query recording: also record bind_key of query

docs/record-queries.rst

@@ -25,3 +25,5 @@ object has the following attributes:
 ``location``
     A string description of where in your application code the query was executed. This
     may be unknown in certain cases.
+``bind_key``
+    The bind key of the engine which issued the query.

src/flask_sqlalchemy/extension.py

@@ -378,8 +378,8 @@ def init_app(self, app: Flask) -> None:
         if app.config.setdefault("SQLALCHEMY_RECORD_QUERIES", False):
             from . import record_queries
 
-            for engine in engines.values():
-                record_queries._listen(engine)
+            for bind_key, engine in engines.items():
+                record_queries._listen(bind_key, engine)
 
         if app.config.setdefault("SQLALCHEMY_TRACK_MODIFICATIONS", False):
             from . import track_modifications

src/flask_sqlalchemy/record_queries.py

@@ -3,6 +3,7 @@
 import dataclasses
 import inspect
 import typing as t
+from functools import partial
 from time import perf_counter
 
 import sqlalchemy as sa
@@ -65,15 +66,21 @@ class _QueryInfo:
     start_time: float
     end_time: float
     location: str
+    bind_key: str | None
 
     @property
     def duration(self) -> float:
         return self.end_time - self.start_time
 
 
-def _listen(engine: sa.engine.Engine) -> None:
+def _listen(bind_key: str | None, engine: sa.engine.Engine) -> None:
     sa_event.listen(engine, "before_cursor_execute", _record_start, named=True)
-    sa_event.listen(engine, "after_cursor_execute", _record_end, named=True)
+    sa_event.listen(
+        engine,
+        "after_cursor_execute",
+        partial(_record_end, bind_key),
+        named=True,
+    )
 
 
 def _record_start(context: sa.engine.ExecutionContext, **kwargs: t.Any) -> None:
@@ -83,7 +90,11 @@ def _record_start(context: sa.engine.ExecutionContext, **kwargs: t.Any) -> None:
     context._fsa_start_time = perf_counter()  # type: ignore[attr-defined]
 
 
-def _record_end(context: sa.engine.ExecutionContext, **kwargs: t.Any) -> None:
+def _record_end(
+    bind_key: str | None,
+    context: sa.engine.ExecutionContext,
+    **kwargs: t.Any,
+) -> None:
     if not has_app_context():
         return
 
@@ -113,5 +124,6 @@ def _record_end(context: sa.engine.ExecutionContext, **kwargs: t.Any) -> None:
             start_time=context._fsa_start_time,  # type: ignore[attr-defined]
             end_time=perf_counter(),
             location=location,
+            bind_key=bind_key,
         )
     )

tests/test_record_queries.py

@@ -49,3 +49,4 @@ class Todo(db.Model):  # type: ignore[no-redef]
     assert info.duration == info.end_time - info.start_time
     assert os.path.join("tests", "test_record_queries.py:") in info.location
     assert "(test_query_info)" in info.location
+    assert info.bind_key is None