symfony · javiereguiluz · May 23, 2022 · May 5, 2022
@@ -14,7 +14,8 @@ Validation Constraints Reference
    constraints/Type
 
    constraints/Email
-   constraints/ExpressionLanguageSyntax
+   constraints/ExpressionLanguageSyntax (deprecated)
+   constraints/ExpressionSyntax
    constraints/Length
    constraints/Url
    constraints/Regex

@@ -1,6 +1,11 @@
 ExpressionLanguageSyntax
 ========================
 
+.. deprecated:: 6.1
+
+    This constraint is deprecated since Symfony 6.1.
+    Use the``ExpressionSyntax`` constraint instead.
+
 This constraint checks that the value is valid as an `ExpressionLanguage`_
 expression.
 

@@ -0,0 +1,147 @@
+ExpressionSyntax
+================
+
+This constraint checks that the value is valid as an `ExpressionLanguage`_
+expression.
+
+.. info:: 6.1
+
+    This constraint is deprecated since Symfony 6.1.
+    Use the``ExpressionSyntax`` constraint instead.
+
+==========  ===================================================================
+Applies to  :ref:`property or method <validation-property-target>`
+Class       :class:`Symfony\\Component\\Validator\\Constraints\\ExpressionSyntax`
+Validator   :class:`Symfony\\Component\\Validator\\Constraints\\ExpressionSyntaxValidator`
+==========  ===================================================================
+
+Basic Usage
+-----------
+
+The following constraints ensure that:
+
+* the ``promotion`` property stores a value which is valid as an
+  ExpressionLanguage expression;
+* the ``shippingOptions`` property also ensures that the expression only uses
+  certain variables.
+
+.. configuration-block::
+
+    .. code-block:: php-annotations
+
+        // src/Entity/Order.php
+        namespace App\Entity;
+
+        use Symfony\Component\Validator\Constraints as Assert;
+
+        class Order
+        {
+            /**
+             * @Assert\ExpressionSyntax
+             */
+            protected $promotion;
+
+            /**
+             * @Assert\ExpressionSyntax(
+             *     allowedVariables={"user", "shipping_centers"}
+             * )
+             */
+            protected $shippingOptions;
+        }
+
+    .. code-block:: php-attributes
+
+        // src/Entity/Order.php
+        namespace App\Entity;
+
+        use Symfony\Component\Validator\Constraints as Assert;
+
+        class Order
+        {
+            #[Assert\ExpressionSyntax]
+            protected $promotion;
+
+            #[Assert\ExpressionSyntax(
+                allowedVariables: ['user', 'shipping_centers'],
            )]
+            protected $shippingOptions;
+        }
+
+    .. code-block:: yaml
+
+        # config/validator/validation.yaml
+        App\Entity\Order:
+            properties:
+                promotion:
+                    - ExpressionSyntax: ~
+                shippingOptions:
+                    - ExpressionSyntax:
+                        allowedVariables: ['user', 'shipping_centers']
+
+    .. code-block:: xml
+
+        <!-- config/validator/validation.xml -->
+        <?xml version="1.0" encoding="UTF-8" ?>
+        <constraint-mapping xmlns="http://symfony.com/schema/dic/constraint-mapping"
+            xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+            xsi:schemaLocation="http://symfony.com/schema/dic/constraint-mapping https://symfony.com/schema/dic/constraint-mapping/constraint-mapping-1.0.xsd">
+
+            <class name="App\Entity\Order">
+                <property name="promotion">
+                    <constraint name="ExpressionSyntax"/>
+                </property>
+                <property name="shippingOptions">
+                    <constraint name="ExpressionSyntax">
+                        <option name="allowedVariables">
+                            <value>user</value>
+                            <value>shipping_centers</value>
+                        </option>
+                    </constraint>
+                </property>
+            </class>
+        </constraint-mapping>
+
+    .. code-block:: php
+
+        // src/Entity/Student.php
+        namespace App\Entity;
+
+        use Symfony\Component\Validator\Constraints as Assert;
+        use Symfony\Component\Validator\Mapping\ClassMetadata;
+
+        class Order
+        {
+            public static function loadValidatorMetadata(ClassMetadata $metadata)
+            {
+                $metadata->addPropertyConstraint('promotion', new Assert\ExpressionSyntax());
+
+                $metadata->addPropertyConstraint('shippingOptions', new Assert\ExpressionSyntax([
+                    'allowedVariables' => ['user', 'shipping_centers'],
+                ]));
+            }
+        }
+
+Options
+-------
+
+allowedVariables
+~~~~~~~~~~~~~~~~
+
+**type**: ``array`` or ``null`` **default**: ``null``
+
+If this option is defined, the expression can only use the variables whose names
+are included in this option. Unset this option or set its value to ``null`` to
+allow any variables.
+
+.. include:: /reference/constraints/_groups-option.rst.inc
+
+message
+~~~~~~~
+
+**type**: ``string`` **default**: ``This value should be a valid expression.``
+
+This is the message displayed when the validation fails.
+
+.. include:: /reference/constraints/_payload-option.rst.inc
+
+.. _`ExpressionLanguage`: https://symfony.com/components/ExpressionLanguage