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assert dest1.many_b == [b1, b2]
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assert sess.query(B).filter(B.bname == 'b1').one() is b1
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def test_polymorphic_backref(self):
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"""test multiple backrefs to the same polymorphically-loading
483
A, C, B, c_table, b_table, a_table, Dest, dest_table = (self.classes.A,
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493
ajoin = polymorphic_union({'a': a_table, 'b': b_table, 'c':c_table},