Questions tagged [repository-pattern]
Pattern that aims to manage a set of persistent objects or a database by providing an interface that emulates a collection.
140 questions
1 vote
3 answers
214 views
How to handle overfetching efficiently with repository pattern in large applications?
I'm working on a large Typescript project in NodeJS with Prisma, where we have dozens of domain entities—some with 30+ fields and complex relations. We're using the repository pattern to abstract data ...
- 21
3 votes
2 answers
2k views
What data type should a repository return?
In domain driven design, repositories are created for aggregate roots only. Does this mean that all repository methods should return an instance or a collection of the aggregate root for which the ...
- 795
2 votes
2 answers
328 views
Clean Architecture Chapter 8 - Financial Data Mapper
I’m studying Clean Architecture, and I came across a technical concept in the diagram from chapter 8. In this chapter, the author states that the Financial Data Mapper implements the Financial Data ...
- 79
0 votes
1 answer
150 views
Where to put getOrSave responsibility?
I have many repeated parts of service logic which just fetches object if it exists or returns a newly saved one. I want to move it from service because it just clutters up the logic. But I do not ...
- 235
3 votes
1 answer
220 views
How to structure repositories for a small number of entities?
I am working on a project implemented in DDD style, and I use Repository architecture pattern to persist domain changes. I have multiple roles in domain layer, and that's what raises my question - how ...
1 vote
4 answers
512 views
How to Access the Private State of an Entity in the Save Method of its Repository
Consider the domain entity, Order, which can be persisted by the OrderRepository. Orders maintain state that is stored in the database. However, it does not expose all of it directly. That is, parts ...
- 71
2 votes
1 answer
384 views
How to properly use Data Transfer Objects
I feel something is wrong with my approach handling MVP and the Repository Pattern. I'm making an album winform app just to practice MVP, crud and the Repos. Pattern. First some code. The model: using ...
- 193
3 votes
3 answers
2k views
How to implement Repository if only part of Entity properties are needed?
From many articles and answers on DDD Repository pattern, I got the feeling that a Repository should only CURD an Entity (Aggregate Root) as a whole. Following this convention, we always need to query ...
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