From c5e52f7cbed1c7eceb03b1880cfb16323295d0d3 Mon Sep 17 00:00:00 2001
From: Adria Navarro <adria@budibase.com>
Date: Fri, 29 Sep 2023 14:02:45 +0200
Subject: [PATCH] Fix deleting one-2-many relationships

---
 .../src/api/controllers/row/ExternalRequest.ts       | 12 +++++++++---
 1 file changed, 9 insertions(+), 3 deletions(-)

diff --git a/packages/server/src/api/controllers/row/ExternalRequest.ts b/packages/server/src/api/controllers/row/ExternalRequest.ts
index 9ab96fba69..7a4f4c5a47 100644
--- a/packages/server/src/api/controllers/row/ExternalRequest.ts
+++ b/packages/server/src/api/controllers/row/ExternalRequest.ts
@@ -340,10 +340,16 @@ export class ExternalRequest<T extends Operation> {
       // one to many
       if (isOneSide(field)) {
         let id = row[key][0]
-        if (typeof row[key] === "string") {
-          id = decodeURIComponent(row[key]).match(/\[(.*?)\]/)?.[1]
+        if (id) {
+          if (typeof row[key] === "string") {
+            id = decodeURIComponent(row[key]).match(/\[(.*?)\]/)?.[1]
+          }
+          newRow[field.foreignKey || linkTablePrimary] = breakRowIdField(id)[0]
+        } else {
+          //
+          row[field.foreignKey || linkTablePrimary] = null
+          newRow[field.foreignKey || linkTablePrimary] = null
         }
-        newRow[field.foreignKey || linkTablePrimary] = breakRowIdField(id)[0]
       }
       // many to many
       else if (field.through) {