CreateScheduleTemplateType.php

<?php

class CreateScheduleTemplateType extends AbstractType
{
    public function setDefaultOptions(OptionsResolverInterface $resolver)
    {
        $resolver->setDefaults(
            [
                'required'          => true,
                'type'              => 'Melin\ModulePlannerBundle\Form\Type\ScheduleTemplate',
                'csrf_protection'   => false,
                'cascade_validation' => true
            ]
        );
    }

    public function getName()
    {
        return '';
    }

    public function getParent()
    {
        return 'collection';
    }
}

Request Body

[
    {
        "weekday": 10,
        "time": "09:00",
        "time_slot_length": 180,
        "time_slot_type_id": "00000000-0000-1200-a001-000000000001"
    },
    {
        "weekday": 8,
        "time": "12:00",
        "time_slot_length": 60,
        "time_slot_type_id": "00000000-0000-1200-a002-000000000002"
    }
]

ScheduleTemplateType.php

<?php

namespace Melin\ModulePlannerBundle\Form\Type;

use Symfony\Component\Form\AbstractType;
use Symfony\Component\Form\FormBuilder;
use Symfony\Component\Form\FormBuilderInterface;
use Symfony\Component\OptionsResolver\OptionsResolverInterface;
use Symfony\Component\Validator\Constraints as Assert;
use Symfony\Component\Validator\Constraints\Range;
use JMS\TranslationBundle\Annotation\Ignore;

class CreateScheduleTemplateType extends AbstractType
{
    public function buildForm(FormBuilderInterface $builder, array $options)
    {
        $builder
            ->add(
                'weekday',
                'integer',
                [
                    'required' => true,
                    'constraints' => [
                        new Assert\Range([
                            'min'               => 1,
                            'max'               => 7,
                            'minMessage'    => 'Weekday must be a number between 1 (Monday) and 7 (Sunday). {{ value }} was given.',
                            'maxMessage'    => 'Weekday must be a number between 1 (Monday) and 7 (Sunday). {{ value }} was given.',
                        ])
                    ]
                ]
            )
            ->add(
                'time',
                'text',
                [
                    'required' => true,
                    'constraints' => [
                        new Assert\Regex([
                            'pattern' => '/^[0-2][0-9]:[0-5][0-9]/',
                            'match'   => true,
                            'message' => 'Time is not the right format (HH:mm)',
                        ])
                    ]
                ]
            )
            ->add(
                'time_slot_length',
                'integer',
                [
                    'required' => true,
                    'constraints' => [new Assert\NotBlank()],
                    'property_path' => 'timeSlotLength'
                ]
            )
            ->add(
                'time_slot_type_id',
                'uuid',
                [
                    'required' => true,
                    'constraints' => [new Assert\NotBlank()],
                   'property_path' => 'timeSlotTypeId'
                ]
            );
    }

    public function setDefaultOptions(OptionsResolverInterface $resolver)
    {
        $resolver->setDefaults(
            array(
                'data_class'       => 'Melin\ModulePlannerBundle\Model\ScheduleTemplate',
                'csrf_protection'  => false
            )
        );
    }

    public function getName()
    {
        return 'schedule_template';
    }
}