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Nicolas Wavrant
ZODB
Commits
824dc122
Commit
824dc122
authored
Mar 12, 2004
by
Tim Peters
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Checkpoint.
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357cc30d
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src/ZODB/tests/testmvcc.py
src/ZODB/tests/testmvcc.py
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src/ZODB/tests/testmvcc.py
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824dc122
...
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@@ -195,11 +195,12 @@ First get the database back in an initial state.
>>> r1["b"].value
0
>>> cn1.sync()
>>> r1["b"]._p_state
>>> cn1.sync()
# cn2 modified 'b', so cn1 should get a ghost for b
>>> r1["b"]._p_state
# -1 means GHOST
-1
Closing the connection and commit a transaction should have the same effect.
Closing the connection, committing a transaction, and aborting a transaction,
should all have the same effect on non-current objects in cache.
>>> def testit():
... cn1.sync()
...
...
@@ -211,6 +212,10 @@ Closing the connection and commit a transaction should have the same effect.
... cn2.getTransaction().commit()
>>> testit()
>>> r1["b"]._p_state # 0 means UPTODATE, although note it's an older revision
0
>>> r1["b"].value
0
>>> r1["a"].value = 1
>>> cn1.getTransaction().commit()
>>> r1["b"]._p_state
...
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@@ -225,20 +230,20 @@ reused by the next open() call (along with its object cache).
>>> cn3 = db.open()
>>> cn1 is cn3
True
>>> cn1 = cn3
>>> r1 = cn1.root()
It's not just that every object is a ghost. The root was in the
cache, so our first reference to it doesn't return a ghost.
Although "b" is a ghost in cn1 at this point (because closing a connection
has the same effect on non-current objects in the connection's cache as
committing a transaction), not every object is a ghost. The root was in
the cache and was current, so our first reference to it doesn't return
a ghost.
>>> r1._p_state
>>> r1._p_state
# UPTODATE
0
>>> r1["b"]._p_state
>>> r1["b"]._p_state
# GHOST
-1
>>> cn1._transaction = None
(See the Cleanup section below.)
>>> cn1._transaction = None # See the Cleanup section below
Late invalidation
-----------------
...
...
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