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handle None parameters in query, returning NULL #1180

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Merged
merged 3 commits into from
Oct 17, 2024
Merged

handle None parameters in query, returning NULL #1180

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c78eec1
handle `None` parameters in query, returning NULL
fobispotc Sep 8, 2024
d43ef44
Add a test
elprans Oct 17, 2024
7d4e43c
Merge branch 'master' into fobispotc/fix-mogrify-for-nulls
elprans Oct 17, 2024
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9 changes: 8 additions & 1 deletion asyncpg/utils.py
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Original file line number Diff line number Diff line change
Expand Up @@ -42,4 +42,11 @@ async def _mogrify(conn, query, args):

# Finally, replace $n references with text values.
return re.sub(
r'\$(\d+)\b', lambda m: textified[int(m.group(1)) - 1], query)
r"\$(\d+)\b",
lambda m: (
textified[int(m.group(1)) - 1]
if textified[int(m.group(1)) - 1] is not None
else "NULL"
),
query,
)
8 changes: 5 additions & 3 deletions tests/test_copy.py
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Expand Up @@ -148,20 +148,22 @@ async def test_copy_from_query_with_args(self):

res = await self.con.copy_from_query('''
SELECT
i, i * 10
i,
i * 10,
$2::text
FROM
generate_series(1, 5) AS i
WHERE
i = $1
''', 3, output=f)
''', 3, None, output=f)

self.assertEqual(res, 'COPY 1')

output = f.getvalue().decode().split('\n')
self.assertEqual(
output,
[
'3\t30',
'3\t30\t\\N',
''
]
)
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