From fb908efe8ff2d435f962152d84ab383bfc323488 Mon Sep 17 00:00:00 2001
From: Rijk van Zanten <rijkvanzanten@me.com>
Date: Wed, 9 Jun 2021 17:02:47 -0400
Subject: [PATCH] Cleanup one_allowed_collections field on collection delete
 (#6167)

Fixes #6161
---
 api/src/services/collections.ts | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/api/src/services/collections.ts b/api/src/services/collections.ts
index 0c136e6306..6ed9c097df 100644
--- a/api/src/services/collections.ts
+++ b/api/src/services/collections.ts
@@ -399,6 +399,19 @@ export class CollectionsService {
 				}
 			}
 
+			const m2aRelationsThatIncludeThisCollection = this.schema.relations.filter((relation) => {
+				return relation.meta?.one_allowed_collections?.includes(collectionKey);
+			});
+
+			for (const relation of m2aRelationsThatIncludeThisCollection) {
+				const newAllowedCollections = relation
+					.meta!.one_allowed_collections!.filter((collection) => collectionKey !== collection)
+					.join(',');
+				await trx('directus_relations')
+					.update({ one_allowed_collections: newAllowedCollections })
+					.where({ id: relation.meta!.id });
+			}
+
 			await collectionItemsService.deleteOne(collectionKey);
 			await trx.schema.dropTable(collectionKey);
 		});