How does the repository pattern compare to an ORM?
Repositories deal with Domain/Business objects (from application point of view), an ORM handles db objects. A business object IS NOT a db object, it first has behavior, the second is a glorified DTO, it just contains data.
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Should repositories depend on each other?
2 answers. The repository should have only one responsibility: to persist an entity type. For example, employees. If you have to remove some associated records from another repository, it seems like business logic.
What is a repository pattern?
The Repository pattern is a well-documented way of working with a data source. A repository performs the tasks of an intermediary between the domain model and data mapping layers, acting similarly to a set of domain objects in memory.
What is the role of repository pattern repositories?
The Repository Pattern Repositories are classes or components that encapsulate the logic needed to access data sources. They centralize common data access functionality, providing better maintainability and decoupling the infrastructure or technology used to access databases from the domain model layer.
What is the difference between a repository and an aggregate?
In DDD, a Repository is responsible for encapsulating all data access concerns for a given Aggregate. This comes with the responsibility of ensuring consistency during Aggregate reads and writes. And an Aggregate is a grouping of related Entities (eg Product, Store, etc.).
How are repository patterns used in the persistence layer of the infrastructure?
The Repository Pattern 1 Define one repository per aggregate. 2 Apply one root added per repository. 3 The Repository pattern makes it easy to test your application logic. 4 The difference between the Repository pattern and the pattern inherited from data access class (DAL class). 5 Repositories should not be mandatory.
What is the role of a repository in DDD?
The repository is a DDD (Domain Driven Design) concept. In DDD, a Repository is responsible for encapsulating all data access concerns for a given Aggregate. This comes with the responsibility of ensuring consistency during Aggregate reads and writes.