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Raise TypeError instead of InterfaceError on bad params on connect()

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TypeError is the standard Python error raised in this case:

    $ python -c "(lambda a: None)(b=10)"
    TypeError: <lambda>() got an unexpected keyword argument 'b'

We only used to raise InterfaceError when connect was used without
any parameter at all, so it's hard to think a program depending on
that design. Furthermore the function has always raised (and still
does) OperationalError too, if the bad argument is detected by the
libpq, and that cannot be changed because we can't tell the
difference from a normal connection error.
This commit is contained in:
Daniele Varrazzo 2012-09-26 11:55:21 +01:00
parent bc68b2ff1e
commit 74e6efd717
2 changed files with 8 additions and 8 deletions
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4
lib/__init__.py
View File

@ -164,13 +164,13 @@ def connect(dsn=None,
items.extend([(k, v) for (k, v) in kwargs.iteritems() if v is not None])
if dsn is not None and items:
raise InterfaceError(
raise TypeError(
"'%s' is an invalid keyword argument when the dsn is specified"
% items[0][0])
if dsn is None:
if not items:
raise InterfaceError('missing dsn and no parameters')
raise TypeError('missing dsn and no parameters')
else:
dsn = " ".join(["%s=%s" % (k, _param_escape(str(v)))
for (k, v) in items])

12
tests/test_module.py
View File

@ -40,10 +40,10 @@ class ConnectTestCase(unittest.TestCase):
psycopg2._connect = self._connect_orig
def test_there_has_to_be_something(self):
self.assertRaises(psycopg2.InterfaceError, psycopg2.connect)
self.assertRaises(psycopg2.InterfaceError, psycopg2.connect,
self.assertRaises(TypeError, psycopg2.connect)
self.assertRaises(TypeError, psycopg2.connect,
connection_factory=lambda dsn, async=False: None)
self.assertRaises(psycopg2.InterfaceError, psycopg2.connect,
self.assertRaises(TypeError, psycopg2.connect,
async=True)
def test_no_keywords(self):
@ -128,11 +128,11 @@ class ConnectTestCase(unittest.TestCase):
self.assertEqual(self.args[0], r"dbname='\\every thing\''")
def test_no_kwargs_swallow(self):
self.assertRaises(psycopg2.InterfaceError,
self.assertRaises(TypeError,
psycopg2.connect, 'dbname=foo', database='foo')
self.assertRaises(psycopg2.InterfaceError,
self.assertRaises(TypeError,
psycopg2.connect, 'dbname=foo', user='postgres')
self.assertRaises(psycopg2.InterfaceError,
self.assertRaises(TypeError,
psycopg2.connect, 'dbname=foo', no_such_param='meh')