issue 1918: Ensure string values for SpanAttributes.DB_MONGODB_COLLECTION

Author: cmpilato

CHANGELOG.md

@@ -63,6 +63,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
   ([#3936](https://github.com/open-telemetry/opentelemetry-python-contrib/pull/3936))
 - `opentelemetry-instrumentation-aiohttp-client`: Update instrumentor to respect suppressing http instrumentation
   ([#3957](https://github.com/open-telemetry/opentelemetry-python-contrib/pull/3957))
+- `opentelemetry-instrumentation-pymongo` Fix type-related errors in certain usages of the PyMongo span `DB_MONGODB_COLLECTION` attribute and trace error status descriptions
+  ([#2010](https://github.com/open-telemetry/opentelemetry-python-contrib/pull/2010))
 
 ## Version 1.38.0/0.59b0 (2025-10-16)
 

instrumentation/opentelemetry-instrumentation-pymongo/src/opentelemetry/instrumentation/pymongo/__init__.py

@@ -148,7 +148,7 @@ def started(self, event: monitoring.CommandStartedEvent):
                 )
                 span.set_attribute(SpanAttributes.DB_NAME, event.database_name)
                 span.set_attribute(SpanAttributes.DB_STATEMENT, statement)
-                if collection:
+                if collection and isinstance(collection, str):
                     span.set_attribute(
                         SpanAttributes.DB_MONGODB_COLLECTION, collection
                     )