mirror of
https://github.com/sqlalchemy/sqlalchemy.git
synced 2026-05-16 05:37:16 -04:00
Mike Bayer
91 lines
2.5 KiB
Python
Executable File
91 lines
2.5 KiB
Python
Executable File
"""tests that various From objects properly export their columns, as well as useable primary keys
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and foreign keys. Full relational algebra depends on every selectable unit behaving
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nicely with others.."""
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import testbase
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import unittest, sys, datetime
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db = testbase.db
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from sqlalchemy import *
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table = Table('table1', db,
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Column('col1', Integer, primary_key=True),
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Column('col2', String(20)),
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Column('col3', Integer),
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redefine=True
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)
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table2 = Table('table2', db,
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Column('col1', Integer, primary_key=True),
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Column('col2', Integer, ForeignKey('table1.col1')),
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Column('col3', String(20)),
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redefine=True
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)
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class SelectableTest(testbase.AssertMixin):
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def testtablealias(self):
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a = table.alias('a')
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j = join(a, table2)
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criterion = a.c.col1 == table2.c.col2
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print
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print str(j)
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self.assert_(criterion.compare(j.onclause))
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def testjoin(self):
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a = join(table, table2)
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print str(a.select(use_labels=True))
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# TODO - figure out what we're trying to do here
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return
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b = table2.alias('b')
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j = join(a, b)
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print str(j)
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return
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criterion = a.c.col1 == b.c.col2
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print
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print str(j)
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self.assert_(criterion.compare(j.onclause))
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def testselectalias(self):
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a = table.select().alias('a')
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print str(a.select())
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j = join(a, table2)
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criterion = a.c.col1 == table2.c.col2
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print
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print str(j)
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self.assert_(criterion.compare(j.onclause))
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def testselectlabels(self):
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a = table.select(use_labels=True)
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print str(a.select())
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j = join(a, table2)
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criterion = a.c.table1_col1 == table2.c.col2
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print
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print str(j)
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self.assert_(criterion.compare(j.onclause))
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def testcolumnlabels(self):
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a = select([table.c.col1.label('acol1'), table.c.col2.label('acol2'), table.c.col3.label('acol3')])
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print str(a)
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print [c for c in a.columns]
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j = join(a, table2)
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def testselectaliaslabels(self):
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a = table2.select(use_labels=True).alias('a')
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print str(a.select())
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j = join(a, table)
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criterion = table.c.col1 == a.c.table2_col2
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print str(criterion)
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print str(j.onclause)
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self.assert_(criterion.compare(j.onclause))
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if __name__ == "__main__":
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testbase.main()
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