Re: [SQLObject] Cache Lock Problems

[Ian B. <ia...@co...>]

Okay, I see the problem:


    def testPurge1(self):
        x = CacheSet()
        y = Something()
        obj = x.get(1, y.__class__)
        self.assertEqual(obj, None)
        x.put(1, y.__class__, y)
        j = x.get(1, y.__class__)
        self.assertEqual(j, y)
        x.purge(1, y.__class__)
        j = x.get(1, y.__class__)
        print "Got %r" % j

So when you do that last .get, you've locked the cache and you don't do
a put to unlock it.  So that's an error in how you're using
CacheSet/CacheFactory.

I've changed it slightly so that you can use try:finally: to protect
against this, which SQLObject instances now do.  I suspect some error
was happening during instantiation of some object, and that's what was
causing the bug.

  Ian