How to eliminate this Column not found error? - symfony

Question

Originally, the entity Gut had a field reaction that contained a string. The options for reaction were hard-wired in a template. By adding an entity Reaction and changing the Gut form's reaction to an EntityType I'm now plagued with the error message
SQLSTATE[42S22]: Column not found: 1054 Unknown column 't0.reaction' in 'field list'
even though I've rewritten the Gut & Reaction entities. I've probably lost sight of the forest for the trees. What's wrong with the following?
MySQL table gut: reaction column replaced by reaction_id; reaction_id correctly created; foreign key created manually.
Error occurs with this controller method:
#[Route('/', name: 'app_gut_index', methods: ['GET'])]
public function index(GutRepository $gutRepository): Response
{
$guts = $gutRepository->findBy([], ['happened' => 'DESC']); // error thrown here
return $this->render('gut/index.html.twig', [
'guts' => $guts,
]);
}
Gut entity:
#[ORM\Id]
#[ORM\GeneratedValue]
#[ORM\Column]
private ?int $id = null;
#[ORM\Column(length: 255)]
#[ORM\ManyToOne(targetEntity: Reaction::class)]
#[ORM\JoinColumn(name: 'reaction_id', referencedColumnName: 'id')]
protected $reaction;
#[ORM\Column(length: 255, nullable: true)]
private ?string $description = null;
#[ORM\Column(name: "datetime")]
private ?\DateTime $happened = null;
public function getId(): ?int
{
return $this->id;
}
public function getReaction(): ?Reaction
{
return $this->reaction;
}
public function setReaction(?Reaction $reaction): self
{
$this->reaction = $reaction;
return $this;
}
...
}
Reaction entity:
use App\Entity\Gut;
use App\Repository\ReactionRepository;
use Doctrine\ORM\Mapping as ORM;
use Doctrine\Common\Collections\ArrayCollection;
use Doctrine\Common\Collections\Collection;
#[ORM\Entity(repositoryClass: ReactionRepository::class)]
class Reaction
{
public function __construct()
{
$this->guts = new ArrayCollection();
}
#[ORM\Id]
#[ORM\GeneratedValue]
#[ORM\Column]
private ?int $id = null;
#[ORM\Column(length: 45)]
private ?string $reaction = null;
public function getId(): ?int
{
return $this->id;
}
public function getReaction(): ?string
{
return $this->reaction;
}
public function setReaction(string $reaction): self
{
$this->reaction = $reaction;
return $this;
}
#[ORM\OneToMany(targetEntity: Gut::class, mappedBy: 'reaction')]
private $guts;
/**
* #return Collection|Product[]
*/
public function getGuts(): Collection
{
return $this->guts;
}
public function addGut($gut): self
{
$this->guts[] = $gut;
return $this;
}
public function __toString()
{
return $this->getReaction();
}
}

Answer 1

Your $reaction property should not have both ORM\Column and ORM\JoinColumn annotations at the same time.
Because of this Doctrine thinks it's a regular column so it's looking for a database field based on the variable name: $reaction -> gut.reaction.
Remove #[ORM\Column(length: 255)] then make sure that you have gut.reaction_id in your database and now it should work.
As a little side note I don't think you need name: 'reaction_id', referencedColumnName: 'id' in ORM\JoinColumn because that's how Doctrine will name them automatically anyway

Answer 2

Just couldn't let go. I eventually found a path to get the Gut and Reaction entities to play nicely together. What I did:
cloned the project
manually deleted reaction property from Gut entity; created & executed a migration
in MySQL, added back in a reaction column
used make:entity Gut to add a reaction property as ManyToOne on Reaction; made a migration
used MySQL to populate the reaction_id column from the database of the cloned project.
(Probably missed a step in here somewhere, but) gut->getReaction(),etc,
now behave as expected - in a ManyToOne relationship.