Method test_update_to_expression_one

test/sql/test_update.py:848–862

test update from an expression. this logic is triggered currently by a left side that doesn't have a key. The current supported use case is updating the index of a PostgreSQL ARRAY type.

(self)

        )

    def test_update_to_expression_one(self):
        """test update from an expression.

        this logic is triggered currently by a left side that doesn't
        have a key.  The current supported use case is updating the index
        of a PostgreSQL ARRAY type.

        """
        table1 = self.tables.mytable
        expr = func.foo(table1.c.myid)
        eq_(expr.key, None)
        self.assert_compile(
            table1.update().values({expr: "bar"}),
            "UPDATE mytable SET foo(myid)=:param_1",
        )

    def random_update_order_parameters():
        from sqlalchemy import ARRAY