Backport PR #997: fix: Use scalars instead of scalar having limit con…

…straint (#997) * use scalars instead of scalar having limit constraint Signed-off-by: Ahmad Wahid <[email protected]> * docs: changelog entry Signed-off-by: F.N. Claessen <[email protected]> --------- Signed-off-by: Ahmad Wahid <[email protected]> Signed-off-by: F.N. Claessen <[email protected]> Co-authored-by: F.N. Claessen <[email protected]>
FlexMeasures · Mar 1, 2024 · df63082 · df63082
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diff --git a/documentation/changelog.rst b/documentation/changelog.rst
@@ -11,6 +11,7 @@ v0.19.2 | March 1, 2024
 
 * Upgrade timely-beliefs to enhance our main time series query and fix a database index on time series data, leading to significantly better performance [see `PR #992 <https://github.com/FlexMeasures/flexmeasures/pull/992>`_]
 * Fix server error on loading the asset page for a public asset, due to a bug in the breadcrumb's sibling navigation [see `PR #991 <https://github.com/FlexMeasures/flexmeasures/pull/991>`_]
+* Restore compatibility with the `flexmeasures-openweathermap plugin <https://github.com/SeitaBV/flexmeasures-openweathermap>`_ by fixing the query for the closest weather sensor to a given asset [see `PR #997 <https://github.com/FlexMeasures/flexmeasures/pull/997>`_]
 
 
 v0.19.1 | February 26, 2024

diff --git a/flexmeasures/data/models/time_series.py b/flexmeasures/data/models/time_series.py
@@ -531,7 +531,7 @@ def find_closest(
             account_id=account_id_filter,
         )
         if n == 1:
-            return db.session.scalar(query.limit(1)).first()
+            return db.session.scalars(query.limit(1)).first()
         else:
             return db.session.scalars(query.limit(n)).all()