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formssymfonyvalidationassert
Dassef
Dassef

Reputation: 53

Symfony 4 -- Form min max validation

How to be sure that min < max before validation

here my entity 

/**
 * @var int
 *
 * @ORM\Column(name="min", type="integer", nullable=true)
 */
private $min;

/**
 * @var int
 *
 * @ORM\Column(name="max", type="integer", nullable=true)
 */
private $max;

in the form :

  ->add('min',               NumberType::class,array('required' => false))
  ->add('max',               NumberType::class,array('required' => false))

it's an option and min must be inferior to max before validating the form

How can i verify and send a message to the user to change his form if it's not correct.

Thanks

Upvotes: 3

Views: 8126

Answers (3)

svgrafov
svgrafov

Reputation: 2014

Luckily, there is a better solution for Symfony >3.4.

GreaterThan, GreaterThanOrEqual, LessThan, LessThanOrEqual validation constraints come with propertyPath option which allows to specify object property to compare with.

I am quite surprised that it was not implemented earlier.

/**
 * @Assert\LessThanOrEqual(
 *     message="Too high",
 *     propertyPath="maxSubscribers")
 * @Assert\LessThanOrEqual(
 *     message="Too high",
 *     value=100000000)
 */
private $min;

/**
 * @Assert\GreaterThanOrEqual(
 *     message="Too low",
 *     value=1)
 * @Assert\LessThanOrEqual(
 *     message="Too high",
 *     value=100000000)
 */
private $max;

Upvotes: 2

Imanali Mamadiev
Imanali Mamadiev

Reputation: 2654

You can write min and max validation in form for .ex:

->add('ordering', NumberType::class, array(
          'attr' => array('min' => 1, 'max' => 100)
     ))

Also in Entity:

// src/Entity/YourFoo.php
namespace App\Entity;

use Symfony\Component\Validator\Constraints as Assert;

class YourFoo
{
    /**
     * @Assert\Range(
     *      min = 120,
     *      max = 180,
     *      minMessage = "You must be at least {{ limit }}cm tall to enter",
     *      maxMessage = "You cannot be taller than {{ limit }}cm to enter"
     * )
     */
     protected $fooNumber;

     ...............................


}

Upvotes: 0

dbrumann
dbrumann

Reputation: 17166

There are multiple ways to approach this that I can think of.

  1. The Callback-Constraint was already mentioned in the comments.
  2. Creating your own custom constraint
  3. Using the Expression-constraint

Probably the latter is the easiest one. Basically it looks something like this:

/**
 * @Assert\Type("integer")
 * @Assert\Expression("this.getMin() <= this.getMax()")
 */
private $min;

/**
 * @Assert\Type("integer")
 */
private $max;

See: https://symfony.com/doc/current/reference/constraints/Expression.html

Creating a custom constraint is even more work than the Callback-constraint, so I won't go into details for that, but you can find a good article in the documentation.

Upvotes: 3

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