From Data Container Array to Data Container Class

Define data container configuration with classes/services instead of plain PHP files.

Why?

• Real Dependency Injection
• Don't deal with DCA files and wild names because of the prefixes like tl_vendor_bundle_tablename. Just define your table names one time and forget about it later. See advanced usage below.
• Define private callbacks and logic methods in class scope like in Contao 2 or 3.
• Define whatever you need, it's your class.
• It's still possible to override definitions with dca files.

Install

via Composer

composer require tastaturberuf/contao-datacontainer-bundle

Basic usage

Define a class and implement DataContainerInterface.

<?php

declare(strict_types=1);

namespace App;

use Contao\DC_Table;
use Tastaturberuf\ContaoDataContainerBundle\DataContainerInterface;


class DataContainer implements DataContainerInterface
{

    // return the table name
    public function getTable(): string
    {
        return 'tl_data_container';
    }

    // return the DCA config
    public function getConfig(): array
    {
        return [
            'config' => [
                'container' => DC_Table::class
            ]
            // ...
        ];
    }

}

Advanced usage

<?php

declare(strict_types=1);

namespace App;

use Ausi\SlugGenerator\SlugGenerator;
use Contao\CoreBundle\DependencyInjection\Attribute\AsCallback;
use Contao\CoreBundle\Intl\Countries;
use Contao\DC_Table;
use Contao\Model;
use Symfony\Component\DependencyInjection\Attribute\Autowire;
use Tastaturberuf\ContaoDataContainerBundle\DataContainerInterface;


// App/Contao/Model/DataContainerModel.php
class DataContainerModel extends Model
{
    // Every time you need the table name use this public constant!
    public const TABLE = 'tl_data_container';

    protected static $strTable = self::TABLE;
    
    //...
}

// App/Contao/DataContainer/MyDataContainer.php
class MyDataContainer implements DataContainerInterface
{
    /**
     * Now you can use real dependency injection in DCC 
     */
    public function __construct(
        private readonly SlugGenerator $slugGenerator,
        private readonly Countries $countries,
        #[Autowire(param: 'contao.image.valid_extensions')] // since Contao 5 / Symfony 6 
        privare readonly string $validImages
    ) {}

    public function getTable(): string
    {
        // DRY: Use the model constant here
        return DataContainerModel::TABLE;
    }

    /**
     * Return the same array you would do in `dca/tl_i_hate_remember_prefixes_table.php`
     */
    public function getConfig(): array
    {
        return [
            'config' => [
                'container' => DC_Table::class
            ]
            // ...
            'fields' => [
                'alias' =>  [
                    'inputType' => 'text',
                    'save_callback' => $this->saveCallback(...)
                    //...
                ],
                'country' => [
                    'inputType' => 'select'
                    //...
                ]
            ]
        ];
    }
    
    
    /**
     * You can define private callbacks
     */
    private function saveCallback(string $value): string
    {
        return $this->slugGenerator->generate($value);
    }
    
    /**
     * You can define public callbacks (and may use the TABLE constant from the model)
     */
    #[AsCallback(DataContainerModel::TABLE, 'fields.country.options')]
    public function publicCallback(): array 
    {
        return $this->countries->getCountries();
    }

}

Maintainer

Tastaturberuf with ♥ and Contao