Form Request Validation for Filament

Use Laravel Form Request validation inside Filament — define your rules, messages, and attributes once, reuse them across API routes, controllers, and Filament UI.

Why this plugin?

Filament validates fields through dedicated methods like ->required() and ->email() on each input. That works well for simple forms, but validation logic often belongs in a central place — especially when the same rules already exist in a Form Request.

This plugin bridges that gap: attach a Form Request to your schema or table filters and its validation rules are automatically applied to the matching fields.

Features

• Form Request integration — rules(), messages(), and attributes()
• Automatic field mapping — by field name, dot notation, and wildcards (items.*.name)
• Array & pipe syntax — 'email' => ['required', 'email'] and 'email' => 'required|email'
• Context-aware — different Form Requests per page via callback (create vs. edit)
• Dynamic rules — re-resolved on every validation (required_if, Rule::unique(), etc.)
• Request simulation — route parameters and input context for Form Requests
• Smart rule merging — Form Request rules take precedence on conflicts
• Orphan rule handling — unmatched rules show a Filament notification
• getFormRequestValidated() — optional helper trait for validated data
• Filament 4 & 5 — single package, internal adapter layer

Supported contexts

Requirements

Installation

composer require occ-therapist/form-request-validation-for-filament

Auto-registers via Laravel package discovery. No manual setup required.

Quick start

1. Create a Form Request

// app/Http/Requests/StoreUserRequest.php

namespace App\Http\Requests;

use Illuminate\Foundation\Http\FormRequest;

class StoreUserRequest extends FormRequest
{
    public function rules(): array
    {
        return [
            'name' => ['required', 'string', 'max:255'],
            'email' => ['required', 'email', 'unique:users'],
        ];
    }

    public function messages(): array
    {
        return [
            'email.unique' => 'This email address is already registered.',
        ];
    }

    public function attributes(): array
    {
        return [
            'name' => 'full name',
        ];
    }
}

2. Attach it to your Filament schema

use App\Http\Requests\StoreUserRequest;
use App\Http\Requests\UpdateUserRequest;
use Filament\Resources\Pages\CreateRecord;
use Filament\Resources\Pages\EditRecord;
use Filament\Schemas\Schema;

public function form(Schema $schema): Schema
{
    return $schema
        ->components([
            TextInput::make('name'),
            TextInput::make('email'),
        ])
        ->formRequest(
            class: fn () => $this instanceof EditRecord
                ? UpdateUserRequest::class
                : StoreUserRequest::class,
        );
}

Important: Call ->formRequest() after ->components() so the validation hook is appended correctly.

Validation errors appear directly on the matching input fields.

API reference

Schema::formRequest()

$schema->formRequest(
    class: fn (Component $livewire): string => StoreUserRequest::class,
    mergeInput: fn (array $state, Component $livewire): array => $state,
);

Context selection

->formRequest(
    class: fn () => match (true) {
        $this instanceof CreateRecord => StorePostRequest::class,
        $this instanceof EditRecord => UpdatePostRequest::class,
        default => StorePostRequest::class,
    },
)

Enriching input data

->formRequest(
    class: fn () => UpdateUserRequest::class,
    mergeInput: fn (array $state) => [
        ...$state,
        'role' => $this->record?->role,
        'tenant_id' => filament()->getTenant()?->id,
    ],
)

Useful when Form Requests depend on record data, route parameters, or values not visible in the form.

Table::filtersFormRequest()

$table->filtersFormRequest(
    class: fn () => FilterCustomersRequest::class,
    mergeInput: fn (array $state, Component $livewire): array => $state,
);

Same parameters as Schema::formRequest(). Attaches validation to the table's filter form.

Usage by context

Resource pages

public function form(Schema $schema): Schema
{
    return $schema
        ->components([/* fields */])
        ->formRequest(class: fn () => StoreUserRequest::class);
}

Action modals

Action::make('invite')
    ->schema(fn (Schema $schema) => $schema
        ->components([
            TextInput::make('email'),
            TextInput::make('role'),
        ])
        ->formRequest(class: fn () => InviteUserRequest::class))
    ->action(function (array $data): void {
        // ...
    });

Wizards

One Form Request for the entire wizard — attach it to the root schema:

return $schema
    ->components([
        Wizard::make([
            Step::make('Account')->schema([
                TextInput::make('email'),
            ]),
            Step::make('Profile')->schema([
                TextInput::make('name'),
            ]),
        ]),
    ])
    ->formRequest(class: fn () => StoreUserRequest::class);

Only fields in the active step are validated per step. Use mergeInput if rules depend on data from other steps:

mergeInput: fn (array $state, Component $livewire): array => [
    ...($livewire->data ?? []),
    ...$state,
],

Relation managers

class PostsRelationManager extends RelationManager
{
    public function form(Schema $schema): Schema
    {
        return $schema
            ->components([
                TextInput::make('title'),
            ])
            ->formRequest(class: fn () => StorePostRequest::class);
    }
}

For modal actions on the table, attach formRequest() inside the action's schema callback.

Table filters

use Filament\Tables\Filters\Filter;
use Filament\Tables\Table;

public function table(Table $table): Table
{
    return $table
        ->filters([
            Filter::make('created')
                ->schema([
                    DatePicker::make('from'),
                    DatePicker::make('until'),
                ]),
        ])
        ->filtersFormRequest(class: fn () => FilterCustomersRequest::class);
}

// app/Http/Requests/FilterCustomersRequest.php
public function rules(): array
{
    return [
        'created.from' => ['nullable', 'date'],
        'created.until' => ['nullable', 'date', 'after_or_equal:created.from'],
    ];
}

Field mapping

Rules are matched to fields automatically by name — no per-field configuration needed.

State path normalization

Filament uses prefixed state paths internally. The plugin strips these automatically:

Rule merging

When a field already has Filament validation rules, both sets are merged:

TextInput::make('email')->email()->nullable()

// Form Request
'email' => ['required', 'email', 'unique:users']

Result: string, required, email, unique:users

• Form Request rules take precedence on conflicts (nullable vs. required)
• Identical rules are deduplicated
• Non-conflicting field rules are kept

Orphan rules

Rules without a matching schema field still run on submit. Failures show a Filament notification instead of an inline field error.

To show the error on a field, add a matching input (visible or hidden):

Checkbox::make('terms_accepted')->label('I accept the terms'),
// or
Hidden::make('terms_accepted'),

Accessing validated data

use OccTherapist\FormRequestValidationForFilament\Concerns\InteractsWithFormRequestValidation;

class CreateUser extends CreateRecord
{
    use InteractsWithFormRequestValidation;

    protected function handleRecordCreation(array $data): Model
    {
        $data = $this->getFormRequestValidated();

        return User::create($data);
    }
}

How it works

formRequest() / filtersFormRequest()
        │
        ▼
  Form Request resolved with simulated HTTP request
  (form state + optional mergeInput + route parameters)
        │
        ▼
  rules(), messages(), attributes() extracted
        │
        ▼
  Rules mapped to fields (exact + wildcard + state path normalization)
        │
        ▼
  Merged with existing field rules → applied on validation
        │
        ▼
  Orphan rule failures → Filament notification

Limitations

Testing

composer test

Contributing

Contributions are welcome! Please open an issue or pull request on GitHub.

License

MIT © occTherapist