mirror of
https://github.com/sqlalchemy/sqlalchemy.git
synced 2026-05-11 11:22:15 -04:00
Mike Bayer
5e8396a60e
No SQLA built-in subclasses ColumnElement without specifying an alternate visit_name, and user defined ColumnElement subclasses should avoid being treated like ColumnClause, e.g. where a Table is present. Fixes: #4142 Change-Id: I15ed09ba8bdebae4cb0c7e5e5df3f59351477577
121 lines
3.2 KiB
Python
121 lines
3.2 KiB
Python
from sqlalchemy.testing import fixtures, is_true, is_false, eq_
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from sqlalchemy import MetaData, Table, Column, Integer, String
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from sqlalchemy import and_, or_, bindparam
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from sqlalchemy.sql.elements import ClauseList, ColumnElement
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from sqlalchemy.sql import operators
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from sqlalchemy.sql import util as sql_util
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class CompareClausesTest(fixtures.TestBase):
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def setup(self):
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m = MetaData()
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self.a = Table(
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'a', m,
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Column('x', Integer),
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Column('y', Integer)
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)
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self.b = Table(
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'b', m,
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Column('y', Integer),
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Column('z', Integer)
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)
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def test_compare_clauselist_associative(self):
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l1 = and_(
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self.a.c.x == self.b.c.y,
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self.a.c.y == self.b.c.z
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)
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l2 = and_(
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self.a.c.y == self.b.c.z,
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self.a.c.x == self.b.c.y,
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)
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l3 = and_(
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self.a.c.x == self.b.c.z,
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self.a.c.y == self.b.c.y
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)
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is_true(l1.compare(l1))
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is_true(l1.compare(l2))
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is_false(l1.compare(l3))
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def test_compare_clauselist_not_associative(self):
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l1 = ClauseList(
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self.a.c.x, self.a.c.y, self.b.c.y, operator=operators.sub)
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l2 = ClauseList(
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self.b.c.y, self.a.c.x, self.a.c.y, operator=operators.sub)
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is_true(l1.compare(l1))
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is_false(l1.compare(l2))
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def test_compare_clauselist_assoc_different_operator(self):
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l1 = and_(
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self.a.c.x == self.b.c.y,
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self.a.c.y == self.b.c.z
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)
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l2 = or_(
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self.a.c.y == self.b.c.z,
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self.a.c.x == self.b.c.y,
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)
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is_false(l1.compare(l2))
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def test_compare_clauselist_not_assoc_different_operator(self):
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l1 = ClauseList(
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self.a.c.x, self.a.c.y, self.b.c.y, operator=operators.sub)
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l2 = ClauseList(
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self.a.c.x, self.a.c.y, self.b.c.y, operator=operators.div)
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is_false(l1.compare(l2))
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def test_compare_binds(self):
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b1 = bindparam("foo", type_=Integer())
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b2 = bindparam("foo", type_=Integer())
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b3 = bindparam("bar", type_=Integer())
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b4 = bindparam("foo", type_=String())
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def c1(): return 5
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def c2(): return 6
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b5 = bindparam("foo", type_=Integer(), callable_=c1)
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b6 = bindparam("foo", type_=Integer(), callable_=c2)
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b7 = bindparam("foo", type_=Integer(), callable_=c1)
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b8 = bindparam("foo", type_=Integer, value=5)
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b9 = bindparam("foo", type_=Integer, value=6)
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is_false(b1.compare(b5))
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is_true(b5.compare(b7))
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is_false(b5.compare(b6))
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is_true(b1.compare(b2))
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# currently not comparing "key", as we often have to compare
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# anonymous names. however we should really check for that
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is_true(b1.compare(b3))
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is_false(b1.compare(b4))
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is_false(b1.compare(b8))
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is_false(b8.compare(b9))
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is_true(b8.compare(b8))
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class MiscTest(fixtures.TestBase):
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def test_column_element_no_visit(self):
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class MyElement(ColumnElement):
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pass
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eq_(
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sql_util.find_tables(MyElement(), check_columns=True),
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[]
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)
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