Symfony UniqueInCollection Constraint

A Symfony validation constraint that ensures uniqueness of specific fields within a collection. This constraint validates that the specified field(s) have unique values across all items in a collection, making it perfect for preventing duplicate entries based on certain properties.

🚀 Features

• Field Uniqueness: Validate uniqueness of single or multiple fields within collections
• Composite Uniqueness: Support for checking uniqueness across multiple field combinations
• Symfony Integration: Native Symfony Validator component integration
• PHP 8+ Attributes: Modern attribute-based constraint definition
• 100% Test Coverage: Comprehensive unit and functional test suite

📋 Requirements

• PHP 8.2 or higher
• Symfony Validator Component 7.3+
• Symfony PropertyAccess Component 7.3+

📦 Installation

Install the constraint via Composer:

composer require gryfoss/symfony-unique-in-collection-constraint

🛠️ Usage

Basic Usage with PHP Attributes

You can use the constraint directly on collection properties in your entities:

<?php

use GryfOSS\SymfonyUniqueInCollectionConstraint\UniqueInCollection;

class Team
{
    #[UniqueInCollection('email')]
    private array $members = [];

    // Constructor, getters, setters...
}

Advanced Usage Examples

Single Field Uniqueness

<?php

use GryfOSS\SymfonyUniqueInCollectionConstraint\UniqueInCollection;

class Company
{
    #[UniqueInCollection('email')]
    private array $employees = [];
}

// Usage
$employees = [
    ['name' => 'John Doe', 'email' => 'john@company.com'],
    ['name' => 'Jane Smith', 'email' => 'jane@company.com'],
    ['name' => 'Bob Wilson', 'email' => 'john@company.com'], // ❌ Duplicate email!
];

Multiple Field Uniqueness (Composite)

<?php

use GryfOSS\SymfonyUniqueInCollectionConstraint\UniqueInCollection;

class ProductCatalog
{
    #[UniqueInCollection(['category', 'sku'])]
    private array $products = [];
}

// Usage
$products = [
    ['name' => 'Laptop', 'category' => 'electronics', 'sku' => 'LAP001'],
    ['name' => 'Phone', 'category' => 'electronics', 'sku' => 'PHN001'],
    ['name' => 'Tablet', 'category' => 'electronics', 'sku' => 'LAP001'], // ❌ Same category+sku!
];

Manual Validation

<?php

use GryfOSS\SymfonyUniqueInCollectionConstraint\UniqueInCollection;
use Symfony\Component\Validator\Validation;

$validator = Validation::createValidator();

$data = [
    ['id' => 1, 'code' => 'ABC123'],
    ['id' => 2, 'code' => 'DEF456'],
    ['id' => 3, 'code' => 'ABC123'], // Duplicate code
];

$constraint = new UniqueInCollection('code');
$violations = $validator->validate($data, $constraint);

if (count($violations) > 0) {
    foreach ($violations as $violation) {
        echo $violation->getMessage(); // "Must be unique within collection."
    }
}

🧪 Running Tests

This project includes both unit tests and functional tests to ensure reliability:

Run All Tests

# Run the complete test suite (unit + functional)
./scripts/run-all-tests.sh

Run Unit Tests Only

# Basic unit tests
./vendor/bin/phpunit

# Unit tests with coverage report
./vendor/bin/phpunit --coverage-html coverage/

Run Unit Tests with Coverage Check

# Ensures 100% test coverage
./scripts/check-coverage.sh

Run Functional Tests (Behat)

cd tests/functional
composer install
./vendor/bin/behat

Test Structure

• Unit Tests (tests/unit/): Test individual components and constraint logic
• Functional Tests (tests/functional/): End-to-end Behat scenarios testing real-world usage
• Coverage: Maintained at 100% to ensure reliability

🤝 Contributing

We welcome contributions to improve this constraint! Here's how you can help:

Reporting Issues

• 🐛 Bug Reports: Create an issue with detailed reproduction steps
• 💡 Feature Requests: Submit an enhancement request with your use case
• 📚 Documentation: Help improve documentation and examples

Pull Requests

1. Fork the repository
2. Create a feature branch: git checkout -b feature/amazing-feature
3. Write tests for your changes
4. Ensure all tests pass: ./scripts/run-all-tests.sh
5. Commit your changes: git commit -m 'Add amazing feature'
6. Push to your branch: git push origin feature/amazing-feature
7. Submit a pull request

Development Guidelines

• Maintain 100% test coverage
• Follow PSR-12 coding standards
• Add comprehensive documentation for new features
• Ensure backward compatibility when possible
• Write clear commit messages

📄 License

This project is licensed under the MIT License - see the LICENSE file for details.

👨‍💻 Author

IDCT Bartosz Pachołek

• Email: bartosz+github@idct.tech
• GitHub: @GryfOSS

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Made with ❤️ for the Symfony community