u

generate-schema-graph.js

@@ -488,6 +488,13 @@ function assignEdgeAnchors(edges, positions) {
     });
 
     group.forEach((edge, i) => {
+      // Self-loops: leave via top diagonals so the arc sits above the table
+      // instead of curling SE into neighboring edges.
+      if (edge.from === edge.to) {
+        tailCompass.set(edgeKey(edge), i % 2 === 0 ? 'ne' : 'nw');
+        return;
+      }
+
       const fromX = positions?.get(edge.from)?.x ?? 0;
       const toX = positions?.get(edge.to)?.x ?? fromX;
       const fromY = positions?.get(edge.from)?.y ?? 0;
@@ -641,6 +648,16 @@ function buildDot(tables, edges, positions = null) {
       attrs.push('style=dashed', 'label="inferred"');
     }
 
+    // Self-FK: leave the FK column, enter the PK — loop on the east side
+    // of those rows (e→e). Node-level ne→nw looked above the table but
+    // detached from the actual columns; column→header with :ne still dipped SE.
+    if (edge.from === edge.to) {
+      lines.push(
+        `  ${edge.from}:${sourcePort}:e -> ${edge.to}:id:e [${attrs.join(', ')}];`
+      );
+      continue;
+    }
+
     lines.push(
       `  ${edge.from}:${sourcePort}:${tail} -> ${edge.to}:${targetPort}:n [${attrs.join(', ')}];`
     );