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from sqlalchemy import cast
from sqlalchemy import Column
from sqlalchemy import func
from sqlalchemy import MetaData
from sqlalchemy import select
from sqlalchemy import String
from sqlalchemy import Table
from sqlalchemy import testing
from sqlalchemy import TypeDecorator
from sqlalchemy.testing import AssertsCompiledSQL
from sqlalchemy.testing import eq_
from sqlalchemy.testing import fixtures
class _ExprFixture(object):
def _fixture(self):
class MyString(String):
def bind_expression(self, bindvalue):
return func.lower(bindvalue)
def column_expression(self, col):
return func.lower(col)
test_table = Table(
"test_table",
MetaData(),
Column("x", String),
Column("y", MyString),
)
return test_table
class SelectTest(_ExprFixture, fixtures.TestBase, AssertsCompiledSQL):
__dialect__ = "default"
def test_select_cols(self):
table = self._fixture()
self.assert_compile(
select([table]),
"SELECT test_table.x, lower(test_table.y) AS y FROM test_table",
)
def test_anonymous_expr(self):
table = self._fixture()
self.assert_compile(
select([cast(table.c.y, String)]),
"SELECT CAST(test_table.y AS VARCHAR) AS anon_1 FROM test_table",
)
def test_select_cols_use_labels(self):
table = self._fixture()
self.assert_compile(
select([table]).apply_labels(),
"SELECT test_table.x AS test_table_x, "
"lower(test_table.y) AS test_table_y FROM test_table",
)
def test_select_cols_use_labels_result_map_targeting(self):
table = self._fixture()
compiled = select([table]).apply_labels().compile()
assert table.c.y in compiled._create_result_map()["test_table_y"][1]
assert table.c.x in compiled._create_result_map()["test_table_x"][1]
# the lower() function goes into the result_map, we don't really
# need this but it's fine
self.assert_compile(
compiled._create_result_map()["test_table_y"][1][3],
"lower(test_table.y)",
)
# then the original column gets put in there as well.
# as of 1.1 it's important that it is first as this is
# taken as significant by the result processor.
self.assert_compile(
compiled._create_result_map()["test_table_y"][1][0], "test_table.y"
)
def test_insert_binds(self):
table = self._fixture()
self.assert_compile(
table.insert(),
"INSERT INTO test_table (x, y) VALUES (:x, lower(:y))",
)
self.assert_compile(
table.insert().values(y="hi"),
"INSERT INTO test_table (y) VALUES (lower(:y))",
)
def test_select_binds(self):
table = self._fixture()
self.assert_compile(
select([table]).where(table.c.y == "hi"),
"SELECT test_table.x, lower(test_table.y) AS y FROM "
"test_table WHERE test_table.y = lower(:y_1)",
)
class DerivedTest(_ExprFixture, fixtures.TestBase, AssertsCompiledSQL):
__dialect__ = "default"
def test_select_from_select(self):
table = self._fixture()
self.assert_compile(
table.select().select(),
"SELECT x, lower(y) AS y FROM (SELECT test_table.x "
"AS x, test_table.y AS y FROM test_table)",
)
def test_select_from_alias(self):
table = self._fixture()
self.assert_compile(
table.select().alias().select(),
"SELECT anon_1.x, lower(anon_1.y) AS y FROM (SELECT "
"test_table.x AS x, test_table.y AS y "
"FROM test_table) AS anon_1",
)
def test_select_from_aliased_join(self):
table = self._fixture()
s1 = table.select().alias()
s2 = table.select().alias()
j = s1.join(s2, s1.c.x == s2.c.x)
s3 = j.select()
self.assert_compile(
s3,
"SELECT anon_1.x, lower(anon_1.y) AS y, anon_2.x, "
"lower(anon_2.y) AS y "
"FROM (SELECT test_table.x AS x, test_table.y AS y "
"FROM test_table) AS anon_1 JOIN (SELECT "
"test_table.x AS x, test_table.y AS y "
"FROM test_table) AS anon_2 ON anon_1.x = anon_2.x",
)
class RoundTripTestBase(object):
def test_round_trip(self):
testing.db.execute(
self.tables.test_table.insert(),
{"x": "X1", "y": "Y1"},
{"x": "X2", "y": "Y2"},
{"x": "X3", "y": "Y3"},
)
# test insert coercion alone
eq_(
testing.db.execute(
"select * from test_table order by y"
).fetchall(),
[("X1", "y1"), ("X2", "y2"), ("X3", "y3")],
)
# conversion back to upper
eq_(
testing.db.execute(
select([self.tables.test_table]).order_by(
self.tables.test_table.c.y
)
).fetchall(),
[("X1", "Y1"), ("X2", "Y2"), ("X3", "Y3")],
)
def test_targeting_no_labels(self):
testing.db.execute(
self.tables.test_table.insert(), {"x": "X1", "y": "Y1"}
)
row = testing.db.execute(select([self.tables.test_table])).first()
eq_(row[self.tables.test_table.c.y], "Y1")
def test_targeting_by_string(self):
testing.db.execute(
self.tables.test_table.insert(), {"x": "X1", "y": "Y1"}
)
row = testing.db.execute(select([self.tables.test_table])).first()
eq_(row["y"], "Y1")
def test_targeting_apply_labels(self):
testing.db.execute(
self.tables.test_table.insert(), {"x": "X1", "y": "Y1"}
)
row = testing.db.execute(
select([self.tables.test_table]).apply_labels()
).first()
eq_(row[self.tables.test_table.c.y], "Y1")
def test_targeting_individual_labels(self):
testing.db.execute(
self.tables.test_table.insert(), {"x": "X1", "y": "Y1"}
)
row = testing.db.execute(
select(
[
self.tables.test_table.c.x.label("xbar"),
self.tables.test_table.c.y.label("ybar"),
]
)
).first()
eq_(row[self.tables.test_table.c.y], "Y1")
class StringRoundTripTest(fixtures.TablesTest, RoundTripTestBase):
@classmethod
def define_tables(cls, metadata):
class MyString(String):
def bind_expression(self, bindvalue):
return func.lower(bindvalue)
def column_expression(self, col):
return func.upper(col)
Table(
"test_table",
metadata,
Column("x", String(50)),
Column("y", MyString(50)),
)
class TypeDecRoundTripTest(fixtures.TablesTest, RoundTripTestBase):
@classmethod
def define_tables(cls, metadata):
class MyString(TypeDecorator):
impl = String
def bind_expression(self, bindvalue):
return func.lower(bindvalue)
def column_expression(self, col):
return func.upper(col)
Table(
"test_table",
metadata,
Column("x", String(50)),
Column("y", MyString(50)),
)
class ReturningTest(fixtures.TablesTest):
__requires__ = ("returning",)
@classmethod
def define_tables(cls, metadata):
class MyString(String):
def column_expression(self, col):
return func.lower(col)
Table(
"test_table",
metadata,
Column("x", String(50)),
Column("y", MyString(50), server_default="YVALUE"),
)
@testing.provide_metadata
def test_insert_returning(self):
table = self.tables.test_table
result = testing.db.execute(
table.insert().returning(table.c.y), {"x": "xvalue"}
)
eq_(result.first(), ("yvalue",))
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