Check if foreign key has an action

diff --git a/wcfsetup/install/files/lib/system/database/table/DatabaseTable.class.php b/wcfsetup/install/files/lib/system/database/table/DatabaseTable.class.php
index bc6c9c3f173542ed542285aaa0966d6b8a5769ba..9ef900887de78721de4c92fbc698decfeaa10f96 100644 (file)
--- a/wcfsetup/install/files/lib/system/database/table/DatabaseTable.class.php
+++ b/wcfsetup/install/files/lib/system/database/table/DatabaseTable.class.php
@@ -102,6 +102,10 @@ class DatabaseTable {
                                throw new \InvalidArgumentException("Duplicate foreign key with name '{$foreignKey->getName()}'.");
                        }
                        
+                       if ($foreignKey->getOnDelete() === null && $foreignKey->getOnUpdate() === null) {
+                               throw new \InvalidArgumentException("Missing action for foreign key '{$foreignKey->getName()}'.");
+                       }
+                       
                        $this->foreignKeys[$foreignKey->getName()] = $foreignKey;
                }