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86 lines
2.4 KiB
Python
86 lines
2.4 KiB
Python
from .. import fixtures, config
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from ..assertions import eq_
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from sqlalchemy import util
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from sqlalchemy import Integer, String, select, func
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from ..schema import Table, Column
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class OrderByLabelTest(fixtures.TablesTest):
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"""Test the dialect sends appropriate ORDER BY expressions when
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labels are used.
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This essentially exercises the "supports_simple_order_by_label"
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setting.
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"""
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__backend__ = True
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@classmethod
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def define_tables(cls, metadata):
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Table("some_table", metadata,
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Column('id', Integer, primary_key=True),
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Column('x', Integer),
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Column('y', Integer),
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Column('q', String(50)),
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Column('p', String(50))
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)
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@classmethod
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def insert_data(cls):
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config.db.execute(
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cls.tables.some_table.insert(),
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[
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{"id": 1, "x": 1, "y": 2, "q": "q1", "p": "p3"},
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{"id": 2, "x": 2, "y": 3, "q": "q2", "p": "p2"},
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{"id": 3, "x": 3, "y": 4, "q": "q3", "p": "p1"},
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]
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)
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def _assert_result(self, select, result):
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eq_(
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config.db.execute(select).fetchall(),
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result
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)
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def test_plain(self):
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table = self.tables.some_table
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lx = table.c.x.label('lx')
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self._assert_result(
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select([lx]).order_by(lx),
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[(1, ), (2, ), (3, )]
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)
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def test_composed_int(self):
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table = self.tables.some_table
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lx = (table.c.x + table.c.y).label('lx')
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self._assert_result(
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select([lx]).order_by(lx),
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[(3, ), (5, ), (7, )]
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)
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def test_composed_multiple(self):
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table = self.tables.some_table
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lx = (table.c.x + table.c.y).label('lx')
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ly = (func.lower(table.c.q) + table.c.p).label('ly')
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self._assert_result(
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select([lx, ly]).order_by(lx, ly.desc()),
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[(3, util.u('q1p3')), (5, util.u('q2p2')), (7, util.u('q3p1'))]
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)
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def test_plain_desc(self):
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table = self.tables.some_table
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lx = table.c.x.label('lx')
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self._assert_result(
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select([lx]).order_by(lx.desc()),
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[(3, ), (2, ), (1, )]
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)
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def test_composed_int_desc(self):
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table = self.tables.some_table
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lx = (table.c.x + table.c.y).label('lx')
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self._assert_result(
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select([lx]).order_by(lx.desc()),
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[(7, ), (5, ), (3, )]
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)
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