Unit of Work pattern implements single transaction for multiple repository objects, making sure that all INSERT/UPDATE/DELETE statements are executed in order and atomically. SpecificRepository class inherits from GenericRepository abstract class and implements any specific methods from ISpecificRepository.ISpecificRepository interface should have methods required for specific use case (if any).All shared functionality is implemented in this class. GenericRepository abstract class implements IGenericRepository interface.
This is a complex process due to impedance mismatch effect which better handled with ORM’s, but this is not our use case. So in this instance, repository is actually related not to one database but to one aggregate root which can map to one or more tables. That means that one repository object is related to one table in database.ĭDD repository pattern works with aggregate root object and persists it one or more tables or if event sourcing is used as series of events in event store. Generic repository is simple contract defined as an interface on per object basis. When talking about Repository pattern it is important to distinguish between DDD implementation of repository and generic repositorypattern. Similar repository, as presented here, is in use in production CQRS/ES system and works quite well.Įven though use case depicted here is quite “unique”, I think implementation of this repository can be applied for most of the relational base database systems, with minimum refactoring. When searching around the web I found various implementations none of which was satisfactory - mostly due to having to manually enter table names/field names, too complex implementations with Unit of work etc.
#Dapper orm how to#
In this blog I will explain what repository pattern is and how to implement it using reflection in C#. Implementing Repository pattern in Dapper can be done in many ways.
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