an instance
variable myself or if it's also being retained in the ODNode, but that's
another question.)
Any pointers very much appreciated...
Russell
example:
framework 'OpenDirectory'
# no BridgeSupport for CFOpenDirectory.framework... :(
Users = "dsRecTypeStandard:Users"
RecordName = "dsAttrTypeStandard:RecordName"
MatchEqualTo = 0x2001
RealName = "dsAttrTypeStandard:RealName"
# some account name to search for
me = "russm"
class MyNode < ODNode
def init
@session = ODSession.defaultSession
STDERR.puts "===== pre CFMakeCollectable error"
self.initWithSession @session, name:"/Local/Default", error:nil
STDERR.puts "===== post CFMakeCollectable error"
self
end
end
node = MyNode.new
#session = ODSession.defaultSession
#node = ODNode.nodeWithSession session, name:"/Local/Default", error:nil
query = ODQuery.queryWithNode node,
forRecordTypes: Users,
attribute: RecordName,
matchType: MatchEqualTo,
queryValues: me,
returnAttributes: RealName,
maximumResults:0,
error:nil
STDERR.puts "===== pre segfault"
results = query.resultsAllowingPartial false, error:nil
STDERR.puts "===== post segfault"
result_attributes = results[0].recordDetailsForAttributes nil, error:nil
puts result_attributes.inspect
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