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46 lines
733 B
Markdown
46 lines
733 B
Markdown
---
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date: 20201109
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id: cafa5c65-3517-4e04-b724-a7e3b467142d
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title: ExpressionLanguage Constraint
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---
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# Syntax
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``` php
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use Symfony\Component\Validator\Constraints as Assert;
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class Event
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{
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/** @Assert\DateTime() */
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private $startDate;
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/**
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* @Assert\DateTime()
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* @Assert\Expression("value > this.startDate")
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*/
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private $endDate;
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// ...
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}
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```
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In [Symfony 4.0](20201109140137-symfony_4_0) a new `propertyPath` option
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was added:
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``` php
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use Symfony\Component\Validator\Constraints as Assert;
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class Event
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{
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/** @Assert\DateTime() */
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private $startDate;
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/**
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* @Assert\DateTime()
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* @Assert\GreaterThan(propertyPath="startDate")
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*/
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private $endDate;
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// ...
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}
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```
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