On 03/10/2015 10:23 AM, Mike Bayer wrote:
if*that’s* what you mean, that’s known as a “polymorphic foreign key”, and
it is not actually a foreign key at all, it is a terrible antipattern started by
the PHP/Rails community and carried forth by projects like Django.
A) Heh. it is much, much older than that. SQL Database have been around
for long enough for these antipatterns to be discovered and rediscovered
by multiple generations. I'm aware of the mean by which we cn mitigate
them.
But that is not what we are doing here. These are no "parity" issues
even. It is distributed data.
User sand Groups are in, not just one LDAP server, but many. With
Federation, the users will not even be in a system we can enumerate.
Which is good, we should never have been allowing "list users" in the
first place.
What the Assignments table is doing is pulling together the User and
groups from remote systems together with role defintions and project
definitions in the local database. The data is not in one database. It
is in Many.
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