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-rw-r--r--engine/lib/access.php4
1 files changed, 3 insertions, 1 deletions
diff --git a/engine/lib/access.php b/engine/lib/access.php
index dba1e1ec6..6be252c6a 100644
--- a/engine/lib/access.php
+++ b/engine/lib/access.php
@@ -671,8 +671,10 @@ function add_user_to_access_collection($user_guid, $collection_id) {
return false;
}
+ // if someone tries to insert the same data twice, we do a no-op on duplicate key
$q = "INSERT INTO {$CONFIG->dbprefix}access_collection_membership
- SET access_collection_id = {$collection_id}, user_guid = {$user_guid}";
+ SET access_collection_id = $collection_id, user_guid = $user_guid
+ ON DUPLICATE KEY UPDATE user_guid = user_guid";
$result = insert_data($q);
return $result !== false;