betodealmeida commented on code in PR #30721:
URL: https://github.com/apache/superset/pull/30721#discussion_r1822726235


##########
superset/datasets/api.py:
##########
@@ -1179,13 +1185,22 @@ def render_item_list(item_list: list[dict[str, Any]]) 
-> list[dict[str, Any]]:
                 for item in item_list
             ]
 
-        if metrics := data.get("metrics"):
-            data["metrics"] = render_item_list(metrics)
+        item_type: str | None = None
+        try:
+            if metrics := data.get("metrics"):
+                item_type = "metric"
+                data["metrics"] = render_item_list(metrics)
 
-        if columns := data.get("columns"):
-            data["columns"] = render_item_list(columns)
+            if columns := data.get("columns"):
+                item_type = "column"
+                data["columns"] = render_item_list(columns)
 
-        if sql := data.get("sql"):
-            data["rendered_sql"] = processor.process_template(sql)
+            if sql := data.get("sql"):
+                item_type = "query"
+                data["rendered_sql"] = processor.process_template(sql)
+        except TemplateSyntaxError as ex:
+            raise SupersetTemplateException(
+                f"Unable to render expression from dataset {item_type}.",
+            ) from ex

Review Comment:
   Could possibly be simplified to:
   
   ```python
   items = [
       ("query", "sql", "rendered_sql", processor.process_template),
       ("metric", "metrics", "metrics", render_item_list),
       ("column", "columns", "columns", render_item_list),
   ]
   for item_type, key, new_key, func in items:
       if key not in data:  # or if not data.get(key), potentially
           continue
   
       try:
           data[new_key] = func(data[key])
       except TemplateSyntaxError as ex:
           raise SupersetTemplateException(
               f"Unable to render expression from dataset {item_type}.",
           ) from ex
   ```
   
   But it's perfectly fine as is.



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