What is Doctrine persist?
What is Doctrine persist?
The Doctrine Persistence project is a set of shared interfaces and functionality that the different Doctrine object mappers share. You can use these interfaces and abstract classes to build your own mapper if you don’t want to use the full data mappers provided by Doctrine.
How does Doctrine works?
How Doctrine keeps track of Objects. Doctrine uses the Identity Map pattern to track objects. Whenever you fetch an object from the database, Doctrine will keep a reference to this object inside its UnitOfWork. Since Doctrine allows composite keys the id is a sorted, serialized version of all the key columns.
What is hydration in Doctrine?
What is hydration? Doctrine ORM, like most ORMs, is performing a process called Hydration when converting database results into objects. This process usually involves reading a record from a database result and then converting the column values into an object’s properties.
How does Doctrine orm work?
Doctrine ORM is an object-relational mapper (ORM) for PHP 7.1+ that provides transparent persistence for PHP objects. It uses the Data Mapper pattern at the heart, aiming for a complete separation of your domain/business logic from the persistence in a relational database management system.
What is Cascade persist Doctrine?
Each association to another entity or a collection of entities can be configured to automatically cascade the following operations to the associated entities: persist , remove , merge , detach , refresh or all . The main use case for cascade: persist is to avoid exposing associated entities to your PHP application.
What is a repository Doctrine?
It means the place where our data can be accessed from, a repository of data. This is to distinguish it from a database as a repository does not care how its data is stored.
What is Doctrine test?
The test of non-occurrence of crucial event is part of the doctrine of frustration which is part of contract law. Doctrines can grow into a branch of law; restitution is now considered a branch of law separate to contract and tort.
What is an example of Doctrine?
An example of doctrine is the Truman Doctrine, that said the US would work to contain the Soviet Union. noun. Doctrine is defined as a principle or group of principles which are taught by a religion or political party. An example of doctrine is the teaching of the Ten Commandments in Christianity.
What is hydrator pattern?
The Hydrator pattern is a variation of the Data Transfer Object design pattern. Its design principle is quite simple: moving data from one place to another. In this illustration, we will define classes to move data from an array to an object.
What are Doctrine proxies?
A Doctrine proxy is just a wrapper that extends an entity class to provide Lazy Loading for it. By default, when you ask the Entity Manager for an entity that is associated with another entity, the associated entity won’t be loaded from the database, but wrapped into a proxy object.
What is persistent collection?
A PersistentCollection represents a collection of elements that have persistent state. Collections of entities represent only the associations (links) to those entities.
What is JPA orphanRemoval?
orphanRemoval is an entirely ORM-specific thing. It marks “child” entity to be removed when it’s no longer referenced from the “parent” entity, e.g. when you remove the child entity from the corresponding collection of the parent entity.
