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create-crud-form-data-handling

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Create the CRUD form data flow layer: DataProvider (loads entity data for edit form), DataHandler (dispatches commands on create/update), error handling, and service registration. This bridges the form layer with the CQRS layer. For settings/configuration forms (a single FormDataProvider over ps_configuration, no DataHandler), use create-settings-form. Trigger: "create CRUD form data handling for {Domain}".

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create-crud-form-data-handling

Scope: this skill is for CRUD (identifiable) forms — entity add/edit pages backed by CQRS commands. Settings forms do NOT have a DataHandler — they use a single FormDataProvider over a DataConfiguration. Use create-settings-form for that pattern.

Read @.ai/Component/Forms/CONTEXT.md (decision tree, shared concerns) and @.ai/Component/Forms/CRUD.md (IdentifiableObject pattern, service folders, hooks) for the conventions this skill builds on.

1. DataProvider

Create src/Core/Form/IdentifiableObject/DataProvider/{Domain}FormDataProvider.php implementing FormDataProviderInterface:

  • getData(int $id): array — dispatch Get{Domain}ForEditing query via query bus, map the result DTO to the form's expected array structure
  • getDefaultData(): array — return sensible defaults for the create form (empty strings, null IDs, active => true)
  • Both methods must return the same array structure — the form type cannot distinguish create from edit
  • Multilingual fields: return arrays keyed by integer language ID

Reference: src/Core/Form/IdentifiableObject/DataProvider/TaxFormDataProvider.php (simple)

2. DataHandler

Create src/Core/Form/IdentifiableObject/DataHandler/{Domain}FormDataHandler.php implementing FormDataHandlerInterface:

  • create(array $data): mixed — build Add{Domain}Command from $data, dispatch via command bus, return new entity ID
  • update(int $id, array $data): void — build Edit{Domain}Command($id), call fluent setters for each field from $data, dispatch
  • Map form array keys to command setters: $command->setName($data['name'])
  • Multilingual: $command->setLocalizedNames($data['name']) where value is lang-keyed array
  • Sub-resource commands dispatched separately (see Forms/CONTEXT.md for dispatch order)

Reference: src/Core/Form/IdentifiableObject/DataHandler/TaxFormDataHandler.php (simple)

3. Error handling

  • When !$form->isValid(), re-render the form — Twig displays errors automatically via {{ form_errors(field) }}
  • Error handling conventions (server-side validation as source of truth, tab error nav) are in Forms/CONTEXT.md

4. Service registration

Register in the appropriate DI YAML file:

  • {Domain}Type — tagged with form.type (usually auto-discovered)
  • {Domain}FormDataProvider — with autowire: true, autoconfigure: true
  • {Domain}FormDataHandler — with autowire: true, autoconfigure: true
  • Service ID naming convention is in Forms/CONTEXT.md
  • Verify: php bin/console debug:container | grep {domain}_form

Rules

Conventions (DataProvider/DataHandler roles, service registration, IdentifiableObject pattern) are in Forms/CONTEXT.md. Skill-specific reminder:

  • All three services (type, provider, handler) must be registered before wiring the controller