Fix issue with callables

Author: Orbitaleio

AbstractFixture.php

@@ -166,8 +166,8 @@ private function fixtureObject($datas)
                 foreach ($datas as $field => $value) {
 
                     // If the value is a callable we execute it and inject the fixture object and the manager.
-                    if (is_callable($value, true)) {
-                        $value = $value($this, $this->manager);
+                    if ($value instanceof \Closure) {
+                        $value = $value($obj, $this, $this->manager);
                     }
 
                     if ($this->propertyAccessor) {

README.md

@@ -108,10 +108,10 @@ When you have self-referencing relationships, you may need a reference of an obj
 
 For this, first, you should set the `flushEveryXIterations` option to `1` (view below) to allow flushing on every iteration.
 
-And next, you can set a `callable` element as the value of your object so you can retrieve manually the reference from the
- injected `AbstractFixture` object as first argument.
+And next, you can set a `callable` element as the value of your object so you can interact manually with the injected object
+ as 1st argument, and the `AbstractFixture` object as 2nd argument.
 
-The `ObjectManager` is also injected as second argument in case you need to do some specific requests or query through another
+The `ObjectManager` is also injected as 3rd argument in case you need to do some specific requests or query through another
  table.
 
 Example here:
@@ -153,8 +153,10 @@ class PostFixtures extends AbstractFixture
             [
                 'id' => 2,
                 'title' => 'Second post',
-                'parent' => function(AbstractFixture $fixture, ObjectManager $manager) {
-                    return $fixture->getReference('posts-1');
+                'parent' => function(Post $object, AbstractFixture $fixture, ObjectManager $manager) {
+                    $ref = $fixture->getReference('posts-1');
+                    $object->setParent($ref); // This is often needed if you don't use cascade persist
+                    return $ref;
                 },
             ],
         ];