![]() ![]() Plugins SHOULD NOT change the state of an intercepted object (Intercepted object is $subject). Plugins SHOULD NOT be added to data objects.Ĥ.5. Plugins SHOULD NOT be used within own module.Ĥ.3. ![]() Around-plugins SHOULD only be used when behavior of an original method is supposed to be substituted in certain scenarios.Ĥ.2. All modular Presentation layer DI settings SHOULD be stored in /etc//di.xml. All modular DI settings (except for Presentation layer configuration) SHOULD be stored in /etc/di.xml.ģ.4. The app/etc/di.xml file MUST contain only framework-level Dependency Injection (DI) settings.ģ.3. There SHOULD be no circular dependencies between objects.ģ.2. Strategy SHOULD be used when there are multiple algorithms for performing an operation. In this case, you can create a ConfigReaderInterface with a composite implementation - ConfigReaderComposite, and configure particular readers as children of a composite reader.Ģ.17.3. ![]() You need to read configuration from different sources (like database or filesystem) and want to make the reading process configurable: allow extensions to add more configuration sources. No additional public initialization methods are allowed. An object MUST be ready for use after instantiation. Object decomposition MUST follow the SOLID principles.Ģ.2.1. PHP interfaces MAY have this declaration. All updated PHP files SHOULD have strict type mode enabled. All new PHP files MUST have strict type mode enabled by starting with declare(strict_types=1). Type hints for scalar arguments SHOULD be used.ġ.3.1. Explicit return types MUST BE declared on functions.ġ.3. Function arguments SHOULD NOT be modified.ġ.2. We strongly believe that new technical initiatives should follow these recommendations, and the existing code should be improved to meet them. These guidelines came from many years of hard work, experience, and discussions. Magento core developers use this document as a reference during code reviews some rules have corresponding code checks in the Magento static tests. They are supplied to the class via the same di.xml file.This document lists the fundamental coding and application design principles that guide Magento 2 developer team members. In practice is a bit more complicated because configuration files are involved also (di.xml), some dependencies might be interfaces which cannot be instantiated, but this factory method supplies a class that implements that interface when your class gets instantiated, based on the contents of the same di.xml file. If they are, they are provided to the constructor, if not, the dependency class is instantiated in the same way as the current class you are trying to instantiate. When trying to instantiate a class, it checks if it's dependencies are already present in the DIC. Magento 2 also has a dependency injection container (DIC) which is basically a big array with the classes that get instantiated. When used, the class is instantiated via a factory method that reads the signature of the class constructor, to check what dependencies are required. When building a class, all the dependencies are specified in the constructor. In this example, the category model depends on the url rewrites instance. The dependencies are provided to the class. And there are 2 ways the connection can be made. So we can say, a class depends on other classes. ![]() Inside a project, classes interact with each other. In other words, creating static files and caching them has a greater performance impact than generating them using the static files creation tool (Static view files are served from cache only.) Errors are logged to the file system and are never displayed to the user Default mode - Errors are logged to the file reports at server, and never shown to a user - A symlink to a static view file is published to the pub/static directory for each requested file -Default mode is not optimized for a production environment, primarily because of the adverse performance impact of static files being dynamically generated rather than materialized. Developer mode In developer mode: -A symlink to a static view file is published to the pub/static directory for each requested file Uncaught exceptions display in the browser -System logging in var/report is verbose -An exception is thrown in the error handler, rather than being logged -An exception is thrown when an event subscriber cannot be invoked - As side note it's good to keep in mind that the /index.php file is used when running as developer mode and /pub/index.php is used when running as production mode Production mode In production mode: Static view files are not materialized, and URLs for them are composed on the fly without going through the fallback mechanism. ![]()
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