From 9a8fdbce84aca11490daddefefb4ead12af44dcc Mon Sep 17 00:00:00 2001
From: Huy Bui <huy03081999@gmail.com>
Date: Sat, 27 Jul 2024 13:15:26 +0700
Subject: [PATCH] fix: duplicated relationship

---
 src/components/EditorCanvas/Canvas.jsx | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/src/components/EditorCanvas/Canvas.jsx b/src/components/EditorCanvas/Canvas.jsx
index d16b392..b057d29 100644
--- a/src/components/EditorCanvas/Canvas.jsx
+++ b/src/components/EditorCanvas/Canvas.jsx
@@ -411,6 +411,24 @@ export default function Canvas() {
     )
       return;
 
+    const existRelationship = relationships.find((r) => {
+      const startToEnd =
+        r.startTableId === linkingLine.startTableId &&
+        r.startFieldId === linkingLine.startFieldId &&
+        r.endTableId === hoveredTable.tableId &&
+        r.endFieldId === hoveredTable.field;
+      const endToStart =
+        r.startTableId === hoveredTable.tableId &&
+        r.startFieldId === hoveredTable.field &&
+        r.endTableId === linkingLine.startTableId &&
+        r.endFieldId === linkingLine.startFieldId;
+
+      return startToEnd || endToStart;
+    });
+    if (existRelationship) {
+      return;
+    }
+
     const newRelationship = {
       ...linkingLine,
       endTableId: hoveredTable.tableId,