- Added ArrayOf attributes and DatasetFill/DatasetPull events. ArrayCollection is also working with ArrayOf attributes

src/Attribute/Property/Join.php

@@ -33,4 +33,19 @@ class Join implements ResettablePropertyInterface {
 
         return $this->foreignKey;
     }
+
+    public function isOneToOne() : bool
+    {
+        return true;
+    }
+
+    public function isOneToMany() : bool
+    {
+        return false;
+    }
+
+    public function isManyToMany() : bool
+    {
+        return false;
+    }
 }