IT developer remarks

In Twig exist "constant" function that returns constant value, but if you set "class" in first parameter and object in second parameter, then function returns the fully qualified class name of an object.  So we can use it in our case and compare it on class name that we want to check like "instanceof". Example: {% if constant('class', app.user) == 'User' %}{% endif %} Or with namespace: {% if constant('class', app.user) == 'EntityBundle\\Entity\\User' %}{% endif %}

 If you've decided to start learning a PHP framework this year, or from scratch, and can't decide which one to choose, here's a selection of the most popular: Laravel - 302,403,373 downloads Symfony - 78,291,128 downloads Cakephp - 12,444,302 downloads Codeigniter4 - 1,720,925 downloads Codeigniter - 1,617,412 downloads by downloads in January 2024 All info from Packagist.org So, to choose Laravel in this year, you obtain much more possibilities to find a job. 

If you have separated ajax table sheet with data and filters, sometimes, you need to keep this filtered data between requests. In my case, I needed to be able to download file in CSV format, after choosing all necessary filters in table. So, it is possible to store SQL query in client Session after applying all filters and receive data from DB via DQL. To store DQL in session: $query = $this->createQueryBuilder('i')->select('COUNT(i)'); $_SESSION['query'] = $query->getQuery()->getDQL(); $_SESSION['query_params'] = $query->getQuery()->getParameters(); To get data from DB: $data = $this->createQuery($_SESSION['query'])->setParameters($_SESSION['query_params'])->getResult();

Today, I faced with a bug: Custom Field entity has a RelId column relates to two different entities: Product and Bundle. Set RelId into Custom Field directly connected to Product, but not exist in Bundle table. After Entity Manager flush(), I got an error: RelId can not be null. How come that RelId field became null, when flushing. After debugging, I realized, Doctrine checks if exist this connected RelId field in Bundle table. If not, Doctrine just set RelId to null and go on. So, we need not to set RelId directly, but using entity, like Product or Bundle, in my case. Here's a simplified example using annotations: Let's assume you have three entities: SourceEntity, TargetEntity, and RelationEntity. RelationEntity will act as the join table, holding the relationship between SourceEntity and TargetEntity. // SourceEntity.php use Doctrine\ORM\Mapping as ORM; /** * @ORM\Entity */ class SourceEntity { // ... other properties /** * @ORM\OneTo...

Old-Style Annotations: Written as comments, typically using PHPDoc syntax (/** ... */). Annotations are interpreted by external tools or libraries. Doctrine ORM interprets annotations to configure database mappings. Limited flexibility in terms of syntax and available metadata types. May lack type safety and validation. PHP 8 Attributes: Written using the #[...] syntax. Introduced as a language feature in PHP 8 for adding metadata directly to code. Provides a more structured and standardized way of associating metadata with classes, methods, or properties. Attributes are a built-in language feature, eliminating the need for external interpretation in many cases. Attributes are directly handled by the PHP runtime. Offers better type safety and validation compared to traditional annotations. Supports the use of PHP's native types and expressions within attribute values. Attributes support namespacing, allowing for better organization and...

If you want to add subquery into where clause, you need to create subquery firstly: $sub = $this->_em->createQueryBuilder()             ->select('cf.id')             ->from(CustomField::class, 'cf')             ->where('cf.type = :type AND cf.fieldName = :fieldName'); After that you can use this subquery as DQL: $this->_em->createQueryBuilder()->expr()->in('cfv.fieldId', $sub->getDQL()) In that case we use it as IN condition. But it is just example. And finally it will look like that: $this->createQueryBuilder('cfv')             ->update(CustomFieldValue::class, 'cfv')             ->set('cfv.value', ':value')             ->where($this->_em->createQueryBuilder()->expr()->in('cfv.fieldId', $sub->getDQL()))           ...

 A circular reference in Symfony typically occurs when there's a loop in the dependency injection graph. It means that one service depends on another service, which in turn depends on the first one, creating an infinite loop. Check Your Service Definitions: Review your service definitions in the services.yaml or other configuration files. Look for any circular dependencies. A circular reference often occurs when Service A depends on Service B, and Service B depends on Service A. Use Setter Injection: Instead of injecting dependencies through the constructor, use setter injection. In Symfony, you can use setter injection by creating setter methods in your services and injecting dependencies through these methods after the service is instantiated. Lazy Loading: Consider using lazy loading for dependencies. Symfony allows lazy loading of services, which means that the actual instantiation of a service is delayed until it's actually used. You can enable lazy loading for a service b...

If you need to generate URL out of controller, you need to create you own Route with necessary path. $route = new \Symfony\Component\Routing\Route('/calculator/new'); And add this route to Route Collection: $routes = new \Symfony\Component\Routing\RouteCollection(); $routes->add('calculator_new', $route); After that you can generate URL: $generator = new \Symfony\Component\Routing\Generator\UrlGenerator($routes, new \Symfony\Component\Routing\RequestContext()); $url = $generator->generate('calculator_new'); This returns: "/calculator/new" If you need to add any query parameters: $url = $generator->generate('calculator_new', ['width' => 100]); This will return "/calculator/new?width=100" as the generated URL, including the specified query parameter. In summary, by creating a route, adding it to a collection, and using a URL generator, you can easily generate URLs and include additional query parameters...

If you want to logout locked or banned User automatically, you need, first of all, add new Listener with onKernelRequest(RequestEvent $event) method. Just FYI, this method Symfony calls every time on every request, so, be careful to use this method. It can shoot yourself in the foot. For example: class SecurityUserListener { public function onKernelRequest(RequestEvent $event) { } } After that, we need to check our User on status: banned or locked (what you need). For this we need to inject Token Storage in class constructor. Token Storage can return User. So, lets do it: class SecurityUserListener { public function __construct(private TokenStorageInterface $tokenStorage) { } public function onKernelRequest(RequestEvent $event) { $user = $this->tokenStorage->getToken()?->getUser(); } } Now, you can examine the user object's status. If it meets your criteria, set the current token to null (indicating no user in the token anymore) and...

A Facade Service is employed to obtain any service through a public static method, as opposed to injecting it via the constructor. For example (facade service): Facade::getEntityManager(); In this example, the getEntityManager method is accessed directly from the Facade, providing a simplified and centralized way to obtain the EntityManager service. For example (injecting service): class test { public function __construct(private EntityManagerInterface $em) {} } In this case, the EntityManager service is injected into the constructor of the Test class. While this is a valid approach, Facade Services offer an alternative method for obtaining services. To add creating facade possibility, first of all, need to set Service Container to Bundle boot() method. For example: class CoreBundle extends Bundle { private static $serviceContainer; public function boot() { parent::boot(); self::$serviceContainer = $this->container; } } Now, we have Se...