ConnectionHub

This object serves as a hub for connections, so that you can pass in a ConnectionHub to a SQLObject subclass as though it was a connection, but actually bind a real database connection later. You can also bind connections on a per-thread basis.

You must hang onto the original ConnectionHub instance, as you cannot retrieve it again from the class or instance.

To use the hub, do something like:

hub = ConnectionHub()
class MyClass(SQLObject):
    _connection = hub

hub.threadConnection = connectionFromURI('...')

Attributes

a threadConnection

<property object>

Methods

f __format__(...) ...

default object formatter

f __subclasshook__(...) ...

Abstract classes can override this to customize issubclass().

This is invoked early on by abc.ABCMeta.__subclasscheck__(). It should return True, False or NotImplemented. If it returns NotImplemented, the normal algorithm is used. Otherwise, it overrides the normal algorithm (and the outcome is cached).

f __sizeof__(...) ...

__sizeof__() -> int size of object in memory, in bytes

f __init__(self) ...

f __get__(self, obj, type=None) ...

f __set__(self, obj, value) ...

f getConnection(self) ...

f doInTransaction(self, func, *args, **kw) ...

This routine can be used to run a function in a transaction, rolling the transaction back if any exception is raised from that function, and committing otherwise.

Use like:

sqlhub.doInTransaction(process_request, os.environ)

This will run process_request(os.environ). The return value will be preserved.

See the source for more information.