Check if entry exists in database with custom validation constraint - php

Question

So in my Symfony application I have an Entity called Post.
My Post Entity has the following properties:
post_start,post_end and many more.
ENTITY:
/**
* #ORM\Entity
* #ORM\Table(name="post")
*/
class Post
{
/**
* #var int
* #ORM\Id
* #ORM\GeneratedValue(strategy="AUTO")
* #ORM\Column(type="integer")
*/
private $id;
/**
* #var DateType
* #ORM\Column(type="date")
*/
private $post_start;
/**
* #var DateType
* #ORM\Column(type="date")
* #Assert\GreaterThanOrEqual(propertyPath="post_start")
*/
private $post_end;
.....
}
FORMTYPE:
public function buildForm(FormBuilderInterface $builder, array $options)
{
$builder->add(
'post_start',
DateType::class,
[
'widget' => 'single_text',
'format' => 'dd.MM.yyyy',
'required' => true,
'attr' => [
'class' => 'form-control input-inline datepicker',
'data-provide' => 'datepicker',
'data-date-format' => 'dd.mm.yyyy',
]
]
);
$builder->add(
'post_end',
DateType::class,
[
'widget' => 'single_text',
'format' => 'dd.MM.yyyy',
'required' => true,
'attr' => [
'class' => 'form-control input-inline datepicker',
'data-provide' => 'datepicker',
'data-date-format' => 'dd.mm.yyyy'
]
]
);
$builder->add('submit', SubmitType::class, [
'label' => 'save post',
'attr' => array('class' => 'btn btn-success')
]);
}
public function configureOptions(OptionsResolver $resolver)
{
$resolver->setDefaults([
'data_class' => Post::class
]);
}
When I submit the form, I want to check if the database already has an entry with the same startdate and enddate and of cource from the same user.
1. If YES -> Show error message
2. If NO -> Create post request.
When the entry already exists, but it's from a different user, just go ahead and create the post.
I wanted to do that with a custom validator constraint. But what happens next I have to somehow compare the data with each other
ContainsEqualDate:
/**
* #Annotation
*/
class ContainsEqualDate extends Constraint
{
public $message = 'Post request is already exists.';
public function getTargets()
{
return self::CLASS_CONSTRAINT;
}
}
ContainsEqualDateValidator:
class ContainsEqualDateValidator extends ConstraintValidator
{
/**
* #var ORMUserRepository
*/
private $userRepository;
/**
* #var ORMPostRepository
*/
private $postRepository;
/**
* #param ORMUserRepository $userRepository
* #param ORMPostRepository $postRepository
*/
public function __construct(ORMUserRepository $userRepository, ORMPostRepository $postRepository)
{
$this->userRepository = $userRepository;
$this->postRepository = $postRepository;
}
/**
* Checks if the passed value is valid.
*
* #param mixed $value The value that should be validated
* #param Constraint $constraint The constraint for the validation
*/
public function validate($value, Constraint $constraint)
{
$userId = $this->getUser();
$postExists = $this->postRepository->findBy(array(
'post_start' => $value,
'app_user_id' => $userId
));
}
/**
* #return User
*/
private function getUser(): User
{
return $this->storage->getToken()->getUser();
}
}
}

Answer 1

#Max Trui, you have not mentioned how are the User and Post entities are related in your database.
If you have UserId in Post Entity, you can do Following.
$userId = $this->userRepository->getUser()->getId();
$entryExists = ($this->postRepository->findBy(array('post_start' => $value, 'user_id' => $userId)) == null) ? true : false;
you can replace 'post_start' with the dynamic fieldname value(post_start or post_end), which you can provide from where you call validator.
If you want to check for both dates at the same time, provide both values in validator.