Add some deprecations about invalid values

src/Admin/FieldDescription.php

@@ -35,11 +35,33 @@ public function setAssociationMapping($associationMapping)
         $this->fieldName = $associationMapping['fieldName'];
     }
 
+    /**
+     * NEXT_MAJOR: Remove this method.
+     *
+     * @deprecated since sonata-project/doctrine-orm-admin-bundle 3.x and will be removed in version 4.0. Use FieldDescription::getTargetModel() instead.
+     */
     public function getTargetEntity()
+    {
+        @trigger_error(sprintf(
+            'Method %s() is deprecated since sonata-project/doctrine-orm-admin-bundle 3.x and will be removed in version 4.0.'
+            .' Use %s::getTargetModel() instead.',
+            __METHOD__,
+            __CLASS__
+        ), E_USER_DEPRECATED);
+
+        return $this->getTargetModel();
+    }
+
+    /**
+     * @final since sonata-project/doctrine-orm-admin-bundle 3.x.
+     */
+    public function getTargetModel(): ?string
     {
         if ($this->associationMapping) {
             return $this->associationMapping['targetEntity'];
         }
+
+        return null;
     }
 
     public function setFieldMapping($fieldMapping)

src/Builder/DatagridBuilder.php

@@ -158,7 +158,7 @@ public function addFilter(DatagridInterface $datagrid, $type, FieldDescriptionIn
 
         if (ModelAutocompleteFilter::class === $type) {
             $fieldDescription->mergeOption('field_options', [
-                'class' => $fieldDescription->getTargetEntity(),
+                'class' => $fieldDescription->getTargetModel(),
                 'model_manager' => $fieldDescription->getAdmin()->getModelManager(),
                 'admin_code' => $admin->getCode(),
                 'context' => 'filter',

src/Builder/FormContractor.php

@@ -113,7 +113,7 @@ public function getDefaultOptions($type, FieldDescriptionInterface $fieldDescrip
                 ));
             }
 
-            $options['class'] = $fieldDescription->getTargetEntity();
+            $options['class'] = $fieldDescription->getTargetModel();
             $options['model_manager'] = $fieldDescription->getAdmin()->getModelManager();
 
             if ($this->checkFormClass($type, [ModelAutocompleteType::class])) {
@@ -122,7 +122,7 @@ public function getDefaultOptions($type, FieldDescriptionInterface $fieldDescrip
                         'The current field `%s` is not linked to an admin.'
                         .' Please create one for the target entity: `%s`',
                         $fieldDescription->getName(),
-                        $fieldDescription->getTargetEntity()
+                        $fieldDescription->getTargetModel()
                     ));
                 }
             }
@@ -132,7 +132,7 @@ public function getDefaultOptions($type, FieldDescriptionInterface $fieldDescrip
                     'The current field `%s` is not linked to an admin.'
                     .' Please create one for the target entity : `%s`',
                     $fieldDescription->getName(),
-                    $fieldDescription->getTargetEntity()
+                    $fieldDescription->getTargetModel()
                 ));
             }
 
@@ -165,7 +165,7 @@ public function getDefaultOptions($type, FieldDescriptionInterface $fieldDescrip
                     'The current field `%s` is not linked to an admin.'
                     .' Please create one for the target entity : `%s`',
                     $fieldDescription->getName(),
-                    $fieldDescription->getTargetEntity()
+                    $fieldDescription->getTargetModel()
                 ));
             }
 

src/Model/ModelManager.php

@@ -240,7 +240,12 @@ public function lock($object, $expectedVersion)
 
     public function find($class, $id)
     {
-        if (!isset($id)) {
+        if (null === $id) {
+            @trigger_error(sprintf(
+                'Passing null as argument 1 for %s() is deprecated since sonata-project/doctrine-orm-admin-bundle 3.x and will be not allowed in version 4.0.',
+                __METHOD__
+            ), E_USER_DEPRECATED);
+
             return null;
         }
 
@@ -260,7 +265,7 @@ public function findOneBy($class, array $criteria = [])
     }
 
     /**
-     * @param string $class
+     * @param string|object $class
      *
      * @return EntityManager
      */
@@ -370,7 +375,13 @@ public function getIdentifierFieldNames($class)
 
     public function getNormalizedIdentifier($entity)
     {
+        // NEXT_MAJOR: Remove the following 2 checks and declare "object" as type for argument 1.
         if (null === $entity) {
+            @trigger_error(sprintf(
+                'Passing null as argument 1 for %s() is deprecated since sonata-project/doctrine-orm-admin-bundle 3.x and will be not allowed in version 4.0.',
+                __METHOD__
+            ), E_USER_DEPRECATED);
+
             return null;
         }
 
@@ -382,6 +393,21 @@ public function getNormalizedIdentifier($entity)
             UnitOfWork::STATE_NEW,
             UnitOfWork::STATE_REMOVED,
         ], true)) {
+            // NEXT_MAJOR: Uncomment the following exception, remove the deprecation and the return statement inside this conditional block.
+            // throw new \InvalidArgumentException(sprintf(
+            //    'Can not get the normalized identifier for %s since it is in state %u.',
+            //    ClassUtils::getClass($entity),
+            //    $this->getEntityManager($entity)->getUnitOfWork()->getEntityState($entity)
+            // ));
+
+            @trigger_error(sprintf(
+                'Passing an object which is in state %u (new) or %u (removed) as argument 1 for %s() is deprecated since sonata-project/doctrine-orm-admin-bundle 3.x'
+                .'and will be not allowed in version 4.0.',
+                UnitOfWork::STATE_NEW,
+                UnitOfWork::STATE_REMOVED,
+                __METHOD__
+            ), E_USER_DEPRECATED);
+
             return null;
         }
 
@@ -402,6 +428,16 @@ public function getNormalizedIdentifier($entity)
      */
     public function getUrlSafeIdentifier($entity)
     {
+        // NEXT_MAJOR: Remove the following check and declare "object" as type for argument 1.
+        if (!\is_object($entity)) {
+            @trigger_error(sprintf(
+                'Passing other type than object for argument 1 for %s() is deprecated since sonata-project/doctrine-orm-admin-bundle 3.x and will be not allowed in version 4.0.',
+                __METHOD__
+            ), E_USER_DEPRECATED);
+
+            return null;
+        }
+
         return $this->getNormalizedIdentifier($entity);
     }
 
@@ -447,9 +483,7 @@ public function batchDelete($class, ProxyQueryInterface $queryProxy)
 
             $entityManager->flush();
             $entityManager->clear();
-        } catch (\PDOException $e) {
-            throw new ModelManagerException('', 0, $e);
-        } catch (DBALException $e) {
+        } catch (\PDOException | DBALException $e) {
             throw new ModelManagerException('', 0, $e);
         }
     }

tests/Admin/FieldDescriptionTest.php

@@ -303,11 +303,11 @@ public function testGetTargetEntity(): void
 
         $field = new FieldDescription();
 
-        $this->assertNull($field->getTargetEntity());
+        $this->assertNull($field->getTargetModel());
 
         $field->setAssociationMapping($assocationMapping);
 
-        $this->assertSame('someValue', $field->getTargetEntity());
+        $this->assertSame('someValue', $field->getTargetModel());
     }
 
     public function testIsIdentifierFromFieldMapping(): void

tests/Builder/FormContractorTest.php

@@ -24,6 +24,7 @@
 use Sonata\AdminBundle\Form\Type\ModelListType;
 use Sonata\AdminBundle\Form\Type\ModelType;
 use Sonata\AdminBundle\Model\ModelManagerInterface;
+use Sonata\DoctrineORMAdminBundle\Admin\FieldDescription;
 use Sonata\DoctrineORMAdminBundle\Builder\FormContractor;
 use Sonata\DoctrineORMAdminBundle\Model\ModelManager;
 use Sonata\Form\Type\CollectionType;
@@ -73,9 +74,10 @@ public function testDefaultOptionsForSonataFormTypes(): void
         $admin->method('getModelManager')->willReturn($modelManager);
         $admin->method('getClass')->willReturn($modelClass);
 
-        $fieldDescription = $this->createMock(FieldDescriptionInterface::class);
+        // NEXT_MAJOR: Mock `FieldDescriptionInterface` instead and replace `getTargetEntity()` with `getTargetModel().
+        $fieldDescription = $this->createMock(FieldDescription::class);
         $fieldDescription->method('getAdmin')->willReturn($admin);
-        $fieldDescription->method('getTargetEntity')->willReturn($modelClass);
+        $fieldDescription->method('getTargetModel')->willReturn($modelClass);
         $fieldDescription->method('getAssociationAdmin')->willReturn($admin);
         $admin->method('getNewInstance')->willReturn($model);
 

tests/Model/ModelManagerTest.php

@@ -937,6 +937,13 @@ public function testRemove($exception): void
         $model->delete(new VersionedEntity());
     }
 
+    /**
+     * NEXT_MAJOR: Remove this method.
+     *
+     * @group legacy
+     *
+     * @expectedDeprecation Passing null as argument 1 for Sonata\DoctrineORMAdminBundle\Model\ModelManager::find() is deprecated since sonata-project/doctrine-orm-admin-bundle 3.x and will be not allowed in version 4.0.
+     */
     public function testFindBadId(): void
     {
         $registry = $this->createMock(ManagerRegistry::class);
@@ -973,6 +980,13 @@ public function getWrongEntities(): iterable
         yield ['sonata-project'];
     }
 
+    /**
+     * NEXT_MAJOR: Remove this method.
+     *
+     * @group legacy
+     *
+     * @expectedDeprecation Passing null as argument 1 for Sonata\DoctrineORMAdminBundle\Model\ModelManager::getNormalizedIdentifier() is deprecated since sonata-project/doctrine-orm-admin-bundle 3.x and will be not allowed in version 4.0.
+     */
     public function testGetUrlsafeIdentifierNull(): void
     {
         $registry = $this->createMock(ManagerRegistry::class);