Thanks, I'll look at this when I get a chance.
Ian
On Jul 29, 2008, at 9:41 AM, LukasGiessmann wrote:
i forgot to attach the patch to the mail - so other users - if they
have
the same problem - will be able to compare the current source with our
patch.
regards
lukas
hi,
while we were working on the problem "associations between
instances of
the same class" we also were trying to solve the remove-association
problem.
we have a suggestion - it differs a little from the original way, but
maybe it is helpful.
so i sent a patch today.
regards
lukas
I was getting too much spam so require authentication on the Trac
now. The admins can be slow to grant accounts or enable Trac. If
you
send me a report directly on e-mail I'll add it for you.
Ian
On Jul 9, 2008, at 3:55 PM, LukasGiessmann wrote:
Hi Ian,
I know this is not the right space to place this question butI don
´t
know
were else I should do it.
Tried to get an account for http://trac.common-lisp.net/elephant; I
wrote
a mail to [EMAIL PROTECTED] but haven´t got an answer yet.
Is there another possibility to mark this bug?
Best regards
Lukas
I haven't looked at that code in a bit, but I suspect that the
right
thing happens if you just remove the association definition from
defclass and reevaluate the defclass form. Can you mark this as a
bug
in elephant so I can remember to look into it later?
Thank you,
Ian
On Jul 4, 2008, at 4:24 AM, LukasGiessmann wrote:
hello,
since our last mail working with associations turned out to go
quite
well
but one more problem came up:
i tried to change the associations by removing it and replacing
it
by a
new association. but the function "remove-association" only works
partially.
1. in this one-to-one association the function doesn't work at
all.
---
(defpclass job()
((title :initarg :title :accessor title-of :index t)
(company :initarg :company :accessor company-of :index t)
(job-holder :initarg :job-holder :accessor job-holder-
of :associate
person)))
(defpclass person()
((name :initarg :name :accessor name-of :index t)
(job :initarg :job :accessor job-of :associate job)))
---
an error message shows up:
(remove-association *job1* 'job-holder *person1*) ; -> There is
no
applicable method for the generic function #<STANDARD-GENERIC-
FUNCTION
ELEPHANT::OID (1)> when called with arguments (NIL).
same thing happens when i use the following statement:
(setf (job-holder-of *job1*) nil)
2. by one-to-many associations generally nothing happens at all.
---
(defpclass job()
((title :initarg :title :accessor title-of :index t)
(company :initarg :company :accessor company-of :index t)
(job-holders :accessor job-holders-of :associate (person job))))
(defpclass person()
((name :initarg :name :accessor name-of :index t)
(job :initarg :job :accessor job-of :associate job)))
---
it only works in this case:
---
(drop-instance *person2*)
(remove-association *job2* 'job-holders *person2*)
---
3. in the case of many-to-many associations everything goes fine.
how do i get the "remove-association" function to work?
are there other ways for changing associations?
thank you for your help
lukas
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