Merge pull request #586 from neo4j-labs/fix/fixNoNodeOnGraph

Removing Orphan Rels error on Graph

Author: mariusconjeaud

src/chart/graph/util/RecordUtils.ts

@@ -122,6 +122,12 @@ function extractGraphEntitiesFromField(
   }
 }
 
+const isValidLink = (link, nodes) => {
+  if (nodes[link.source] == null || nodes[link.target] == null) {
+    return false;
+  }
+  return true;
+};
 export function buildGraphVisualizationObjectFromRecords(
   records: any[], // Neo4jRecord[],
   nodes: Record<string, any>[],
@@ -162,6 +168,7 @@ export function buildGraphVisualizationObjectFromRecords(
       );
     });
   });
+
   // Assign proper curvatures and colors to relationships.
   // Assigning curvature is needed for pairs of nodes that have multiple relationships between them, or self-loops.
   const linksList = Object.values(links).map((linkArray) => {
@@ -176,6 +183,12 @@ export function buildGraphVisualizationObjectFromRecords(
     });
   });
 
+  linksList.forEach((link, idx, object) => {
+    if (!isValidLink(link[0], nodes)) {
+      object.splice(idx, 1);
+    }
+  });
+
   // Assign proper colors to nodes.
   const totalColors = colorScheme ? colorScheme.length : 0;
   const nodeLabelsList = fields.map((e) => e[0]);