Don't try to execute DDL in a transactional context.

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This commit is contained in:
Friedrich Lindenberg 2014-02-12 13:52:59 +01:00
parent 7f881b440b
commit a797e90357
1 changed files with 5 additions and 5 deletions
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10
dataset/persistence/database.py
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@ -66,10 +66,7 @@ class Database(object):
@property @property
def op(self): def op(self):
if hasattr(self.local, 'connection'): ctx = MigrationContext.configure(self.engine)
ctx = MigrationContext.configure(self.local.connection)
else:
ctx = MigrationContext.configure(self.engine)
return Operations(ctx) return Operations(ctx)
def _acquire(self): def _acquire(self):
@ -89,7 +86,10 @@ class Database(object):
def begin(self): def begin(self):
""" Enter a transaction explicitly. No data will be written """ Enter a transaction explicitly. No data will be written
until the transaction has been committed. """ until the transaction has been committed.
**NOTICE:** Schema modification operations, such as the creation
of tables or columns will not be part of the transactional context."""
if not hasattr(self.local, 'connection'): if not hasattr(self.local, 'connection'):
self.local.connection = self.engine.connect() self.local.connection = self.engine.connect()
if not hasattr(self.local, 'tx'): if not hasattr(self.local, 'tx'):