Add accessor property instead of code

UPGRADE-3.x.md

@@ -34,6 +34,10 @@ final class MyAdmin extends AbstractAdmin
 }
 ```
 
+### Deprecated the `Sonata\AdminBundle\AdminFieldDescription` `'code'` option.
+
+Use the `accessor` option instead.
+
 ### Deprecated `Sonata\AdminBundle\Admin\AbstractAdmin::formOptions` property.
 
 This property has been replaced by the new method `Sonata\AdminBundle\Admin\AbstractAdmin::configureFormOptions()`

docs/reference/action_list.rst

@@ -99,6 +99,16 @@ Here is an example::
             // specific properties of a relation to the entity
             ->add('image.name')
 
+            // you may also use a custom accessor
+            ->add('description1', null, [
+                'accessor' => 'description'
+            ])
+            ->add('description2', null, [
+                'accessor' => function ($subject) {
+                    return $this->customService->formatDescription($subject);
+                }
+            ])
+
             // You may also specify the actions you want to be displayed in the list
             ->add('_action', null, [
                 'actions' => [

src/Admin/BaseFieldDescription.php

@@ -18,6 +18,7 @@
 use Sonata\AdminBundle\Exception\NoValueException;
 use Symfony\Component\PropertyAccess\Exception\ExceptionInterface;
 use Symfony\Component\PropertyAccess\PropertyAccess;
+use Symfony\Component\PropertyAccess\PropertyPathInterface;
 
 /**
  * A FieldDescription hold the information about a field. A typical
@@ -36,7 +37,7 @@
  *   - name (o) : the name used (label in the form, title in the list)
  *   - link_parameters (o) : add link parameter to the related Admin class when
  *                           the Admin.generateUrl is called
- *   - code : the method name to retrieve the related value
+ *   - accessor : the method or the property path to retrieve the related value
  *   - associated_tostring : (deprecated, use associated_property option)
  *                           the method to retrieve the "string" representation
  *                           of the collection element.
@@ -418,40 +419,37 @@ public function getFieldValue($object, $fieldName)
             return $this->getFieldValue($child, substr($fieldName, $dotPos + 1));
         }
 
-        // prefer method name given in the code option
+        // NEXT_MAJOR: Remove this code.
         if ($this->getOption('code')) {
-            $getter = $this->getOption('code');
-
-            if (!method_exists($object, $getter)) {
-                @trigger_error(
-                    'Passing a non-existing method in the "code" option is deprecated'
-                    .' since sonata-project/admin-bundle 3.x and will throw an exception in 4.0.',
-                    \E_USER_DEPRECATED
-                );
+            @trigger_error(
+                'The "code" option is deprecated since sonata-project/admin-bundle 3.x.'
+                .' Use the "accessor" code instead',
+                \E_USER_DEPRECATED
+            );
 
-            // NEXT_MAJOR: Remove the deprecation and uncomment the next line.
-//                throw new \LogicException('The method "%s"() does not exist.', $getter);
-            } elseif (!\is_callable([$object, $getter])) {
+            $getter = $this->getOption('code');
+            if ($this->getOption('parameters')) {
                 @trigger_error(
-                    'Passing a non-callable method in the "code" option is deprecated'
-                    .' since sonata-project/admin-bundle 3.x and will throw an exception in 4.0.',
+                    'The option "parameters" is deprecated since sonata-project/admin-bundle 3.x and will be removed in 4.0.',
                     \E_USER_DEPRECATED
                 );
 
-            // NEXT_MAJOR: Remove the deprecation and uncomment the next line.
-//                throw new \LogicException('The method "%s"() does not have public access.', $getter);
-            } else {
-                if ($this->getOption('parameters')) {
-                    @trigger_error(
-                        'The option "parameters" is deprecated since sonata-project/admin-bundle 3.x and will be removed in 4.0.',
-                        \E_USER_DEPRECATED
-                    );
+                return $object->{$getter}(...$this->getOption('parameters'));
+            }
 
-                    return $object->{$getter}(...$this->getOption('parameters'));
-                }
+            return $object->{$getter}();
+        }
 
-                return $object->{$getter}();
-            }
+        // prefer the method or the property path given in the code option
+        $accessor = $this->getOption('accessor', $fieldName);
+        if (\is_callable($accessor)) {
+            return $accessor($object);
+        } elseif (!\is_string($accessor) && !$accessor instanceof PropertyPathInterface) {
+            throw new \TypeError(sprintf(
+                'The option "accessor" must be a string, a callable or a %s, %s given.',
+                PropertyPathInterface::class,
+                \is_object($accessor) ? 'instance of '.\get_class($accessor) : \gettype($accessor)
+            ));
         }
 
         // NEXT_MAJOR: Remove the condition code and the else part
@@ -461,7 +459,7 @@ public function getFieldValue($object, $fieldName)
                 ->getPropertyAccessor();
 
             try {
-                return $propertyAccesor->getValue($object, $fieldName);
+                return $propertyAccesor->getValue($object, $accessor);
             } catch (ExceptionInterface $exception) {
                 throw new NoValueException(
                     sprintf('Cannot access property "%s" in class "%s".', $this->getName(), \get_class($object)),

tests/Admin/BaseFieldDescriptionTest.php

@@ -186,6 +186,31 @@ public function testGetFieldValueWithNullObject(): void
         $this->assertNull($description->getFieldValue(null, 'fake'));
     }
 
+    public function testGetFieldValueWithAccessor(): void
+    {
+        $description = new FieldDescription('name', ['accessor' => 'foo']);
+        $mock = $this->getMockBuilder(\stdClass::class)->addMethods(['getFoo'])->getMock();
+        $mock->expects($this->once())->method('getFoo')->willReturn(42);
+        $this->assertSame(42, $description->getFieldValue($mock, 'fake'));
+    }
+
+    public function testGetFieldValueWithCallableAccessor(): void
+    {
+        $description = new FieldDescription('name', [
+            'accessor' => static function (object $object): int {
+                return $object->getFoo();
+            },
+        ]);
+        $mock = $this->getMockBuilder(\stdClass::class)->addMethods(['getFoo'])->getMock();
+        $mock->expects($this->once())->method('getFoo')->willReturn(42);
+        $this->assertSame(42, $description->getFieldValue($mock, 'fake'));
+    }
+
+    /**
+     * NEXT_MAJOR: Remove this test.
+     *
+     * @group legacy
+     */
     public function testGetFieldValueWithCode(): void
     {
         $description = new FieldDescription('name', ['code' => 'getFoo']);