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7d96ad4d535dc02a8ab1384df1db94dea2a045b5
sqlalchemy/test/orm/test_unitofworkv2.py
T
Mike Bayer 80aeba3d5e - Added a new type-level modifier :meth:.TypeEngine.evaluates_none 
which indicates to the ORM that a positive set of None should be
persisted as the value NULL, instead of omitting the column from
the INSERT statement.  This feature is used both as part of the
implementation for 🎫`3514` as well as a standalone feature
available on any type.  fixes #3250
- add new documentation section illustrating the "how to force null"
 use case of #3250
- alter our change from #3514 so that the class-level flag is now
called "should_evaluate_none"; so that "evaluates_none" is now
a generative method.
2015-09-19 16:27:51 -04:00

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from sqlalchemy.testing import eq_, assert_raises_message
from sqlalchemy import testing
from sqlalchemy.testing import engines
from sqlalchemy.testing.schema import Table, Column
from test.orm import _fixtures
from sqlalchemy import exc, util
from sqlalchemy.testing import fixtures, config
from sqlalchemy import Integer, String, ForeignKey, func, literal
from sqlalchemy.orm import mapper, relationship, backref, \
create_session, unitofwork, attributes,\
Session, exc as orm_exc
from sqlalchemy.testing.mock import Mock, patch
from sqlalchemy.testing.assertsql import AllOf, CompiledSQL
from sqlalchemy import event
class AssertsUOW(object):
def _get_test_uow(self, session):
uow = unitofwork.UOWTransaction(session)
deleted = set(session._deleted)
new = set(session._new)
dirty = set(session._dirty_states).difference(deleted)
for s in new.union(dirty):
uow.register_object(s)
for d in deleted:
uow.register_object(d, isdelete=True)
return uow
def _assert_uow_size(self, session, expected):
uow = self._get_test_uow(session)
postsort_actions = uow._generate_actions()
print(postsort_actions)
eq_(len(postsort_actions), expected, postsort_actions)
class UOWTest(
_fixtures.FixtureTest,
testing.AssertsExecutionResults, AssertsUOW):
run_inserts = None
class RudimentaryFlushTest(UOWTest):
def test_one_to_many_save(self):
users, Address, addresses, User = (self.tables.users,
self.classes.Address,
self.tables.addresses,
self.classes.User)
mapper(User, users, properties={
'addresses': relationship(Address),
})
mapper(Address, addresses)
sess = create_session()
a1, a2 = Address(email_address='a1'), Address(email_address='a2')
u1 = User(name='u1', addresses=[a1, a2])
sess.add(u1)
self.assert_sql_execution(
testing.db,
sess.flush,
CompiledSQL(
"INSERT INTO users (name) VALUES (:name)",
{'name': 'u1'}
),
CompiledSQL(
"INSERT INTO addresses (user_id, email_address) "
"VALUES (:user_id, :email_address)",
lambda ctx: {'email_address': 'a1', 'user_id': u1.id}
),
CompiledSQL(
"INSERT INTO addresses (user_id, email_address) "
"VALUES (:user_id, :email_address)",
lambda ctx: {'email_address': 'a2', 'user_id': u1.id}
),
)
def test_one_to_many_delete_all(self):
users, Address, addresses, User = (self.tables.users,
self.classes.Address,
self.tables.addresses,
self.classes.User)
mapper(User, users, properties={
'addresses': relationship(Address),
})
mapper(Address, addresses)
sess = create_session()
a1, a2 = Address(email_address='a1'), Address(email_address='a2')
u1 = User(name='u1', addresses=[a1, a2])
sess.add(u1)
sess.flush()
sess.delete(u1)
sess.delete(a1)
sess.delete(a2)
self.assert_sql_execution(
testing.db,
sess.flush,
CompiledSQL(
"DELETE FROM addresses WHERE addresses.id = :id",
[{'id': a1.id}, {'id': a2.id}]
),
CompiledSQL(
"DELETE FROM users WHERE users.id = :id",
{'id': u1.id}
),
)
def test_one_to_many_delete_parent(self):
users, Address, addresses, User = (self.tables.users,
self.classes.Address,
self.tables.addresses,
self.classes.User)
mapper(User, users, properties={
'addresses': relationship(Address),
})
mapper(Address, addresses)
sess = create_session()
a1, a2 = Address(email_address='a1'), Address(email_address='a2')
u1 = User(name='u1', addresses=[a1, a2])
sess.add(u1)
sess.flush()
sess.delete(u1)
self.assert_sql_execution(
testing.db,
sess.flush,
CompiledSQL(
"UPDATE addresses SET user_id=:user_id WHERE "
"addresses.id = :addresses_id",
lambda ctx: [
{'addresses_id': a1.id, 'user_id': None},
{'addresses_id': a2.id, 'user_id': None}
]
),
CompiledSQL(
"DELETE FROM users WHERE users.id = :id",
{'id': u1.id}
),
)
def test_many_to_one_save(self):
users, Address, addresses, User = (self.tables.users,
self.classes.Address,
self.tables.addresses,
self.classes.User)
mapper(User, users)
mapper(Address, addresses, properties={
'user': relationship(User)
})
sess = create_session()
u1 = User(name='u1')
a1, a2 = Address(email_address='a1', user=u1), \
Address(email_address='a2', user=u1)
sess.add_all([a1, a2])
self.assert_sql_execution(
testing.db,
sess.flush,
CompiledSQL(
"INSERT INTO users (name) VALUES (:name)",
{'name': 'u1'}
),
CompiledSQL(
"INSERT INTO addresses (user_id, email_address) "
"VALUES (:user_id, :email_address)",
lambda ctx: {'email_address': 'a1', 'user_id': u1.id}
),
CompiledSQL(
"INSERT INTO addresses (user_id, email_address) "
"VALUES (:user_id, :email_address)",
lambda ctx: {'email_address': 'a2', 'user_id': u1.id}
),
)
def test_many_to_one_delete_all(self):
users, Address, addresses, User = (self.tables.users,
self.classes.Address,
self.tables.addresses,
self.classes.User)
mapper(User, users)
mapper(Address, addresses, properties={
'user': relationship(User)
})
sess = create_session()
u1 = User(name='u1')
a1, a2 = Address(email_address='a1', user=u1), \
Address(email_address='a2', user=u1)
sess.add_all([a1, a2])
sess.flush()
sess.delete(u1)
sess.delete(a1)
sess.delete(a2)
self.assert_sql_execution(
testing.db,
sess.flush,
CompiledSQL(
"DELETE FROM addresses WHERE addresses.id = :id",
[{'id': a1.id}, {'id': a2.id}]
),
CompiledSQL(
"DELETE FROM users WHERE users.id = :id",
{'id': u1.id}
),
)
def test_many_to_one_delete_target(self):
users, Address, addresses, User = (self.tables.users,
self.classes.Address,
self.tables.addresses,
self.classes.User)
mapper(User, users)
mapper(Address, addresses, properties={
'user': relationship(User)
})
sess = create_session()
u1 = User(name='u1')
a1, a2 = Address(email_address='a1', user=u1), \
Address(email_address='a2', user=u1)
sess.add_all([a1, a2])
sess.flush()
sess.delete(u1)
a1.user = a2.user = None
self.assert_sql_execution(
testing.db,
sess.flush,
CompiledSQL(
"UPDATE addresses SET user_id=:user_id WHERE "
"addresses.id = :addresses_id",
lambda ctx: [
{'addresses_id': a1.id, 'user_id': None},
{'addresses_id': a2.id, 'user_id': None}
]
),
CompiledSQL(
"DELETE FROM users WHERE users.id = :id",
{'id': u1.id}
),
)
def test_many_to_one_delete_unloaded(self):
users, Address, addresses, User = (self.tables.users,
self.classes.Address,
self.tables.addresses,
self.classes.User)
mapper(User, users)
mapper(Address, addresses, properties={
'parent': relationship(User)
})
parent = User(name='p1')
c1, c2 = Address(email_address='c1', parent=parent), \
Address(email_address='c2', parent=parent)
session = Session()
session.add_all([c1, c2])
session.add(parent)
session.flush()
pid = parent.id
c1id = c1.id
c2id = c2.id
session.expire(parent)
session.expire(c1)
session.expire(c2)
session.delete(c1)
session.delete(c2)
session.delete(parent)
# testing that relationships
# are loaded even if all ids/references are
# expired
self.assert_sql_execution(
testing.db,
session.flush,
AllOf(
# [ticket:2002] - ensure the m2os are loaded.
# the selects here are in fact unexpiring
# each row - the m2o comes from the identity map.
# the User row might be handled before or the addresses
# are loaded so need to use AllOf
CompiledSQL(
"SELECT addresses.id AS addresses_id, "
"addresses.user_id AS "
"addresses_user_id, addresses.email_address AS "
"addresses_email_address FROM addresses "
"WHERE addresses.id = "
":param_1",
lambda ctx: {'param_1': c1id}
),
CompiledSQL(
"SELECT addresses.id AS addresses_id, "
"addresses.user_id AS "
"addresses_user_id, addresses.email_address AS "
"addresses_email_address FROM addresses "
"WHERE addresses.id = "
":param_1",
lambda ctx: {'param_1': c2id}
),
CompiledSQL(
"SELECT users.id AS users_id, users.name AS users_name "
"FROM users WHERE users.id = :param_1",
lambda ctx: {'param_1': pid}
),
CompiledSQL(
"DELETE FROM addresses WHERE addresses.id = :id",
lambda ctx: [{'id': c1id}, {'id': c2id}]
),
CompiledSQL(
"DELETE FROM users WHERE users.id = :id",
lambda ctx: {'id': pid}
),
),
)
def test_many_to_one_delete_childonly_unloaded(self):
users, Address, addresses, User = (self.tables.users,
self.classes.Address,
self.tables.addresses,
self.classes.User)
mapper(User, users)
mapper(Address, addresses, properties={
'parent': relationship(User)
})
parent = User(name='p1')
c1, c2 = Address(email_address='c1', parent=parent), \
Address(email_address='c2', parent=parent)
session = Session()
session.add_all([c1, c2])
session.add(parent)
session.flush()
#pid = parent.id
c1id = c1.id
c2id = c2.id
session.expire(c1)
session.expire(c2)
session.delete(c1)
session.delete(c2)
self.assert_sql_execution(
testing.db,
session.flush,
AllOf(
# [ticket:2049] - we aren't deleting User,
# relationship is simple m2o, no SELECT should be emitted for
# it.
CompiledSQL(
"SELECT addresses.id AS addresses_id, "
"addresses.user_id AS "
"addresses_user_id, addresses.email_address AS "
"addresses_email_address FROM addresses "
"WHERE addresses.id = "
":param_1",
lambda ctx: {'param_1': c1id}
),
CompiledSQL(
"SELECT addresses.id AS addresses_id, "
"addresses.user_id AS "
"addresses_user_id, addresses.email_address AS "
"addresses_email_address FROM addresses "
"WHERE addresses.id = "
":param_1",
lambda ctx: {'param_1': c2id}
),
),
CompiledSQL(
"DELETE FROM addresses WHERE addresses.id = :id",
lambda ctx: [{'id': c1id}, {'id': c2id}]
),
)
def test_many_to_one_delete_childonly_unloaded_expired(self):
users, Address, addresses, User = (self.tables.users,
self.classes.Address,
self.tables.addresses,
self.classes.User)
mapper(User, users)
mapper(Address, addresses, properties={
'parent': relationship(User)
})
parent = User(name='p1')
c1, c2 = Address(email_address='c1', parent=parent), \
Address(email_address='c2', parent=parent)
session = Session()
session.add_all([c1, c2])
session.add(parent)
session.flush()
#pid = parent.id
c1id = c1.id
c2id = c2.id
session.expire(parent)
session.expire(c1)
session.expire(c2)
session.delete(c1)
session.delete(c2)
self.assert_sql_execution(
testing.db,
session.flush,
AllOf(
# the parent User is expired, so it gets loaded here.
CompiledSQL(
"SELECT addresses.id AS addresses_id, "
"addresses.user_id AS "
"addresses_user_id, addresses.email_address AS "
"addresses_email_address FROM addresses "
"WHERE addresses.id = "
":param_1",
lambda ctx: {'param_1': c1id}
),
CompiledSQL(
"SELECT addresses.id AS addresses_id, "
"addresses.user_id AS "
"addresses_user_id, addresses.email_address AS "
"addresses_email_address FROM addresses "
"WHERE addresses.id = "
":param_1",
lambda ctx: {'param_1': c2id}
),
),
CompiledSQL(
"DELETE FROM addresses WHERE addresses.id = :id",
lambda ctx: [{'id': c1id}, {'id': c2id}]
),
)
def test_natural_ordering(self):
"""test that unconnected items take relationship()
into account regardless."""
users, Address, addresses, User = (self.tables.users,
self.classes.Address,
self.tables.addresses,
self.classes.User)
mapper(User, users)
mapper(Address, addresses, properties={
'parent': relationship(User)
})
sess = create_session()
u1 = User(id=1, name='u1')
a1 = Address(id=1, user_id=1, email_address='a2')
sess.add_all([u1, a1])
self.assert_sql_execution(
testing.db,
sess.flush,
CompiledSQL(
"INSERT INTO users (id, name) VALUES (:id, :name)",
{'id': 1, 'name': 'u1'}),
CompiledSQL(
"INSERT INTO addresses (id, user_id, email_address) "
"VALUES (:id, :user_id, :email_address)",
{'email_address': 'a2', 'user_id': 1, 'id': 1}
)
)
sess.delete(u1)
sess.delete(a1)
self.assert_sql_execution(
testing.db,
sess.flush,
CompiledSQL(
"DELETE FROM addresses WHERE addresses.id = :id",
[{'id': 1}]
),
CompiledSQL(
"DELETE FROM users WHERE users.id = :id",
[{'id': 1}]
)
)
def test_natural_selfref(self):
"""test that unconnected items take relationship()
into account regardless."""
Node, nodes = self.classes.Node, self.tables.nodes
mapper(Node, nodes, properties={
'children': relationship(Node)
})
sess = create_session()
n1 = Node(id=1)
n2 = Node(id=2, parent_id=1)
n3 = Node(id=3, parent_id=2)
# insert order is determined from add order since they
# are the same class
sess.add_all([n1, n2, n3])
self.assert_sql_execution(
testing.db,
sess.flush,
CompiledSQL(
"INSERT INTO nodes (id, parent_id, data) VALUES "
"(:id, :parent_id, :data)",
[{'parent_id': None, 'data': None, 'id': 1},
{'parent_id': 1, 'data': None, 'id': 2},
{'parent_id': 2, 'data': None, 'id': 3}]
),
)
def test_many_to_many(self):
keywords, items, item_keywords, Keyword, Item = (
self.tables.keywords, self.tables.items, self.tables.item_keywords,
self.classes.Keyword, self.classes.Item)
mapper(Item, items, properties={
'keywords': relationship(Keyword, secondary=item_keywords)
})
mapper(Keyword, keywords)
sess = create_session()
k1 = Keyword(name='k1')
i1 = Item(description='i1', keywords=[k1])
sess.add(i1)
self.assert_sql_execution(
testing.db,
sess.flush,
AllOf(
CompiledSQL(
"INSERT INTO keywords (name) VALUES (:name)",
{'name': 'k1'}
),
CompiledSQL(
"INSERT INTO items (description) VALUES (:description)",
{'description': 'i1'}
),
),
CompiledSQL(
"INSERT INTO item_keywords (item_id, keyword_id) "
"VALUES (:item_id, :keyword_id)",
lambda ctx: {'item_id': i1.id, 'keyword_id': k1.id}
)
)
# test that keywords collection isn't loaded
sess.expire(i1, ['keywords'])
i1.description = 'i2'
self.assert_sql_execution(
testing.db,
sess.flush,
CompiledSQL("UPDATE items SET description=:description "
"WHERE items.id = :items_id",
lambda ctx: {'description': 'i2', 'items_id': i1.id})
)
def test_m2o_flush_size(self):
users, Address, addresses, User = (self.tables.users,
self.classes.Address,
self.tables.addresses,
self.classes.User)
mapper(User, users)
mapper(Address, addresses, properties={
'user': relationship(User, passive_updates=True)
})
sess = create_session()
u1 = User(name='ed')
sess.add(u1)
self._assert_uow_size(sess, 2)
def test_o2m_flush_size(self):
users, Address, addresses, User = (self.tables.users,
self.classes.Address,
self.tables.addresses,
self.classes.User)
mapper(User, users, properties={
'addresses': relationship(Address),
})
mapper(Address, addresses)
sess = create_session()
u1 = User(name='ed')
sess.add(u1)
self._assert_uow_size(sess, 2)
sess.flush()
u1.name = 'jack'
self._assert_uow_size(sess, 2)
sess.flush()
a1 = Address(email_address='foo')
sess.add(a1)
sess.flush()
u1.addresses.append(a1)
self._assert_uow_size(sess, 6)
sess.flush()
sess = create_session()
u1 = sess.query(User).first()
u1.name = 'ed'
self._assert_uow_size(sess, 2)
u1.addresses
self._assert_uow_size(sess, 6)
class SingleCycleTest(UOWTest):
def teardown(self):
engines.testing_reaper.rollback_all()
# mysql can't handle delete from nodes
# since it doesn't deal with the FKs correctly,
# so wipe out the parent_id first
testing.db.execute(
self.tables.nodes.update().values(parent_id=None)
)
super(SingleCycleTest, self).teardown()
def test_one_to_many_save(self):
Node, nodes = self.classes.Node, self.tables.nodes
mapper(Node, nodes, properties={
'children': relationship(Node)
})
sess = create_session()
n2, n3 = Node(data='n2'), Node(data='n3')
n1 = Node(data='n1', children=[n2, n3])
sess.add(n1)
self.assert_sql_execution(
testing.db,
sess.flush,
CompiledSQL(
"INSERT INTO nodes (parent_id, data) VALUES "
"(:parent_id, :data)",
{'parent_id': None, 'data': 'n1'}
),
AllOf(
CompiledSQL(
"INSERT INTO nodes (parent_id, data) VALUES "
"(:parent_id, :data)",
lambda ctx: {'parent_id': n1.id, 'data': 'n2'}
),
CompiledSQL(
"INSERT INTO nodes (parent_id, data) VALUES "
"(:parent_id, :data)",
lambda ctx: {'parent_id': n1.id, 'data': 'n3'}
),
)
)
def test_one_to_many_delete_all(self):
Node, nodes = self.classes.Node, self.tables.nodes
mapper(Node, nodes, properties={
'children': relationship(Node)
})
sess = create_session()
n2, n3 = Node(data='n2', children=[]), Node(data='n3', children=[])
n1 = Node(data='n1', children=[n2, n3])
sess.add(n1)
sess.flush()
sess.delete(n1)
sess.delete(n2)
sess.delete(n3)
self.assert_sql_execution(
testing.db,
sess.flush,
CompiledSQL("DELETE FROM nodes WHERE nodes.id = :id",
lambda ctx: [{'id': n2.id}, {'id': n3.id}]),
CompiledSQL("DELETE FROM nodes WHERE nodes.id = :id",
lambda ctx: {'id': n1.id})
)
def test_one_to_many_delete_parent(self):
Node, nodes = self.classes.Node, self.tables.nodes
mapper(Node, nodes, properties={
'children': relationship(Node)
})
sess = create_session()
n2, n3 = Node(data='n2', children=[]), Node(data='n3', children=[])
n1 = Node(data='n1', children=[n2, n3])
sess.add(n1)
sess.flush()
sess.delete(n1)
self.assert_sql_execution(
testing.db, sess.flush, AllOf(
CompiledSQL(
"UPDATE nodes SET parent_id=:parent_id "
"WHERE nodes.id = :nodes_id", lambda ctx: [
{'nodes_id': n3.id, 'parent_id': None},
{'nodes_id': n2.id, 'parent_id': None}
]
)
),
CompiledSQL(
"DELETE FROM nodes WHERE nodes.id = :id", lambda ctx: {
'id': n1.id}))
def test_many_to_one_save(self):
Node, nodes = self.classes.Node, self.tables.nodes
mapper(Node, nodes, properties={
'parent': relationship(Node, remote_side=nodes.c.id)
})
sess = create_session()
n1 = Node(data='n1')
n2, n3 = Node(data='n2', parent=n1), Node(data='n3', parent=n1)
sess.add_all([n2, n3])
self.assert_sql_execution(
testing.db,
sess.flush,
CompiledSQL(
"INSERT INTO nodes (parent_id, data) VALUES "
"(:parent_id, :data)",
{'parent_id': None, 'data': 'n1'}
),
AllOf(
CompiledSQL(
"INSERT INTO nodes (parent_id, data) VALUES "
"(:parent_id, :data)",
lambda ctx: {'parent_id': n1.id, 'data': 'n2'}
),
CompiledSQL(
"INSERT INTO nodes (parent_id, data) VALUES "
"(:parent_id, :data)",
lambda ctx: {'parent_id': n1.id, 'data': 'n3'}
),
)
)
def test_many_to_one_delete_all(self):
Node, nodes = self.classes.Node, self.tables.nodes
mapper(Node, nodes, properties={
'parent': relationship(Node, remote_side=nodes.c.id)
})
sess = create_session()
n1 = Node(data='n1')
n2, n3 = Node(data='n2', parent=n1), Node(data='n3', parent=n1)
sess.add_all([n2, n3])
sess.flush()
sess.delete(n1)
sess.delete(n2)
sess.delete(n3)
self.assert_sql_execution(
testing.db,
sess.flush,
CompiledSQL("DELETE FROM nodes WHERE nodes.id = :id",
lambda ctx: [{'id': n2.id}, {'id': n3.id}]),
CompiledSQL("DELETE FROM nodes WHERE nodes.id = :id",
lambda ctx: {'id': n1.id})
)
def test_many_to_one_set_null_unloaded(self):
Node, nodes = self.classes.Node, self.tables.nodes
mapper(Node, nodes, properties={
'parent': relationship(Node, remote_side=nodes.c.id)
})
sess = create_session()
n1 = Node(data='n1')
n2 = Node(data='n2', parent=n1)
sess.add_all([n1, n2])
sess.flush()
sess.close()
n2 = sess.query(Node).filter_by(data='n2').one()
n2.parent = None
self.assert_sql_execution(
testing.db,
sess.flush,
CompiledSQL(
"UPDATE nodes SET parent_id=:parent_id WHERE "
"nodes.id = :nodes_id",
lambda ctx: {"parent_id": None, "nodes_id": n2.id}
)
)
def test_cycle_rowswitch(self):
Node, nodes = self.classes.Node, self.tables.nodes
mapper(Node, nodes, properties={
'children': relationship(Node)
})
sess = create_session()
n2, n3 = Node(data='n2', children=[]), Node(data='n3', children=[])
n1 = Node(data='n1', children=[n2])
sess.add(n1)
sess.flush()
sess.delete(n2)
n3.id = n2.id
n1.children.append(n3)
sess.flush()
def test_bidirectional_mutations_one(self):
Node, nodes = self.classes.Node, self.tables.nodes
mapper(Node, nodes, properties={
'children': relationship(Node,
backref=backref('parent',
remote_side=nodes.c.id))
})
sess = create_session()
n2, n3 = Node(data='n2', children=[]), Node(data='n3', children=[])
n1 = Node(data='n1', children=[n2])
sess.add(n1)
sess.flush()
sess.delete(n2)
n1.children.append(n3)
sess.flush()
sess.delete(n1)
sess.delete(n3)
sess.flush()
def test_bidirectional_multilevel_save(self):
Node, nodes = self.classes.Node, self.tables.nodes
mapper(
Node,
nodes,
properties={
'children': relationship(
Node,
backref=backref(
'parent',
remote_side=nodes.c.id))})
sess = create_session()
n1 = Node(data='n1')
n1.children.append(Node(data='n11'))
n12 = Node(data='n12')
n1.children.append(n12)
n1.children.append(Node(data='n13'))
n1.children[1].children.append(Node(data='n121'))
n1.children[1].children.append(Node(data='n122'))
n1.children[1].children.append(Node(data='n123'))
sess.add(n1)
self.assert_sql_execution(
testing.db,
sess.flush,
CompiledSQL(
"INSERT INTO nodes (parent_id, data) VALUES "
"(:parent_id, :data)",
lambda ctx: {'parent_id': None, 'data': 'n1'}
),
CompiledSQL(
"INSERT INTO nodes (parent_id, data) VALUES "
"(:parent_id, :data)",
lambda ctx: {'parent_id': n1.id, 'data': 'n11'}
),
CompiledSQL(
"INSERT INTO nodes (parent_id, data) VALUES "
"(:parent_id, :data)",
lambda ctx: {'parent_id': n1.id, 'data': 'n12'}
),
CompiledSQL(
"INSERT INTO nodes (parent_id, data) VALUES "
"(:parent_id, :data)",
lambda ctx: {'parent_id': n1.id, 'data': 'n13'}
),
CompiledSQL(
"INSERT INTO nodes (parent_id, data) VALUES "
"(:parent_id, :data)",
lambda ctx: {'parent_id': n12.id, 'data': 'n121'}
),
CompiledSQL(
"INSERT INTO nodes (parent_id, data) VALUES "
"(:parent_id, :data)",
lambda ctx: {'parent_id': n12.id, 'data': 'n122'}
),
CompiledSQL(
"INSERT INTO nodes (parent_id, data) VALUES "
"(:parent_id, :data)",
lambda ctx: {'parent_id': n12.id, 'data': 'n123'}
),
)
def test_singlecycle_flush_size(self):
Node, nodes = self.classes.Node, self.tables.nodes
mapper(Node, nodes, properties={
'children': relationship(Node)
})
sess = create_session()
n1 = Node(data='ed')
sess.add(n1)
self._assert_uow_size(sess, 2)
sess.flush()
n1.data = 'jack'
self._assert_uow_size(sess, 2)
sess.flush()
n2 = Node(data='foo')
sess.add(n2)
sess.flush()
n1.children.append(n2)
self._assert_uow_size(sess, 3)
sess.flush()
sess = create_session()
n1 = sess.query(Node).first()
n1.data = 'ed'
self._assert_uow_size(sess, 2)
n1.children
self._assert_uow_size(sess, 2)
def test_delete_unloaded_m2o(self):
Node, nodes = self.classes.Node, self.tables.nodes
mapper(Node, nodes, properties={
'parent': relationship(Node, remote_side=nodes.c.id)
})
parent = Node()
c1, c2 = Node(parent=parent), Node(parent=parent)
session = Session()
session.add_all([c1, c2])
session.add(parent)
session.flush()
pid = parent.id
c1id = c1.id
c2id = c2.id
session.expire(parent)
session.expire(c1)
session.expire(c2)
session.delete(c1)
session.delete(c2)
session.delete(parent)
# testing that relationships
# are loaded even if all ids/references are
# expired
self.assert_sql_execution(
testing.db,
session.flush,
AllOf(
# ensure all three m2os are loaded.
# the selects here are in fact unexpiring
# each row - the m2o comes from the identity map.
CompiledSQL(
"SELECT nodes.id AS nodes_id, nodes.parent_id AS "
"nodes_parent_id, "
"nodes.data AS nodes_data FROM nodes "
"WHERE nodes.id = :param_1",
lambda ctx: {'param_1': pid}
),
CompiledSQL(
"SELECT nodes.id AS nodes_id, nodes.parent_id AS "
"nodes_parent_id, "
"nodes.data AS nodes_data FROM nodes "
"WHERE nodes.id = :param_1",
lambda ctx: {'param_1': c1id}
),
CompiledSQL(
"SELECT nodes.id AS nodes_id, nodes.parent_id AS "
"nodes_parent_id, "
"nodes.data AS nodes_data FROM nodes "
"WHERE nodes.id = :param_1",
lambda ctx: {'param_1': c2id}
),
AllOf(
CompiledSQL(
"DELETE FROM nodes WHERE nodes.id = :id",
lambda ctx: [{'id': c1id}, {'id': c2id}]
),
CompiledSQL(
"DELETE FROM nodes WHERE nodes.id = :id",
lambda ctx: {'id': pid}
),
),
),
)
class SingleCyclePlusAttributeTest(
fixtures.MappedTest,
testing.AssertsExecutionResults,
AssertsUOW):
@classmethod
def define_tables(cls, metadata):
Table('nodes', metadata,
Column('id', Integer, primary_key=True,
test_needs_autoincrement=True),
Column('parent_id', Integer, ForeignKey('nodes.id')),
Column('data', String(30))
)
Table('foobars', metadata,
Column('id', Integer, primary_key=True,
test_needs_autoincrement=True),
Column('parent_id', Integer, ForeignKey('nodes.id')),
)
def test_flush_size(self):
foobars, nodes = self.tables.foobars, self.tables.nodes
class Node(fixtures.ComparableEntity):
pass
class FooBar(fixtures.ComparableEntity):
pass
mapper(Node, nodes, properties={
'children': relationship(Node),
'foobars': relationship(FooBar)
})
mapper(FooBar, foobars)
sess = create_session()
n1 = Node(data='n1')
n2 = Node(data='n2')
n1.children.append(n2)
sess.add(n1)
# ensure "foobars" doesn't get yanked in here
self._assert_uow_size(sess, 3)
n1.foobars.append(FooBar())
# saveupdateall/deleteall for FooBar added here,
# plus processstate node.foobars
# currently the "all" procs stay in pairs
self._assert_uow_size(sess, 6)
sess.flush()
class SingleCycleM2MTest(fixtures.MappedTest,
testing.AssertsExecutionResults, AssertsUOW):
@classmethod
def define_tables(cls, metadata):
Table(
'nodes', metadata,
Column(
'id', Integer, primary_key=True,
test_needs_autoincrement=True),
Column(
'data', String(30)), Column(
'favorite_node_id', Integer, ForeignKey('nodes.id')))
Table(
'node_to_nodes', metadata,
Column(
'left_node_id', Integer,
ForeignKey('nodes.id'), primary_key=True),
Column(
'right_node_id', Integer,
ForeignKey('nodes.id'), primary_key=True),
)
def test_many_to_many_one(self):
nodes, node_to_nodes = self.tables.nodes, self.tables.node_to_nodes
class Node(fixtures.ComparableEntity):
pass
mapper(
Node,
nodes,
properties={
'children': relationship(
Node,
secondary=node_to_nodes,
primaryjoin=nodes.c.id == node_to_nodes.c.left_node_id,
secondaryjoin=nodes.c.id == node_to_nodes.c.right_node_id,
backref='parents'),
'favorite': relationship(
Node,
remote_side=nodes.c.id)})
sess = create_session()
n1 = Node(data='n1')
n2 = Node(data='n2')
n3 = Node(data='n3')
n4 = Node(data='n4')
n5 = Node(data='n5')
n4.favorite = n3
n1.favorite = n5
n5.favorite = n2
n1.children = [n2, n3, n4]
n2.children = [n3, n5]
n3.children = [n5, n4]
sess.add_all([n1, n2, n3, n4, n5])
# can't really assert the SQL on this easily
# since there's too many ways to insert the rows.
# so check the end result
sess.flush()
eq_(
sess.query(node_to_nodes.c.left_node_id,
node_to_nodes.c.right_node_id).
order_by(node_to_nodes.c.left_node_id,
node_to_nodes.c.right_node_id).
all(),
sorted([
(n1.id, n2.id), (n1.id, n3.id), (n1.id, n4.id),
(n2.id, n3.id), (n2.id, n5.id),
(n3.id, n5.id), (n3.id, n4.id)
])
)
sess.delete(n1)
self.assert_sql_execution(
testing.db,
sess.flush,
# this is n1.parents firing off, as it should, since
# passive_deletes is False for n1.parents
CompiledSQL(
"SELECT nodes.id AS nodes_id, nodes.data AS nodes_data, "
"nodes.favorite_node_id AS nodes_favorite_node_id FROM "
"nodes, node_to_nodes WHERE :param_1 = "
"node_to_nodes.right_node_id AND nodes.id = "
"node_to_nodes.left_node_id",
lambda ctx: {'param_1': n1.id},
),
CompiledSQL(
"DELETE FROM node_to_nodes WHERE "
"node_to_nodes.left_node_id = :left_node_id AND "
"node_to_nodes.right_node_id = :right_node_id",
lambda ctx: [
{'right_node_id': n2.id, 'left_node_id': n1.id},
{'right_node_id': n3.id, 'left_node_id': n1.id},
{'right_node_id': n4.id, 'left_node_id': n1.id}
]
),
CompiledSQL(
"DELETE FROM nodes WHERE nodes.id = :id",
lambda ctx: {'id': n1.id}
),
)
for n in [n2, n3, n4, n5]:
sess.delete(n)
# load these collections
# outside of the flush() below
n4.children
n5.children
self.assert_sql_execution(
testing.db,
sess.flush,
CompiledSQL(
"DELETE FROM node_to_nodes WHERE node_to_nodes.left_node_id "
"= :left_node_id AND node_to_nodes.right_node_id = "
":right_node_id",
lambda ctx: [
{'right_node_id': n5.id, 'left_node_id': n3.id},
{'right_node_id': n4.id, 'left_node_id': n3.id},
{'right_node_id': n3.id, 'left_node_id': n2.id},
{'right_node_id': n5.id, 'left_node_id': n2.id}
]
),
CompiledSQL(
"DELETE FROM nodes WHERE nodes.id = :id",
lambda ctx: [{'id': n4.id}, {'id': n5.id}]
),
CompiledSQL(
"DELETE FROM nodes WHERE nodes.id = :id",
lambda ctx: [{'id': n2.id}, {'id': n3.id}]
),
)
class RowswitchAccountingTest(fixtures.MappedTest):
@classmethod
def define_tables(cls, metadata):
Table('parent', metadata,
Column('id', Integer, primary_key=True),
Column('data', Integer)
)
Table('child', metadata,
Column('id', Integer, ForeignKey('parent.id'), primary_key=True),
Column('data', Integer)
)
def _fixture(self):
parent, child = self.tables.parent, self.tables.child
class Parent(fixtures.BasicEntity):
pass
class Child(fixtures.BasicEntity):
pass
mapper(Parent, parent, properties={
'child': relationship(Child, uselist=False,
cascade="all, delete-orphan",
backref="parent")
})
mapper(Child, child)
return Parent, Child
def test_switch_on_update(self):
Parent, Child = self._fixture()
sess = create_session(autocommit=False)
p1 = Parent(id=1, child=Child())
sess.add(p1)
sess.commit()
sess.close()
p2 = Parent(id=1, child=Child())
p3 = sess.merge(p2)
old = attributes.get_history(p3, 'child')[2][0]
assert old in sess
# essentially no SQL should emit here,
# because we've replaced the row with another identical one
sess.flush()
assert p3.child._sa_instance_state.session_id == sess.hash_key
assert p3.child in sess
p4 = Parent(id=1, child=Child())
p5 = sess.merge(p4)
old = attributes.get_history(p5, 'child')[2][0]
assert old in sess
sess.flush()
def test_switch_on_delete(self):
Parent, Child = self._fixture()
sess = Session()
p1 = Parent(id=1, data=2, child=None)
sess.add(p1)
sess.flush()
p1.id = 5
sess.delete(p1)
eq_(p1.id, 5)
sess.flush()
eq_(sess.scalar(self.tables.parent.count()), 0)
class RowswitchM2OTest(fixtures.MappedTest):
# tests for #3060 and related issues
@classmethod
def define_tables(cls, metadata):
Table(
'a', metadata,
Column('id', Integer, primary_key=True),
)
Table(
'b', metadata,
Column('id', Integer, primary_key=True),
Column('aid', ForeignKey('a.id')),
Column('cid', ForeignKey('c.id')),
Column('data', String(50))
)
Table(
'c', metadata,
Column('id', Integer, primary_key=True),
)
def _fixture(self):
a, b, c = self.tables.a, self.tables.b, self.tables.c
class A(fixtures.BasicEntity):
pass
class B(fixtures.BasicEntity):
pass
class C(fixtures.BasicEntity):
pass
mapper(A, a, properties={
'bs': relationship(B, cascade="all, delete-orphan")
})
mapper(B, b, properties={
'c': relationship(C)
})
mapper(C, c)
return A, B, C
def test_set_none_replaces_m2o(self):
# we have to deal here with the fact that a
# get of an unset attribute implicitly sets it to None
# with no history. So while we'd like "b.x = None" to
# record that "None" was added and we can then actively set it,
# a simple read of "b.x" ruins that; we'd have to dramatically
# alter the semantics of get() such that it creates history, which
# would incur extra work within the flush process to deal with
# change that previously showed up as nothing.
A, B, C = self._fixture()
sess = Session()
sess.add(
A(id=1, bs=[B(id=1, c=C(id=1))])
)
sess.commit()
a1 = sess.query(A).first()
a1.bs = [B(id=1, c=None)]
sess.commit()
assert a1.bs[0].c is None
def test_set_none_w_get_replaces_m2o(self):
A, B, C = self._fixture()
sess = Session()
sess.add(
A(id=1, bs=[B(id=1, c=C(id=1))])
)
sess.commit()
a1 = sess.query(A).first()
b2 = B(id=1)
assert b2.c is None
b2.c = None
a1.bs = [b2]
sess.commit()
assert a1.bs[0].c is None
def test_set_none_replaces_scalar(self):
# this case worked before #3060, because a straight scalar
# set of None shows up. Howver, as test_set_none_w_get
# shows, we can't rely on this - the get of None will blow
# away the history.
A, B, C = self._fixture()
sess = Session()
sess.add(
A(id=1, bs=[B(id=1, data='somedata')])
)
sess.commit()
a1 = sess.query(A).first()
a1.bs = [B(id=1, data=None)]
sess.commit()
assert a1.bs[0].data is None
def test_set_none_w_get_replaces_scalar(self):
A, B, C = self._fixture()
sess = Session()
sess.add(
A(id=1, bs=[B(id=1, data='somedata')])
)
sess.commit()
a1 = sess.query(A).first()
b2 = B(id=1)
assert b2.data is None
b2.data = None
a1.bs = [b2]
sess.commit()
assert a1.bs[0].data is None
class BasicStaleChecksTest(fixtures.MappedTest):
@classmethod
def define_tables(cls, metadata):
Table('parent', metadata,
Column('id', Integer, primary_key=True),
Column('data', Integer)
)
Table('child', metadata,
Column('id', Integer, ForeignKey('parent.id'), primary_key=True),
Column('data', Integer)
)
def _fixture(self, confirm_deleted_rows=True):
parent, child = self.tables.parent, self.tables.child
class Parent(fixtures.BasicEntity):
pass
class Child(fixtures.BasicEntity):
pass
mapper(Parent, parent, properties={
'child': relationship(Child, uselist=False,
cascade="all, delete-orphan",
backref="parent"),
}, confirm_deleted_rows=confirm_deleted_rows)
mapper(Child, child)
return Parent, Child
def test_update_single_missing(self):
Parent, Child = self._fixture()
sess = Session()
p1 = Parent(id=1, data=2)
sess.add(p1)
sess.flush()
sess.execute(self.tables.parent.delete())
p1.data = 3
assert_raises_message(
orm_exc.StaleDataError,
"UPDATE statement on table 'parent' expected to "
"update 1 row\(s\); 0 were matched.",
sess.flush
)
def test_update_single_missing_broken_multi_rowcount(self):
@util.memoized_property
def rowcount(self):
if len(self.context.compiled_parameters) > 1:
return -1
else:
return self.context.rowcount
with patch.object(
config.db.dialect, "supports_sane_multi_rowcount", False):
with patch(
"sqlalchemy.engine.result.ResultProxy.rowcount",
rowcount):
Parent, Child = self._fixture()
sess = Session()
p1 = Parent(id=1, data=2)
sess.add(p1)
sess.flush()
sess.execute(self.tables.parent.delete())
p1.data = 3
assert_raises_message(
orm_exc.StaleDataError,
"UPDATE statement on table 'parent' expected to "
"update 1 row\(s\); 0 were matched.",
sess.flush
)
def test_update_multi_missing_broken_multi_rowcount(self):
@util.memoized_property
def rowcount(self):
if len(self.context.compiled_parameters) > 1:
return -1
else:
return self.context.rowcount
with patch.object(
config.db.dialect, "supports_sane_multi_rowcount", False):
with patch(
"sqlalchemy.engine.result.ResultProxy.rowcount",
rowcount):
Parent, Child = self._fixture()
sess = Session()
p1 = Parent(id=1, data=2)
p2 = Parent(id=2, data=3)
sess.add_all([p1, p2])
sess.flush()
sess.execute(self.tables.parent.delete().where(Parent.id == 1))
p1.data = 3
p2.data = 4
sess.flush() # no exception
# update occurred for remaining row
eq_(
sess.query(Parent.id, Parent.data).all(),
[(2, 4)]
)
def test_update_value_missing_broken_multi_rowcount(self):
@util.memoized_property
def rowcount(self):
if len(self.context.compiled_parameters) > 1:
return -1
else:
return self.context.rowcount
with patch.object(
config.db.dialect, "supports_sane_multi_rowcount", False):
with patch(
"sqlalchemy.engine.result.ResultProxy.rowcount",
rowcount):
Parent, Child = self._fixture()
sess = Session()
p1 = Parent(id=1, data=1)
sess.add(p1)
sess.flush()
sess.execute(self.tables.parent.delete())
p1.data = literal(1)
assert_raises_message(
orm_exc.StaleDataError,
"UPDATE statement on table 'parent' expected to "
"update 1 row\(s\); 0 were matched.",
sess.flush
)
@testing.requires.sane_multi_rowcount
def test_delete_multi_missing_warning(self):
Parent, Child = self._fixture()
sess = Session()
p1 = Parent(id=1, data=2, child=None)
p2 = Parent(id=2, data=3, child=None)
sess.add_all([p1, p2])
sess.flush()
sess.execute(self.tables.parent.delete())
sess.delete(p1)
sess.delete(p2)
assert_raises_message(
exc.SAWarning,
"DELETE statement on table 'parent' expected to "
"delete 2 row\(s\); 0 were matched.",
sess.flush
)
def test_delete_multi_missing_allow(self):
Parent, Child = self._fixture(confirm_deleted_rows=False)
sess = Session()
p1 = Parent(id=1, data=2, child=None)
p2 = Parent(id=2, data=3, child=None)
sess.add_all([p1, p2])
sess.flush()
sess.execute(self.tables.parent.delete())
sess.delete(p1)
sess.delete(p2)
sess.flush()
class BatchInsertsTest(fixtures.MappedTest, testing.AssertsExecutionResults):
@classmethod
def define_tables(cls, metadata):
Table('t', metadata,
Column('id', Integer, primary_key=True,
test_needs_autoincrement=True),
Column('data', String(50)),
Column('def_', String(50), server_default='def1')
)
def test_batch_interaction(self):
"""test batching groups same-structured, primary
key present statements together.
"""
t = self.tables.t
class T(fixtures.ComparableEntity):
pass
mapper(T, t)
sess = Session()
sess.add_all([
T(data='t1'),
T(data='t2'),
T(id=3, data='t3'),
T(id=4, data='t4'),
T(id=5, data='t5'),
T(id=6, data=func.lower('t6')),
T(id=7, data='t7'),
T(id=8, data='t8'),
T(id=9, data='t9', def_='def2'),
T(id=10, data='t10', def_='def3'),
T(id=11, data='t11'),
])
self.assert_sql_execution(
testing.db,
sess.flush,
CompiledSQL(
"INSERT INTO t (data) VALUES (:data)",
{'data': 't1'}
),
CompiledSQL(
"INSERT INTO t (data) VALUES (:data)",
{'data': 't2'}
),
CompiledSQL(
"INSERT INTO t (id, data) VALUES (:id, :data)",
[{'data': 't3', 'id': 3},
{'data': 't4', 'id': 4},
{'data': 't5', 'id': 5}]
),
CompiledSQL(
"INSERT INTO t (id, data) VALUES (:id, lower(:lower_1))",
{'lower_1': 't6', 'id': 6}
),
CompiledSQL(
"INSERT INTO t (id, data) VALUES (:id, :data)",
[{'data': 't7', 'id': 7}, {'data': 't8', 'id': 8}]
),
CompiledSQL(
"INSERT INTO t (id, data, def_) VALUES (:id, :data, :def_)",
[{'data': 't9', 'id': 9, 'def_': 'def2'},
{'data': 't10', 'id': 10, 'def_': 'def3'}]
),
CompiledSQL(
"INSERT INTO t (id, data) VALUES (:id, :data)",
{'data': 't11', 'id': 11}
),
)
class LoadersUsingCommittedTest(UOWTest):
"""Test that events which occur within a flush()
get the same attribute loading behavior as on the outside
of the flush, and that the unit of work itself uses the
"committed" version of primary/foreign key attributes
when loading a collection for historical purposes (this typically
has importance for when primary key values change).
"""
def _mapper_setup(self, passive_updates=True):
users, Address, addresses, User = (self.tables.users,
self.classes.Address,
self.tables.addresses,
self.classes.User)
mapper(User, users, properties={
'addresses': relationship(Address,
order_by=addresses.c.email_address,
passive_updates=passive_updates,
backref='user')
})
mapper(Address, addresses)
return create_session(autocommit=False)
def test_before_update_m2o(self):
"""Expect normal many to one attribute load behavior
(should not get committed value)
from within public 'before_update' event"""
sess = self._mapper_setup()
Address, User = self.classes.Address, self.classes.User
def before_update(mapper, connection, target):
# if get committed is used to find target.user, then
# it will be still be u1 instead of u2
assert target.user.id == target.user_id == u2.id
from sqlalchemy import event
event.listen(Address, 'before_update', before_update)
a1 = Address(email_address='a1')
u1 = User(name='u1', addresses=[a1])
sess.add(u1)
u2 = User(name='u2')
sess.add(u2)
sess.commit()
sess.expunge_all()
# lookup an address and move it to the other user
a1 = sess.query(Address).get(a1.id)
# move address to another user's fk
assert a1.user_id == u1.id
a1.user_id = u2.id
sess.flush()
def test_before_update_o2m_passive(self):
"""Expect normal one to many attribute load behavior
(should not get committed value)
from within public 'before_update' event"""
self._test_before_update_o2m(True)
def test_before_update_o2m_notpassive(self):
"""Expect normal one to many attribute load behavior
(should not get committed value)
from within public 'before_update' event with
passive_updates=False
"""
self._test_before_update_o2m(False)
def _test_before_update_o2m(self, passive_updates):
sess = self._mapper_setup(passive_updates=passive_updates)
Address, User = self.classes.Address, self.classes.User
class AvoidReferencialError(Exception):
"""the test here would require ON UPDATE CASCADE on FKs
for the flush to fully succeed; this exception is used
to cancel the flush before we get that far.
"""
def before_update(mapper, connection, target):
if passive_updates:
# we shouldn't be using committed value.
# so, having switched target's primary key,
# we expect no related items in the collection
# since we are using passive_updates
# this is a behavior change since #2350
assert 'addresses' not in target.__dict__
eq_(target.addresses, [])
else:
# in contrast with passive_updates=True,
# here we expect the orm to have looked up the addresses
# with the committed value (it needs to in order to
# update the foreign keys). So we expect addresses
# collection to move with the user,
# (just like they will be after the update)
# collection is already loaded
assert 'addresses' in target.__dict__
eq_([a.id for a in target.addresses],
[a.id for a in [a1, a2]])
raise AvoidReferencialError()
from sqlalchemy import event
event.listen(User, 'before_update', before_update)
a1 = Address(email_address='jack1')
a2 = Address(email_address='jack2')
u1 = User(id=1, name='jack', addresses=[a1, a2])
sess.add(u1)
sess.commit()
sess.expunge_all()
u1 = sess.query(User).get(u1.id)
u1.id = 2
try:
sess.flush()
except AvoidReferencialError:
pass
class NoAttrEventInFlushTest(fixtures.MappedTest):
"""test [ticket:3167].
See also RefreshFlushInReturningTest in test/orm/test_events.py which
tests the positive case for the refresh_flush event, added in
[ticket:3427].
"""
__backend__ = True
@classmethod
def define_tables(cls, metadata):
Table(
'test', metadata,
Column('id', Integer, primary_key=True,
test_needs_autoincrement=True),
Column('prefetch_val', Integer, default=5),
Column('returning_val', Integer, server_default="5")
)
@classmethod
def setup_classes(cls):
class Thing(cls.Basic):
pass
@classmethod
def setup_mappers(cls):
Thing = cls.classes.Thing
mapper(Thing, cls.tables.test, eager_defaults=True)
def test_no_attr_events_flush(self):
Thing = self.classes.Thing
mock = Mock()
event.listen(Thing.id, "set", mock.id)
event.listen(Thing.prefetch_val, "set", mock.prefetch_val)
event.listen(Thing.returning_val, "set", mock.prefetch_val)
t1 = Thing()
s = Session()
s.add(t1)
s.flush()
eq_(len(mock.mock_calls), 0)
eq_(t1.id, 1)
eq_(t1.prefetch_val, 5)
eq_(t1.returning_val, 5)
class TypeWoBoolTest(fixtures.MappedTest, testing.AssertsExecutionResults):
"""test support for custom datatypes that return a non-__bool__ value
when compared via __eq__(), eg. ticket 3469"""
@classmethod
def define_tables(cls, metadata):
from sqlalchemy import TypeDecorator
class NoBool(object):
def __nonzero__(self):
raise NotImplementedError("not supported")
class MyWidget(object):
def __init__(self, text):
self.text = text
def __eq__(self, other):
return NoBool()
cls.MyWidget = MyWidget
class MyType(TypeDecorator):
impl = String(50)
def process_bind_param(self, value, dialect):
if value is not None:
value = value.text
return value
def process_result_value(self, value, dialect):
if value is not None:
value = MyWidget(value)
return value
Table(
'test', metadata,
Column('id', Integer, primary_key=True,
test_needs_autoincrement=True),
Column('value', MyType),
Column('unrelated', String(50))
)
@classmethod
def setup_classes(cls):
class Thing(cls.Basic):
pass
@classmethod
def setup_mappers(cls):
Thing = cls.classes.Thing
mapper(Thing, cls.tables.test)
def test_update_against_none(self):
Thing = self.classes.Thing
s = Session()
s.add(Thing(value=self.MyWidget("foo")))
s.commit()
t1 = s.query(Thing).first()
t1.value = None
s.commit()
eq_(
s.query(Thing.value).scalar(), None
)
def test_update_against_something_else(self):
Thing = self.classes.Thing
s = Session()
s.add(Thing(value=self.MyWidget("foo")))
s.commit()
t1 = s.query(Thing).first()
t1.value = self.MyWidget("bar")
s.commit()
eq_(
s.query(Thing.value).scalar().text, "bar"
)
def test_no_update_no_change(self):
Thing = self.classes.Thing
s = Session()
s.add(Thing(value=self.MyWidget("foo"), unrelated='unrelated'))
s.commit()
t1 = s.query(Thing).first()
t1.unrelated = 'something else'
self.assert_sql_execution(
testing.db,
s.commit,
CompiledSQL(
"UPDATE test SET unrelated=:unrelated "
"WHERE test.id = :test_id",
[{'test_id': 1, 'unrelated': 'something else'}]
),
)
eq_(
s.query(Thing.value).scalar().text, "foo"
)
class NullEvaluatingTest(fixtures.MappedTest, testing.AssertsExecutionResults):
@classmethod
def define_tables(cls, metadata):
from sqlalchemy import TypeDecorator
class EvalsNull(TypeDecorator):
impl = String(50)
should_evaluate_none = True
def process_bind_param(self, value, dialect):
if value is None:
value = 'nothing'
return value
Table(
'test', metadata,
Column('id', Integer, primary_key=True,
test_needs_autoincrement=True),
Column('evals_null_no_default', EvalsNull()),
Column('evals_null_default', EvalsNull(), default='default_val'),
Column('no_eval_null_no_default', String(50)),
Column('no_eval_null_default', String(50), default='default_val'),
Column(
'builtin_evals_null_no_default', String(50).evaluates_none()),
Column(
'builtin_evals_null_default',
String(50).evaluates_none(), default='default_val'),
)
@classmethod
def setup_classes(cls):
class Thing(cls.Basic):
pass
@classmethod
def setup_mappers(cls):
Thing = cls.classes.Thing
mapper(Thing, cls.tables.test)
def _assert_col(self, name, value):
Thing = self.classes.Thing
s = Session()
col = getattr(Thing, name)
obj = s.query(col).filter(col == value).one()
eq_(obj[0], value)
def _test_insert(self, attr, expected):
Thing = self.classes.Thing
s = Session()
t1 = Thing(**{attr: None})
s.add(t1)
s.commit()
self._assert_col(attr, expected)
def _test_bulk_insert(self, attr, expected):
Thing = self.classes.Thing
s = Session()
s.bulk_insert_mappings(
Thing, [{attr: None}]
)
s.commit()
self._assert_col(attr, expected)
def _test_insert_novalue(self, attr, expected):
Thing = self.classes.Thing
s = Session()
t1 = Thing()
s.add(t1)
s.commit()
self._assert_col(attr, expected)
def _test_bulk_insert_novalue(self, attr, expected):
Thing = self.classes.Thing
s = Session()
s.bulk_insert_mappings(
Thing, [{}]
)
s.commit()
self._assert_col(attr, expected)
def test_evalnull_nodefault_insert(self):
self._test_insert(
"evals_null_no_default", 'nothing'
)
def test_evalnull_nodefault_bulk_insert(self):
self._test_bulk_insert(
"evals_null_no_default", 'nothing'
)
def test_evalnull_nodefault_insert_novalue(self):
self._test_insert_novalue(
"evals_null_no_default", None
)
def test_evalnull_nodefault_bulk_insert_novalue(self):
self._test_bulk_insert_novalue(
"evals_null_no_default", None
)
def test_evalnull_default_insert(self):
self._test_insert(
"evals_null_default", 'nothing'
)
def test_evalnull_default_bulk_insert(self):
self._test_bulk_insert(
"evals_null_default", 'nothing'
)
def test_evalnull_default_insert_novalue(self):
self._test_insert_novalue(
"evals_null_default", 'default_val'
)
def test_evalnull_default_bulk_insert_novalue(self):
self._test_bulk_insert_novalue(
"evals_null_default", 'default_val'
)
def test_no_evalnull_nodefault_insert(self):
self._test_insert(
"no_eval_null_no_default", None
)
def test_no_evalnull_nodefault_bulk_insert(self):
self._test_bulk_insert(
"no_eval_null_no_default", None
)
def test_no_evalnull_nodefault_insert_novalue(self):
self._test_insert_novalue(
"no_eval_null_no_default", None
)
def test_no_evalnull_nodefault_bulk_insert_novalue(self):
self._test_bulk_insert_novalue(
"no_eval_null_no_default", None
)
def test_no_evalnull_default_insert(self):
self._test_insert(
"no_eval_null_default", 'default_val'
)
def test_no_evalnull_default_bulk_insert(self):
self._test_bulk_insert(
"no_eval_null_default", 'default_val'
)
def test_no_evalnull_default_insert_novalue(self):
self._test_insert_novalue(
"no_eval_null_default", 'default_val'
)
def test_no_evalnull_default_bulk_insert_novalue(self):
self._test_bulk_insert_novalue(
"no_eval_null_default", 'default_val'
)
def test_builtin_evalnull_nodefault_insert(self):
self._test_insert(
"builtin_evals_null_no_default", None
)
def test_builtin_evalnull_nodefault_bulk_insert(self):
self._test_bulk_insert(
"builtin_evals_null_no_default", None
)
def test_builtin_evalnull_nodefault_insert_novalue(self):
self._test_insert_novalue(
"builtin_evals_null_no_default", None
)
def test_builtin_evalnull_nodefault_bulk_insert_novalue(self):
self._test_bulk_insert_novalue(
"builtin_evals_null_no_default", None
)
def test_builtin_evalnull_default_insert(self):
self._test_insert(
"builtin_evals_null_default", None
)
def test_builtin_evalnull_default_bulk_insert(self):
self._test_bulk_insert(
"builtin_evals_null_default", None
)
def test_builtin_evalnull_default_insert_novalue(self):
self._test_insert_novalue(
"builtin_evals_null_default", 'default_val'
)
def test_builtin_evalnull_default_bulk_insert_novalue(self):
self._test_bulk_insert_novalue(
"builtin_evals_null_default", 'default_val'
)
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