Properly propagate config for metric when created from measure (#12135)

* Propagate measure.config to metric.config when specified during create_metric:True

* changelog

* Update the metric.expr to be populated correctly according to DSI rules

Author: WilliamDee

.changes/unreleased/Under the Hood-20251103-005311.yaml

@@ -0,0 +1,6 @@
+kind: Under the Hood
+body: Fixes issue where config isn't propagated to metric from measure when set as create_metric:True
+time: 2025-11-03T00:53:11.354097-05:00
+custom:
+    Author: WilliamDee
+    Issue: None

core/dbt/parser/schema_yaml_readers.py

@@ -633,14 +633,21 @@ def _create_metric(
         measure: UnparsedMeasure,
         enabled: bool,
         semantic_model_name: str,
+        meta: Optional[Dict[str, Any]] = None,
     ) -> None:
+        config: Dict[str, Any] = {"enabled": enabled}
+        if meta is not None:
+            # Need to propagate meta to metric from measure during create_metric: True
+            config["meta"] = meta
         unparsed_metric = UnparsedMetric(
             name=measure.name,
             label=measure.label or measure.name,
             type="simple",
-            type_params=UnparsedMetricTypeParams(measure=measure.name, expr=measure.name),
+            type_params=UnparsedMetricTypeParams(
+                measure=measure.name, expr=measure.expr or measure.name  # type: ignore
+            ),
             description=measure.description or f"Metric created from measure {measure.name}",
-            config={"enabled": enabled},
+            config=config,
         )
 
         parser = MetricParser(self.schema_parser, yaml=self.yaml)
@@ -758,7 +765,10 @@ def parse_semantic_model(self, unparsed: UnparsedSemanticModel) -> None:
         for measure in unparsed.measures:
             if measure.create_metric is True:
                 self._create_metric(
-                    measure=measure, enabled=parsed.config.enabled, semantic_model_name=parsed.name
+                    measure=measure,
+                    enabled=parsed.config.enabled,
+                    semantic_model_name=parsed.name,
+                    meta=config.meta if config is not None else None,
                 )
 
     def parse(self) -> None: