1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
|
import testenv; testenv.configure_for_tests()
from sqlalchemy import *
from sqlalchemy.orm import *
from testlib import *
NUM = 500
DIVISOR = 50
meta = MetaData(testing.db)
items = Table('items', meta,
Column('item_id', Integer, primary_key=True),
Column('value', String(100)))
subitems = Table('subitems', meta,
Column('sub_id', Integer, primary_key=True),
Column('parent_id', Integer, ForeignKey('items.item_id')),
Column('value', String(100)))
class Item(object):pass
class SubItem(object):pass
mapper(Item, items, properties={'subs':relation(SubItem, lazy=False)})
mapper(SubItem, subitems)
def load():
global l
l = []
for x in range(1,NUM/DIVISOR + 1):
l.append({'item_id':x, 'value':'this is item #%d' % x})
#print l
items.insert().execute(*l)
for x in range(1, NUM/DIVISOR + 1):
l = []
for y in range(1, DIVISOR + 1):
z = ((x-1) * DIVISOR) + y
l.append({'sub_id':z,'value':'this is item #%d' % z, 'parent_id':x})
#print l
subitems.insert().execute(*l)
@profiling.profiled('masseagerload', always=True, sort=['cumulative'])
def masseagerload(session):
query = session.query(Item)
l = query.all()
print "loaded ", len(l), " items each with ", len(l[0].subs), "subitems"
def all():
meta.create_all()
try:
load()
masseagerload(create_session())
finally:
meta.drop_all()
if __name__ == '__main__':
all()
|
