Re: Getting information on updated n:m relationship
Re: Getting information on updated n:m relationship
- Subject: Re: Getting information on updated n:m relationship
- From: Guido Neitzer <email@hidden>
- Date: Fri, 9 Mar 2007 11:20:56 -0700
On 09.03.2007, at 11:09, Chuck Hill wrote:
Day two without coffee. I am not sure what you are after here.
Are you looking to know when they are added / removed within a
single EOF stack? Or when the relationships cached in memory get
out of sync with what is in the db (some other process updated the
db)? Or something else?
Oh, wow - are you on deprivation?
What we are trying to do is getting something like an audit trail for
that relationship. Situation:
Assume you have entity A and entity B which are joined in a simple
n:m relationship which is flattened for convenience (simple join
table, no additional stuff in there). So, when someone adds or
deletes one of those relationships we get a notification while
listening for "editingContextDidSaveChanges" but we get that on e.g.
entity A. We don't get the information WHAT was changed.
So, we are looking for the most convenient way to track those changes
to say "user XY has removed object a from category b on date z" and
so on. And we would like to have something at a level where the
relationship is actually handled, not at the page doing that (that
would be the quick and dirty hack).
cug
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