rusackas commented on code in PR #40912:
URL: https://github.com/apache/superset/pull/40912#discussion_r3383044854


##########
superset-frontend/src/features/lineage/LineageView.tsx:
##########
@@ -0,0 +1,728 @@
+/**
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+import { FC, useMemo, useState, useCallback } from 'react';
+import { t } from '@apache-superset/core/translation';
+import { styled, useTheme } from '@apache-superset/core/theme';
+import { Empty, Loading } from '@superset-ui/core/components';
+import { Button } from '@superset-ui/core/components';
+import { ResourceStatus } from 'src/hooks/apiResources/apiResources';
+import type { Resource } from 'src/hooks/apiResources/apiResources';
+import type {
+  DatasetLineage,
+  ChartLineage,
+  DashboardLineage,
+  ChartEntity,
+  DashboardEntity,
+  DatasetEntity,
+  DatabaseEntity,
+} from 'src/hooks/apiResources/lineage';
+import Echart from 
'../../../plugins/plugin-chart-echarts/src/components/Echart';
+import type { EChartsCoreOption } from 'echarts/core';
+
+const LineageContainer = styled.div`
+  display: flex;
+  flex-direction: column;
+  width: 100%;
+  height: 100%;
+`;
+
+const Legend = styled.div`
+  ${({ theme }) => `
+    display: flex;
+    justify-content: center;
+    align-items: center;
+    gap: ${theme.sizeUnit * 4}px;
+    padding: ${theme.sizeUnit * 3}px;
+    background-color: ${theme.colorBgLayout};
+    border-bottom: 1px solid ${theme.colorBorder};
+  `}
+`;
+
+const LegendItem = styled.div<{ color: string }>`
+  ${({ theme, color }) => `
+    display: flex;
+    align-items: center;
+    gap: ${theme.sizeUnit * 2}px;
+    font-size: ${theme.fontSizeSM}px;
+    color: ${theme.colorText};
+
+    &::before {
+      content: '';
+      width: 12px;
+      height: 12px;
+      border-radius: 2px;
+      background-color: ${color};
+    }
+  `}
+`;
+
+const DetailsPanel = styled.div`
+  ${({ theme }) => `
+    padding: ${theme.sizeUnit * 4}px;
+    background-color: ${theme.colorBgLayout};
+    border-top: 1px solid ${theme.colorBorder};
+    min-height: 120px;
+  `}
+`;
+
+const DetailsPanelHeader = styled.div`
+  ${({ theme }) => `
+    display: flex;
+    justify-content: space-between;
+    align-items: center;
+    margin-bottom: ${theme.sizeUnit * 3}px;
+  `}
+`;
+
+const DetailsPanelActions = styled.div`
+  ${({ theme }) => `
+    display: flex;
+    gap: ${theme.sizeUnit * 2}px;
+  `}
+`;
+
+const DetailsPanelTitle = styled.h4`
+  ${({ theme }) => `
+    margin: 0;
+    font-size: ${theme.fontSizeLG}px;
+    font-weight: ${theme.fontWeightStrong};
+    color: ${theme.colorText};
+  `}
+`;
+
+const DetailsPanelContent = styled.div`
+  ${({ theme }) => `
+    display: flex;
+    flex-direction: column;
+    gap: ${theme.sizeUnit * 2}px;
+  `}
+`;
+
+const DetailRow = styled.div`
+  ${({ theme }) => `
+    display: flex;
+    gap: ${theme.sizeUnit * 2}px;
+    font-size: ${theme.fontSizeSM}px;
+    color: ${theme.colorText};
+  `}
+`;
+
+const DetailLabel = styled.span`
+  ${({ theme }) => `
+    font-weight: ${theme.fontWeightStrong};
+    min-width: 100px;
+  `}
+`;
+
+const DetailValue = styled.span`
+  ${({ theme }) => `
+    color: ${theme.colorTextSecondary};
+  `}
+`;
+
+type NodeType = 'database' | 'dataset' | 'chart' | 'dashboard';
+
+type NodeDetails = {
+  name: string;
+  type: NodeType;
+  id?: number;
+  additionalInfo?: Record<string, any>;
+};
+
+// Build a stable, unique graph identity for a node so that entities sharing 
the
+// same display name (e.g. two charts with identical titles) never collapse 
into
+// a single Sankey node. The human-readable name is kept separately as the 
label.
+const nodeKey = (type: NodeType, id?: number, name?: string): string =>
+  id != null ? `${type}:${id}` : `${type}:${name ?? ''}`;
+
+type LineageViewProps = {
+  lineageResource:
+    | Resource<DatasetLineage>
+    | Resource<ChartLineage>
+    | Resource<DashboardLineage>;
+  entityType: 'dataset' | 'chart' | 'dashboard';
+};
+
+const LineageView: FC<LineageViewProps> = ({ lineageResource, entityType }) => 
{
+  const theme = useTheme();
+  const [selectedNode, setSelectedNode] = useState<NodeDetails | null>(null);
+
+  // Create a mapping of node names to their details
+  const nodeDetailsMap = useMemo(() => {
+    if (
+      lineageResource.status !== ResourceStatus.Complete ||
+      !lineageResource.result
+    ) {
+      return new Map<string, NodeDetails>();
+    }
+
+    const data = lineageResource.result;
+    const map = new Map<string, NodeDetails>();
+
+    if (entityType === 'dataset' && 'dataset' in data) {
+      const { dataset, upstream, downstream } = data as DatasetLineage;
+
+      // Add current dataset
+      map.set(nodeKey('dataset', dataset.id, dataset.name), {
+        name: dataset.name,
+        type: 'dataset',
+        id: dataset.id,
+        additionalInfo: {
+          schema: dataset.schema,
+          table_name: dataset.table_name,
+          database_name: dataset.database_name,
+        },
+      });
+
+      // Add upstream database
+      if (upstream?.database) {
+        map.set(
+          nodeKey(
+            'database',
+            upstream.database.id,
+            upstream.database.database_name,
+          ),
+          {
+            name: upstream.database.database_name,
+            type: 'database',
+            id: upstream.database.id,
+          },
+        );
+      }
+
+      // Add downstream charts
+      if (downstream?.charts?.result) {
+        downstream.charts.result.forEach((chart: ChartEntity) => {
+          map.set(nodeKey('chart', chart.id, chart.slice_name), {
+            name: chart.slice_name,
+            type: 'chart',
+            id: chart.id,
+            additionalInfo: {
+              viz_type: chart.viz_type,
+            },
+          });
+        });
+      }
+
+      // Add downstream dashboards
+      if (downstream?.dashboards?.result) {
+        downstream.dashboards.result.forEach((dashboard: DashboardEntity) => {
+          map.set(nodeKey('dashboard', dashboard.id, dashboard.title), {
+            name: dashboard.title,
+            type: 'dashboard',
+            id: dashboard.id,
+            additionalInfo: {
+              slug: dashboard.slug,
+            },
+          });
+        });
+      }
+    } else if (entityType === 'chart' && 'chart' in data) {
+      const { chart, upstream, downstream } = data as ChartLineage;
+
+      // Add current chart
+      map.set(nodeKey('chart', chart.id, chart.slice_name), {
+        name: chart.slice_name,
+        type: 'chart',
+        id: chart.id,
+        additionalInfo: {
+          viz_type: chart.viz_type,
+        },
+      });
+
+      // Add upstream dataset
+      if (upstream?.dataset) {
+        map.set(
+          nodeKey('dataset', upstream.dataset.id, upstream.dataset.name),
+          {
+            name: upstream.dataset.name,
+            type: 'dataset',
+            id: upstream.dataset.id,
+            additionalInfo: {
+              schema: upstream.dataset.schema,
+              table_name: upstream.dataset.table_name,
+            },
+          },
+        );
+      }
+
+      // Add upstream database
+      if (upstream?.database) {
+        map.set(
+          nodeKey(
+            'database',
+            upstream.database.id,
+            upstream.database.database_name,
+          ),
+          {
+            name: upstream.database.database_name,
+            type: 'database',
+            id: upstream.database.id,
+          },
+        );
+      }
+
+      // Add downstream dashboards
+      if (downstream?.dashboards?.result) {
+        downstream.dashboards.result.forEach((dashboard: DashboardEntity) => {
+          map.set(nodeKey('dashboard', dashboard.id, dashboard.title), {
+            name: dashboard.title,
+            type: 'dashboard',
+            id: dashboard.id,
+            additionalInfo: {
+              slug: dashboard.slug,
+            },
+          });
+        });
+      }
+    } else if (entityType === 'dashboard' && 'dashboard' in data) {
+      const { dashboard, upstream } = data as DashboardLineage;
+
+      // Add current dashboard
+      map.set(nodeKey('dashboard', dashboard.id, dashboard.title), {
+        name: dashboard.title,
+        type: 'dashboard',
+        id: dashboard.id,
+        additionalInfo: {
+          slug: dashboard.slug,
+        },
+      });
+
+      // Add upstream charts
+      if (upstream?.charts?.result) {
+        upstream.charts.result.forEach((chart: ChartEntity) => {
+          map.set(nodeKey('chart', chart.id, chart.slice_name), {
+            name: chart.slice_name,
+            type: 'chart',
+            id: chart.id,
+            additionalInfo: {
+              viz_type: chart.viz_type,
+            },
+          });
+        });
+      }
+
+      // Add upstream datasets
+      if (upstream?.datasets?.result) {
+        upstream.datasets.result.forEach((dataset: DatasetEntity) => {
+          map.set(nodeKey('dataset', dataset.id, dataset.name), {
+            name: dataset.name,
+            type: 'dataset',
+            id: dataset.id,
+            additionalInfo: {
+              schema: dataset.schema,
+              table_name: dataset.table_name,
+            },
+          });
+        });
+      }
+
+      // Add upstream databases
+      if (upstream?.databases?.result) {
+        upstream.databases.result.forEach((database: DatabaseEntity) => {
+          map.set(nodeKey('database', database.id, database.database_name), {
+            name: database.database_name,
+            type: 'database',
+            id: database.id,
+          });
+        });
+      }
+    }
+
+    return map;
+  }, [lineageResource, entityType]);
+
+  // Handle node click
+  const handleNodeClick = useCallback(
+    (params: any) => {
+      if (params.dataType === 'node') {
+        const nodeName = params.name;
+        const nodeDetails = nodeDetailsMap.get(nodeName);
+        if (nodeDetails) {
+          setSelectedNode(nodeDetails);
+        }
+      }
+      // Always stop event propagation to prevent tooltip issues
+      if (params.event) {
+        params.event.stop();
+      }
+    },
+    [nodeDetailsMap],
+  );
+
+  const echartOptions: EChartsCoreOption | null = useMemo(() => {
+    if (
+      lineageResource.status !== ResourceStatus.Complete ||
+      !lineageResource.result
+    ) {
+      return null;
+    }
+
+    const data = lineageResource.result;

Review Comment:
   Good call — added unit tests for the lineage API hooks in 
`superset-frontend/src/hooks/apiResources/lineage.test.ts`, covering the 
success path, the result-unwrapping, network-error handling, the per-entity 
endpoint construction, and the skip/empty-id guard.



##########
superset/dashboards/api.py:
##########
@@ -524,6 +527,126 @@ def get(
         )
         return self.response(200, result=result)
 
+    @expose("/<id_or_slug>/lineage", methods=("GET",))
+    @protect()
+    @safe
+    @statsd_metrics
+    @with_dashboard

Review Comment:
   In this codebase the chart/dataset/dashboard REST APIs use the `@safe` 
decorator for API exception handling rather than `@handle_api_exception` — e.g. 
the adjacent `get` endpoint in this same file. The `lineage` endpoint already 
carries `@safe` (right after `@protect()`), so it is consistent with the 
surrounding endpoints. No change needed here.



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