[ZODB-Dev] Referential integrity

[Greg Ward]

On 01 March 2002, Steve Alexander said:
> 1: Try to write your programs to respect referential integrity, and run 
> Greg Ward's Oscar every night to catch problems.

It's called "Grouch" now, BTW.

Also, Grouch currently doesn't recognize constraints like "notnone" in
its type language.  (I believe the type-checker will enforce those
constraints, but the only way to get them into the schema is through
Python code.  You can't put them in your docstrings... yet.)

Oh, a fourth idea: add a __getstate__() method that doesn't actually get
an object's state, but makes sure that the object is sane.  That way you
catch problems at pickle-time.  The problem is what to do with the
problem; AFAIK exceptions in __{get,set}state__() are thrown away.
You'd probably want a special "database integrity violation" log, with
alarm bells going off if it is ever written to.

        Greg
-- 
Greg Ward - software developer                gward@mems-exchange.org
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