Expected value of type for association field , got "double" instead

Question

I want to put a number into a NumberType field, but when I get this exception:

Expected value of type "GestionBundle\Entity\MaterialCost" for association field "GestionBundle\Entity\Intervention#$materialCost", got "double" instead.

Intervention

namespace GestionBundle\Entity; use Doctrine\ORM\Mapping as ORM; use Doctrine\ORM\Mapping\OneToOne; /** * @ORM\Entity */ class Intervention { /** * @ORM\Column(name="id", type="integer") * @ORM\Id * @ORM\GeneratedValue(strategy="AUTO") */ private $id; /** * @var string * * @ORM\Column(name="comments", type="text", nullable=true) */ private $comments; /** * One Intervention has One materialCost. * @OneToOne(targetEntity="MaterialCost", inversedBy="intervention", cascade={"persist"}) */ private $materialCost; public function __toString() { if (is_null($this->comments)) { return ''; } return $this->comments; } }

MaterialCost

namespace GestionBundle\Entity; use Doctrine\ORM\Mapping as ORM; /** * @ORM\Entity */ class MaterialCost { /* * @ORM\Column(name="id", type="integer") * @ORM\Id * @ORM\GeneratedValue(strategy="AUTO") */ private $id; /** * @var float * @ORM\Column(name="material_cost", type="float") */ private $materialCost; /** * @ORM\OneToOne(targetEntity="Intervention", mappedBy="materialCost") */ private $intervention; public function __toString() { return (string) $this->materialCost; } }

InterventionType

namespace GestionBundle\Form; use Doctrine\ORM\EntityRepository; use Symfony\Bridge\Doctrine\Form\Type\EntityType; use Symfony\Component\Form\AbstractType; use Symfony\Component\Form\Extension\Core\Type\NumberType; use Symfony\Component\Form\Extension\Core\Type\TextareaType; use Symfony\Component\Form\FormBuilderInterface; use Symfony\Component\OptionsResolver\OptionsResolver; class InterventionType extends AbstractType { public function buildForm(FormBuilderInterface $builder, array $options) { $builder->add('materialCost', NumberType::class, ['required' => true]) ->add('comments', TextareaType::class, ['required' => false]) ; } public function configureOptions(OptionsResolver $resolver) { $resolver->setDefaults(array( 'data_class' => 'GestionBundle\Entity\MaterialCost' )); } }

table name material_cost and field same material_cost, try field name change to another. — Imanali Mamadiev
– Imanali Mamadiev, Commented Oct 27, 2018 at 5:28

Peyman Mohamadpour · Accepted Answer · 2018-10-27 08:36:14Z

That is clear you should pass an object to the materialCost property of Intervention entity object, but you are giving it a number instead, which is wrong.

I think you'd better throw away the MaterialCost entity class totally and change Intervention's materialCost property mapping like this:

Intervention

/** * Intervention has a materialCost value. * @ORM/Column(type="float", name="material_cost") */ private $materialCost;

But if you are sure about having that MaterialCost entity class in place, this is the way to go:

InterventionType

namespace GestionBundle\Form; use Doctrine\ORM\EntityRepository; use GestionBundle\Entity\Intervention; use GestionBundle\Entity\MaterialCost; use Symfony\Bridge\Doctrine\Form\Type\EntityType; use Symfony\Component\Form\AbstractType; use Symfony\Component\Form\Extension\Core\Type\TextareaType; use Symfony\Component\Form\FormBuilderInterface; use Symfony\Component\OptionsResolver\OptionsResolver; class InterventionType extends AbstractType { public function buildForm(FormBuilderInterface $builder, array $options) { $builder ->add('materialCost', EntityType::class, [ 'required' => true, 'class' => MaterialCost::class, 'choice_label' => 'materialCost', ]) ->add('comments', TextareaType::class, ['required' => false]) ; } public function configureOptions(OptionsResolver $resolver) { $resolver->setDefaults(array( 'data_class' => Intervention::class )); } }

This way, you may choose some instance of MaterialCost and assing it to an Intervention. If you want to be able to put a new number, and at the same time, create a MaterialCost object, inside InterventionType form, you are after an other method called prototype.

Consider reading the How to Embed a Collection of Forms for that.

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