Update clause silently ignores fields which are not present in schema

[dimsmol]

If field "a" is in schema, but "b" is not, the code

some_table.update().values(a=1, b=2)

generates

UPDATE some_table SET a=:a

without any warning.

It would be nice instead to raise an exception indicating that field "b" does not exist.

[Andrey Popp]

test case

[Mike Bayer]

need to stick with a warning until 0.8, see #2415

abe6c0f08a49859d8a2c36f4011e6f81ebf7ecb2

[Mike Bayer]

Removing milestone: 0.7.6 (automated comment)