>>> connection = engine.connect()
Using the connection to execute a select statement:
>>> result = connection.execute('select name from locations')
>>> result.rowcount
10
>>> result.first()
(u'Algol',)
Using the ORM to query the locations:
>>> locations = session.query(Location)
>>> [l.name for l in locations][:5]
[u'Algol', u'Folfanga', u'Aldebaran', u'Argabuthon', u'Bartledan']
With limit and offset:
>>> locations = session.query(Location).offset(1).limit(4)
>>> [l.name for l in locations]
[u'Folfanga', u'Aldebaran', u'Argabuthon', u'Bartledan']
With filter:
>>> location = session.query(Location).filter_by(name='Algol').one()
>>> location.name
u'Algol'
Order by:
>>> locations = session.query(Location).order_by(sa.desc(Location.name))
>>> locations = locations.limit(2)
>>> [l.name for l in locations]
[u'Outer Eastern Rim', u'North West Ripple']
Insert a new location:
>>> location = Location()
>>> location.name = 'Earth'
>>> location.kind = 'Planet'
>>> session.add(location)
>>> session.flush()
Currently refresh option is missing, therefore sleep for now:
>>> from time import sleep
>>> sleep(1)
Inserted location is available:
>>> location = session.query(Location).filter_by(name='Earth').one()
>>> location.name
u'Earth'