add-model

name	add-model
description	Add a Doctrine entity as a Sylius Resource in a Sylius application
argument-hint	[ModelName]
allowed-tools	AskUserQuestion, Bash, Read, Edit, Write, Glob, Grep

Add a Model

Ask the user for the ModelName if not provided, the list of fields with their types, and any relations to other resources.

Where to place the files

Group by domain like Sylius-Standard (src/Entity/Product/, src/Entity/Customer/):

• Name starts with an existing resource ({Parent}Image, {Parent}Translation, …) → src/Entity/{Parent}/
• Otherwise → own folder src/Entity/{ModelName}/

1. Create the interface

src/Entity/{ModelName}/{ModelName}Interface.php:

<?php

declare(strict_types=1);

namespace App\Entity\{ModelName};

use Sylius\Resource\Model\ResourceInterface;

interface {ModelName}Interface extends ResourceInterface
{
    public function getId(): ?int;
    // declare the getter (and setter if mutable) for every field and relation added in step 2
}

2. Create the entity

src/Entity/{ModelName}/{ModelName}.php:

<?php

declare(strict_types=1);

namespace App\Entity\{ModelName};

use Doctrine\ORM\Mapping as ORM;

#[ORM\Entity]
#[ORM\Table(name: 'app_{model_snake}')]
class {ModelName} implements {ModelName}Interface
{
    #[ORM\Id]
    #[ORM\GeneratedValue]
    #[ORM\Column(type: 'integer')]
    protected ?int $id = null;

    public function getId(): ?int
    {
        return $this->id;
    }

    // add your fields here
}

For fields that require validation, add Symfony constraints directly on the property:

use Symfony\Component\Validator\Constraints as Assert;

#[Assert\NotBlank]
#[Assert\Length(max: 255)]
#[ORM\Column(length: 255)]
private ?string $title = null;

For relations to another resource in your app, always use the target's interface as targetEntity — Sylius's ResolveTargetEntityListener resolves it at runtime from the interface: key in the resource config. In forms, EntityType does not go through this listener — pass the concrete class or use /sylius-app:add-autocomplete.

ManyToOne — {ModelName} belongs to one {RelatedModel}:

#[ORM\ManyToOne(targetEntity: {RelatedModel}Interface::class)]
private ?{RelatedModel}Interface ${related_model} = null;

OneToMany (inverse side) — {ModelName} has many {RelatedModel}. Initialize the collection in the constructor. Requires the owning side ({RelatedModel} entity) to declare a matching ManyToOne field named {model_snake}:

use Doctrine\Common\Collections\ArrayCollection;
use Doctrine\Common\Collections\Collection;

#[ORM\OneToMany(mappedBy: '{model_snake}', targetEntity: {RelatedModel}Interface::class)]
private Collection ${related_model_plural};

public function __construct()
{
    $this->{related_model_plural} = new ArrayCollection();
}

Add the canonical Sylius adder/remover pair so LiveCollectionType and other form types sync the inverse side correctly:

public function add{RelatedModel}({RelatedModel}Interface ${related_model}): void
{
    if (!$this->{related_model_plural}->contains(${related_model})) {
        $this->{related_model_plural}->add(${related_model});
        ${related_model}->set{ModelName}($this);
    }
}

public function remove{RelatedModel}({RelatedModel}Interface ${related_model}): void
{
    if ($this->{related_model_plural}->removeElement(${related_model})) {
        ${related_model}->set{ModelName}(null);
    }
}

Same adder/remover pattern for ManyToMany — omit the inverse sync call (no owning-side field to update on the other entity).

ManyToMany:

#[ORM\ManyToMany(targetEntity: {RelatedModel}Interface::class)]
private Collection ${related_model_plural};

public function __construct()
{
    $this->{related_model_plural} = new ArrayCollection();
}

To relate to a Sylius core entity (e.g. attach data to Product), use its interface (Sylius\Component\Core\Model\ProductInterface) as targetEntity. The interface resolves at runtime to whichever class is configured — yours if you customized it via /sylius-app:extends-model, otherwise the Sylius default.

3. Register as Sylius Resource

Append to config/packages/sylius_resource.yaml under sylius_resource.resources (Sylius-Standard ships this file with a #app.book: commented hint):

sylius_resource:
    resources:
        app.{model_snake}:
            driver: doctrine/orm
            classes:
                model: App\Entity\{ModelName}\{ModelName}
                interface: App\Entity\{ModelName}\{ModelName}Interface

4. Generate and apply the migration

bin/console doctrine:migrations:diff

Always review the generated migration before applying. doctrine:migrations:diff captures every difference between mapping and DB — including pre-existing schema drift unrelated to your model (e.g. ALTER TABLE messenger_messages ... from a Sylius update never migrated locally). The migration should only contain CREATE TABLE app_{model_snake} + its indexes/FKs.

If unrelated SQL is present, investigate the drift before merging. Either generate a separate baseline migration to absorb it, or trim the diff and document why.

Then apply:

bin/console doctrine:migrations:migrate --no-interaction

5. Clear cache

bin/console cache:clear

6. Verify

• bin/console sylius:debug:resource 'App\Entity\{ModelName}\{ModelName}' prints the resource metadata (alias app.{model_snake}, model + interface classes)
• bin/console doctrine:query:sql "DESCRIBE app_{model_snake}" lists the expected columns (id, plus user fields)

---

Next steps

1. /sylius-app:add-form to add an admin form
2. /sylius-app:add-translatable-model if the model needs translations
3. /sylius-app:add-grid, then /sylius-app:add-routes, then /sylius-app:add-menu