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PYTHON-5488 append_metadata should not add duplicates #2461

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PYTHON-5488 append_metadata should not add duplicates #2461

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ba6d700
PYTHON-5488 `append_metadata` should not add duplicates
sleepyStick Aug 6, 2025
69f5a6a
make it case insensitive
sleepyStick Aug 7, 2025
5e47df3
add none check and refactor test
sleepyStick Aug 8, 2025
30f4ac1
always add |
sleepyStick Aug 11, 2025
a6f43ff
Merge branch 'master' into PYTHON-5488
sleepyStick Aug 11, 2025
c469174
fix test
sleepyStick Aug 11, 2025
a2f0caa
Merge branch 'PYTHON-5488' of https://github.com/sleepyStick/mongo-py…
sleepyStick Aug 11, 2025
b5314ab
simplify logic
sleepyStick Aug 11, 2025
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30 changes: 18 additions & 12 deletions pymongo/pool_options.py
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Original file line number Diff line number Diff line change
Expand Up @@ -386,20 +386,26 @@ def __init__(

def _update_metadata(self, driver: DriverInfo) -> None:
"""Updates the client's metadata"""
if driver.name and driver.name.lower() in self.__metadata["driver"]["name"].lower().split(
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Minor nit: we don't need the split() call here. Does having it improve readability?

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@sleepyStick sleepyStick Aug 11, 2025 •
edited
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I was mainly worried about potential substrings? like if driver.name is a substring of an existing name, its not the same and therefore still should be added?

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Ah good point! Great find on that edge case, better to be safe here and use the split!

"|"
):
return

metadata = copy.deepcopy(self.__metadata)
if driver.name:
metadata["driver"]["name"] = "{}|{}".format(
metadata["driver"]["name"],
driver.name,
)
if driver.version:
metadata["driver"]["version"] = "{}|{}".format(
metadata["driver"]["version"],
driver.version,
)
if driver.platform:
metadata["platform"] = "{}|{}".format(metadata["platform"], driver.platform)

name = driver.name or ""
version = driver.version or ""
platform = driver.platform or ""

metadata["driver"]["name"] = "{}|{}".format(
metadata["driver"]["name"],
name,
)
metadata["driver"]["version"] = "{}|{}".format(
metadata["driver"]["version"],
version,
)
metadata["platform"] = "{}|{}".format(metadata["platform"], platform)

self.__metadata = metadata

Expand Down
1 change: 1 addition & 0 deletions test/asynchronous/test_client.py
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Original file line number Diff line number Diff line change
Expand Up @@ -372,6 +372,7 @@ async def test_metadata(self):
else:
metadata["driver"]["name"] = "PyMongo|async|FooDriver"
metadata["driver"]["version"] = "{}|1.2.3".format(_METADATA["driver"]["version"])
metadata["platform"] = "{}|".format(_METADATA["platform"])
client = self.simple_client(
"foo",
27017,
Expand Down
35 changes: 26 additions & 9 deletions test/asynchronous/test_client_metadata.py
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Original file line number Diff line number Diff line change
Expand Up @@ -107,15 +107,20 @@ async def check_metadata_added(
new_name, new_version, new_platform, new_metadata = await self.send_ping_and_get_metadata(
client, True
)
self.assertEqual(new_name, f"{name}|{add_name}" if add_name is not None else name)
self.assertEqual(
new_version,
f"{version}|{add_version}" if add_version is not None else version,
)
self.assertEqual(
new_platform,
f"{platform}|{add_platform}" if add_platform is not None else platform,
)
if add_name is not None and add_name.lower() in name.lower().split("|"):
self.assertEqual(name, new_name)
self.assertEqual(version, new_version)
self.assertEqual(platform, new_platform)
else:
self.assertEqual(new_name, f"{name}|{add_name}" if add_name is not None else f"{name}|")
self.assertEqual(
new_version,
f"{version}|{add_version}" if add_version is not None else f"{version}|",
)
self.assertEqual(
new_platform,
f"{platform}|{add_platform}" if add_platform is not None else f"{platform}|",
)

metadata.pop("driver")
metadata.pop("platform")
Expand Down Expand Up @@ -210,6 +215,18 @@ async def test_doesnt_update_established_connections(self):
self.assertIsNone(self.handshake_req)
self.assertEqual(listener.event_count(ConnectionClosedEvent), 0)

async def test_duplicate_driver_name_no_op(self):
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Can we refactor check_metadata_added to support checking that the new metadata is the same as the old metadata? Most of this method is just duplicate code from check_metadata_added.

client = await self.async_rs_or_single_client(
"mongodb://" + self.server.address_string,
maxIdleTimeMS=1,
)
client.append_metadata(DriverInfo("library", "1.2", "Library Platform"))
await self.check_metadata_added(client, "framework", None, None)
# wait for connection to become idle
await asyncio.sleep(0.005)
# add same metadata again
await self.check_metadata_added(client, "Framework", None, None)


if __name__ == "__main__":
unittest.main()
1 change: 1 addition & 0 deletions test/test_client.py
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Original file line number Diff line number Diff line change
Expand Up @@ -365,6 +365,7 @@ def test_metadata(self):
else:
metadata["driver"]["name"] = "PyMongo|FooDriver"
metadata["driver"]["version"] = "{}|1.2.3".format(_METADATA["driver"]["version"])
metadata["platform"] = "{}|".format(_METADATA["platform"])
client = self.simple_client(
"foo",
27017,
Expand Down
35 changes: 26 additions & 9 deletions test/test_client_metadata.py
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Original file line number Diff line number Diff line change
Expand Up @@ -107,15 +107,20 @@ def check_metadata_added(
new_name, new_version, new_platform, new_metadata = self.send_ping_and_get_metadata(
client, True
)
self.assertEqual(new_name, f"{name}|{add_name}" if add_name is not None else name)
self.assertEqual(
new_version,
f"{version}|{add_version}" if add_version is not None else version,
)
self.assertEqual(
new_platform,
f"{platform}|{add_platform}" if add_platform is not None else platform,
)
if add_name is not None and add_name.lower() in name.lower().split("|"):
self.assertEqual(name, new_name)
self.assertEqual(version, new_version)
self.assertEqual(platform, new_platform)
else:
self.assertEqual(new_name, f"{name}|{add_name}" if add_name is not None else f"{name}|")
self.assertEqual(
new_version,
f"{version}|{add_version}" if add_version is not None else f"{version}|",
)
self.assertEqual(
new_platform,
f"{platform}|{add_platform}" if add_platform is not None else f"{platform}|",
)

metadata.pop("driver")
metadata.pop("platform")
Expand Down Expand Up @@ -210,6 +215,18 @@ def test_doesnt_update_established_connections(self):
self.assertIsNone(self.handshake_req)
self.assertEqual(listener.event_count(ConnectionClosedEvent), 0)

def test_duplicate_driver_name_no_op(self):
client = self.rs_or_single_client(
"mongodb://" + self.server.address_string,
maxIdleTimeMS=1,
)
client.append_metadata(DriverInfo("library", "1.2", "Library Platform"))
self.check_metadata_added(client, "framework", None, None)
# wait for connection to become idle
time.sleep(0.005)
# add same metadata again
self.check_metadata_added(client, "Framework", None, None)


if __name__ == "__main__":
unittest.main()
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