Allow removing options that EntityType can't accept

src/Autocomplete/CHANGELOG.md

@@ -1,5 +1,10 @@
 # CHANGELOG
 
+## Next
+
+-   Allow not passing custom options to the nested `EntityType` by passing a list through another custom option
+    called `autocomplete_excluded_options` - #420
+
 ## 2.9.0
 
 -   Add support for symfony/asset-mapper

src/Autocomplete/src/Form/AutocompleteEntityTypeSubscriber.php

@@ -43,9 +43,8 @@ public function preSetData(FormEvent $event)
         // pass to AutocompleteChoiceTypeExtension
         $options['autocomplete'] = true;
         $options['autocomplete_url'] = $this->autocompleteUrl;
-        unset($options['searchable_fields'], $options['security'], $options['filter_query']);
 
-        $form->add('autocomplete', EntityType::class, $options);
+        $form->add('autocomplete', EntityType::class, $this->withoutExcludedOptions($options));
     }
 
     public function preSubmit(FormEvent $event)
@@ -104,4 +103,29 @@ public static function getSubscribedEvents(): array
             FormEvents::PRE_SUBMIT => 'preSubmit',
         ];
     }
+
+    /**
+     * If you create a custom Form Type based on {@link ParentEntityAutocompleteType} and make it accept any non-standard
+     * options, these options need to be removed from the $options array passed to EntityType because it doesn't
+     * accept those custom options.
+     *
+     * @see https://github.com/symfony/ux/issues/420
+     */
+    private function withoutExcludedOptions(array $options): array
+    {
+        $optionBlacklist = [
+            // Options added by ParentEntityAutocompleteType
+            'searchable_fields', 'security', 'filter_query', 'property',
+            // Any other options that were added to the custom AutocompleteType that EntityType doesn't understand
+            ...$options['autocomplete_excluded_options'],
+            // The list of blacklisted options itself (EntityType doesn't understand that either!)
+            'autocomplete_excluded_options',
+        ];
+
+        foreach ($optionBlacklist as $option) {
+            unset($options[$option]);
+        }
+
+        return $options;
+    }
 }

src/Autocomplete/src/Form/ParentEntityAutocompleteType.php

@@ -82,6 +82,8 @@ public function configureOptions(OptionsResolver $resolver)
             'security' => false,
             // set the max results number that a query on automatic endpoint return.
             'max_results' => 10,
+            /* @see AutocompleteEntityTypeSubscriber::withoutExcludedOptions() */
+            'autocomplete_excluded_options' => [],
         ]);
 
         $resolver->setRequired(['class']);