mirror of
https://github.com/sqlalchemy/sqlalchemy.git
synced 2026-06-01 05:18:44 -04:00
Mike Bayer
cf6c66e70e
make an alias() out of it distinctly. This to eliminate confusion over such issues as [ticket:1542]
59 lines
2.0 KiB
Python
59 lines
2.0 KiB
Python
"""Generic mapping to Select statements"""
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from sqlalchemy.test.testing import assert_raises, assert_raises_message
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import sqlalchemy as sa
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from sqlalchemy.test import testing
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from sqlalchemy import String, Integer, select
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from sqlalchemy.test.schema import Table, Column
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from sqlalchemy.orm import mapper, create_session
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from sqlalchemy.test.testing import eq_
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from test.orm import _base
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# TODO: more tests mapping to selects
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class SelectableNoFromsTest(_base.MappedTest):
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@classmethod
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def define_tables(cls, metadata):
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Table('common', metadata,
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Column('id', Integer, primary_key=True, test_needs_autoincrement=True),
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Column('data', Integer),
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Column('extra', String(45)))
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@classmethod
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def setup_classes(cls):
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class Subset(_base.ComparableEntity):
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pass
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@testing.resolve_artifact_names
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def test_no_tables(self):
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selectable = select(["x", "y", "z"]).alias()
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assert_raises_message(sa.exc.InvalidRequestError,
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"Could not find any Table objects",
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mapper, Subset, selectable)
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@testing.resolve_artifact_names
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def test_no_selects(self):
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subset_select = select([common.c.id, common.c.data])
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assert_raises(sa.exc.InvalidRequestError, mapper, Subset, subset_select)
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@testing.resolve_artifact_names
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def test_basic(self):
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subset_select = select([common.c.id, common.c.data]).alias()
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subset_mapper = mapper(Subset, subset_select)
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sess = create_session(bind=testing.db)
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sess.add(Subset(data=1))
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sess.flush()
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sess.expunge_all()
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eq_(sess.query(Subset).all(), [Subset(data=1)])
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eq_(sess.query(Subset).filter(Subset.data==1).one(), Subset(data=1))
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eq_(sess.query(Subset).filter(Subset.data!=1).first(), None)
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subset_select = sa.orm.class_mapper(Subset).mapped_table
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eq_(sess.query(Subset).filter(subset_select.c.data==1).one(),
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Subset(data=1))
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