bito-code-review[bot] commented on code in PR #44746:
URL: https://github.com/apache/superset/pull/44746#discussion_r4121503906


##########
tests/unit_tests/mcp_service/chart/tool/test_get_chart_data.py:
##########
@@ -3488,3 +3488,40 @@ def run(self) -> dict[str, Any]:
             await client.call_tool("get_chart_data", {"request": 
{"identifier": "11"}})
 
         assert captured["order_desc"] is False
+
+
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+    "invalid_fields, message",
+    [
+        ({"start_time": None}, "start_time"),
+        ({"end_time": None}, "end_time"),
+        ({"y_axis": None}, "y_axis"),
+        ({"tooltip_columns": ["task"] * 51}, "tooltip_columns"),
+        ({"order_by_cols": [["start", "yes"]]}, "ascending_boolean"),
+    ],

Review Comment:
   <div>
   
   
   <div id="suggestion">
   <div id="issue"><b>Missing tooltip_metrics case</b></div>
   <div id="fix">
   
   The parametrize set covers `tooltip_columns` overflow but omits 
`tooltip_metrics`, which `resolve_gantt_query_fields` validates identically 
(`Gantt tooltip_metrics must contain at most 50 entries`, 
chart_helpers.py:626-627). No test in this file exercises `tooltip_metrics` 
(grep: 0 matches). Adding one parametrize case closes the gap in the 
docstring's promised "malformed cached Gantt roles" coverage.
   </div>
   
   
   </div>
   
   
   
   
   <small><i>Code Review Run #bd88ea</i></small>
   </div>
   
   ---
   Should Bito avoid suggestions like this for future reviews? (<a 
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##########
tests/unit_tests/mcp_service/chart/tool/test_get_chart_data.py:
##########
@@ -3488,3 +3488,40 @@ def run(self) -> dict[str, Any]:
             await client.call_tool("get_chart_data", {"request": 
{"identifier": "11"}})
 
         assert captured["order_desc"] is False
+
+
[email protected]
[email protected](
+    "invalid_fields, message",
+    [
+        ({"start_time": None}, "start_time"),
+        ({"end_time": None}, "end_time"),
+        ({"y_axis": None}, "y_axis"),
+        ({"tooltip_columns": ["task"] * 51}, "tooltip_columns"),
+        ({"order_by_cols": [["start", "yes"]]}, "ascending_boolean"),
+    ],
+)
+async def test_malformed_gantt_query_returns_validation_error(
+    invalid_fields: dict[str, Any],
+    message: str,
+) -> None:
+    """Reject malformed cached Gantt roles without reporting an internal 
failure."""
+    with patch(
+        "superset.mcp_service.chart.chart_helpers.resolve_datasource_engine",
+        return_value="sqlite",
+    ):

Review Comment:
   <div>
   
   
   <div id="suggestion">
   <div id="issue"><b>Inconsistent mock pattern</b></div>
   <div id="fix">
   
   `resolve_datasource_engine` is patched with `patch(..., 
return_value="sqlite")`, but its real signature takes `(datasource_id, 
datasource_type)` (chart_helpers.py:180). A MagicMock swallows any call, so a 
future signature change would go undetected here. Sibling tests in this file 
use `monkeypatch.setattr` with lambdas (lines 572-575, 2474-2477); following 
that pattern keeps mocking consistent and signature-sensitive.
   </div>
   
   
   </div>
   
   <details>
   <summary><b>Citations</b></summary>
   <ul>
   
   <li>
   Rule Violated: <a 
href="https://github.com/apache/superset/blob/49b2e0a/.cursor/rules/dev-standard.mdc#L119";>dev-standard.mdc:119</a>
   </li>
   
   </ul>
   </details>
   
   
   
   
   <small><i>Code Review Run #bd88ea</i></small>
   </div>
   
   ---
   Should Bito avoid suggestions like this for future reviews? (<a 
href=https://alpha.bito.ai/home/ai-agents/review-rules>Manage Rules</a>)
   - [ ] Yes, avoid them



##########
superset/mcp_service/chart/plugins/treemap.py:
##########
@@ -150,3 +162,114 @@ def schema_error_hint(self) -> ChartGenerationError | 
None:
             ],
             error_code="TREEMAP_VALIDATION_ERROR",
         )
+
+    def resolve_query_fields(
+        self, form_data: Mapping[str, Any], viz_type: str
+    ) -> tuple[list[Any], list[Any]] | None:
+        # Treemap has exactly these roles; stale controls from another plugin
+        # must not override its singular metric or ordered hierarchy.
+        metric = form_data.get("metric")
+        hierarchy = form_data.get("groupby") or []
+        return ([metric] if metric else []), (
+            [hierarchy] if isinstance(hierarchy, str) else list(hierarchy)
+        )
+
+    def build_query_dicts(
+        self,
+        form_data: dict[str, Any],
+        *,
+        viz_type: str,
+        engine: str,
+        row_limit: int | None,
+        order_desc: bool | None,
+    ) -> list[dict[str, Any]] | None:
+        from superset.mcp_service.chart.chart_helpers import (
+            apply_treemap_query_fields,
+            build_single_query_dict,
+        )
+
+        metrics, hierarchy = cast(
+            tuple[list[Any], list[Any]],
+            self.resolve_query_fields(form_data, viz_type),
+        )
+        query = build_single_query_dict(
+            form_data,
+            hierarchy,
+            metrics,
+            row_limit=row_limit,
+            order_desc=order_desc,
+        )
+        apply_treemap_query_fields(
+            query,
+            form_data,
+            hierarchy,
+            row_limit if row_limit is not None else form_data.get("row_limit"),
+        )
+        return [query]
+
+    def normalize_query_result(self, result: Any, form_data: Mapping[str, 
Any]) -> Any:
+        from superset.mcp_service.chart.query_result import (
+            normalize_treemap_query_result,
+        )
+
+        return normalize_treemap_query_result(result, form_data)
+
+    def compile_row_limit(self, form_data: Mapping[str, Any]) -> int:
+        try:
+            limit = int(form_data.get("row_limit") or 10)
+        except (TypeError, ValueError, OverflowError):
+            return 10
+        return min(10, limit) if limit > 0 else 10

Review Comment:
   <div>
   
   
   <div id="suggestion">
   <div id="issue"><b>Magic numbers encode limit policy</b></div>
   <div id="fix">
   
   The changed lines hardcode the business policy three times: `or 10` 
(fallback for absent/falsy `row_limit`), `return 10` (fallback for unparseable 
values), and `min(10, ...)` (cap). The cap and the fallback coincidentally 
share the value 10, but nothing distinguishes 'default when unset' from 
'maximum allowed for the compile check', so a future change to one (e.g. 
raising the cap) will likely miss the other. The sibling `preview_row_limit` 
(lines 224-230) hardcodes 100/10000 the same way. Please extract named 
constants for the fallback and the cap.
   </div>
   
   
   </div>
   
   
   
   
   <small><i>Code Review Run #bd88ea</i></small>
   </div>
   
   ---
   Should Bito avoid suggestions like this for future reviews? (<a 
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   - [ ] Yes, avoid them



##########
superset/mcp_service/chart/preview_utils.py:
##########
@@ -1257,19 +1275,129 @@ def generate_bubble_vega_lite_preview(
     )
 
 
+# Native geometries the Vega-Lite adapter cannot represent faithfully.
+_UNSUPPORTED_VEGA_GEOMETRIES: frozenset[str] = frozenset(
+    {"sankey", "sankey_v2", "radar"}
+)
+
+
+def unsupported_vega_geometry(viz_type: str) -> ChartError | None:
+    """Reject native geometries the Vega-Lite adapter cannot represent."""
+    if viz_type not in _UNSUPPORTED_VEGA_GEOMETRIES:
+        return None
+    return ChartError(
+        error=(
+            f"Vega-Lite previews do not support {viz_type} geometry. "
+            "Use Explore for the native visualization or ASCII/table for data."
+        ),
+        error_type="UnsupportedFormat",
+    )
+
+
+def generate_funnel_vega_lite_preview(
+    data: list[dict[str, Any]], form_data: dict[str, Any]
+) -> VegaLitePreview | ChartError:
+    """Render funnel stages as horizontal value bars, preserving query 
order."""
+    from superset.utils.core import get_column_name
+
+    groupby = form_data.get("groupby") or []
+    metric = metric_result_label(form_data.get("metric"))
+    if not groupby or not metric:
+        return ChartError(
+            error="Funnel requires a stage and metric", 
error_type="InvalidFormData"
+        )
+    stage = get_column_name(groupby[0])

Review Comment:
   <div>
   
   
   <div id="suggestion">
   <div id="issue"><b>Unguarded ValueError from get_column_name</b></div>
   <div id="fix">
   
   `generate_funnel_vega_lite_preview` calls `get_column_name(groupby[0])` 
unguarded. Per `superset/utils/core.py:1391`, `get_column_name` raises 
`ValueError("Missing label")` for any entry that is not a str, dict with 
label/sqlExpression, or object with column_name. `groupby` comes straight from 
`form_data` (line 1303) with no shape validation, unlike the gauge path (lines 
816-829) which validates each entry. A malformed stage entry raises ValueError 
instead of returning the `ChartError` contract; the caller's except tuple does 
catch ValueError, but the failure is then mislabeled `VegaLiteGenerationError` 
rather than `InvalidFormData`.
   </div>
   
   
   </div>
   
   
   
   
   <small><i>Code Review Run #bd88ea</i></small>
   </div>
   
   ---
   Should Bito avoid suggestions like this for future reviews? (<a 
href=https://alpha.bito.ai/home/ai-agents/review-rules>Manage Rules</a>)
   - [ ] Yes, avoid them



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