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
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
|
from sqlalchemy.ext import serializer
from sqlalchemy import exc
import sqlalchemy as sa
from sqlalchemy import testing
from sqlalchemy import MetaData, Integer, String, ForeignKey, select, \
desc, func, util
from sqlalchemy.testing.schema import Table
from sqlalchemy.testing.schema import Column
from sqlalchemy.orm import relationship, sessionmaker, scoped_session, \
class_mapper, mapper, joinedload, configure_mappers, aliased
from sqlalchemy.testing import eq_
from sqlalchemy.testing import fixtures
class User(fixtures.ComparableEntity):
pass
class Address(fixtures.ComparableEntity):
pass
class SerializeTest(fixtures.MappedTest):
run_setup_mappers = 'once'
run_inserts = 'once'
run_deletes = None
@classmethod
def define_tables(cls, metadata):
global users, addresses
users = Table('users', metadata, Column('id', Integer,
primary_key=True), Column('name', String(50)))
addresses = Table('addresses', metadata, Column('id', Integer,
primary_key=True), Column('email',
String(50)), Column('user_id', Integer,
ForeignKey('users.id')))
@classmethod
def setup_mappers(cls):
global Session
Session = scoped_session(sessionmaker())
mapper(User, users, properties={'addresses'
: relationship(Address, backref='user',
order_by=addresses.c.id)})
mapper(Address, addresses)
configure_mappers()
@classmethod
def insert_data(cls):
params = [dict(zip(('id', 'name'), column_values))
for column_values in [(7, 'jack'), (8, 'ed'), (9,
'fred'), (10, 'chuck')]]
users.insert().execute(params)
addresses.insert().execute([dict(zip(('id', 'user_id', 'email'
), column_values))
for column_values in [(1, 7,
'jack@bean.com'), (2, 8,
'ed@wood.com'), (3, 8,
'ed@bettyboop.com'), (4, 8,
'ed@lala.com'), (5, 9,
'fred@fred.com')]])
def test_tables(self):
assert serializer.loads(serializer.dumps(users, -1),
users.metadata, Session) is users
def test_columns(self):
assert serializer.loads(serializer.dumps(users.c.name, -1),
users.metadata, Session) is users.c.name
def test_mapper(self):
user_mapper = class_mapper(User)
assert serializer.loads(serializer.dumps(user_mapper, -1),
None, None) is user_mapper
def test_attribute(self):
assert serializer.loads(serializer.dumps(User.name, -1), None,
None) is User.name
@testing.requires.python26 # crashes in 2.5
def test_expression(self):
expr = \
select([users]).select_from(users.join(addresses)).limit(5)
re_expr = serializer.loads(serializer.dumps(expr, -1),
users.metadata, None)
eq_(str(expr), str(re_expr))
assert re_expr.bind is testing.db
eq_(re_expr.execute().fetchall(), [(7, u'jack'), (8, u'ed'),
(8, u'ed'), (8, u'ed'), (9, u'fred')])
@testing.requires.python26 # namedtuple workaround not serializable in 2.5
@testing.skip_if(lambda: util.pypy, "pickle sometimes has "
"problems here, sometimes not")
def test_query(self):
q = Session.query(User).filter(User.name == 'ed'
).options(joinedload(User.addresses))
eq_(q.all(), [User(name='ed', addresses=[Address(id=2),
Address(id=3), Address(id=4)])])
q2 = serializer.loads(serializer.dumps(q, -1), users.metadata,
Session)
def go():
eq_(q2.all(), [User(name='ed', addresses=[Address(id=2),
Address(id=3), Address(id=4)])])
self.assert_sql_count(testing.db, go, 1)
eq_(q2.join(User.addresses).filter(Address.email
== 'ed@bettyboop.com').value(func.count('*')), 1)
u1 = Session.query(User).get(8)
q = Session.query(Address).filter(Address.user
== u1).order_by(desc(Address.email))
q2 = serializer.loads(serializer.dumps(q, -1), users.metadata,
Session)
eq_(q2.all(), [Address(email='ed@wood.com'),
Address(email='ed@lala.com'),
Address(email='ed@bettyboop.com')])
# unfortunately pickle just doesn't have the horsepower
# to pickle annotated joins, both cpickle and pickle
# get confused likely since identity-unequal/hash equal
# objects with cycles being used
#q = \
# Session.query(User).join(User.addresses).\
# filter(Address.email.like('%fred%'))
#q2 = serializer.loads(serializer.dumps(q, -1), users.metadata,
# Session)
#eq_(q2.all(), [User(name='fred')])
#eq_(list(q2.values(User.id, User.name)), [(9, u'fred')])
@testing.requires.python26 # namedtuple workaround not serializable in 2.5
@testing.exclude('sqlite', '<=', (3, 5, 9),
'id comparison failing on the buildbot')
def test_aliases(self):
u7, u8, u9, u10 = Session.query(User).order_by(User.id).all()
ualias = aliased(User)
q = Session.query(User, ualias).join(ualias, User.id
< ualias.id).filter(User.id < 9).order_by(User.id,
ualias.id)
eq_(list(q.all()), [(u7, u8), (u7, u9), (u7, u10), (u8, u9),
(u8, u10)])
q2 = serializer.loads(serializer.dumps(q, -1), users.metadata,
Session)
eq_(list(q2.all()), [(u7, u8), (u7, u9), (u7, u10), (u8, u9),
(u8, u10)])
@testing.skip_if(lambda: util.pypy, "pickle sometimes has "
"problems here, sometimes not")
def test_any(self):
r = User.addresses.any(Address.email == 'x')
ser = serializer.dumps(r, -1)
x = serializer.loads(ser, users.metadata)
eq_(str(r), str(x))
if __name__ == '__main__':
testing.main()
|
