WebFeb 4, 2014 · A good approach for testing interaction with a DbContext in unit tests is to use the Entity Framework Core [In-Memory provider][1]. To test whether SaveChanges has been called, you can take advantage of the fact that the in-memory provider saves the underlying data outside of the DbContext object itself. WebJan 17, 2024 · Этот код не работает в Entity Framework 6 вообще. В Entity Framework Core — работает, но всё будет выполнено на стороне клиента и в случае, когда в базе миллионы записей — это не выход.
Should I call SaveChanges once or after each change?
WebJan 12, 2024 · In this article. Tracking behavior controls if Entity Framework Core will keep information about an entity instance in its change tracker. If an entity is tracked, any changes detected in the entity will be persisted to the database during SaveChanges().EF Core will also fix up navigation properties between the entities in a tracking query result … WebOct 5, 2016 · With each change - If you want each save to run in its own transaction and be independent of other changes then run the save in the loop or after you make a change. Note that if there is a failure later in the code then the changes that have already occurred are persisted and will not be rolled back. This also has a higher performance cost as ... jemm international
Entity Framework Db.SaveChanges() not working? - Stack Overflow
WebAug 5, 2024 · 1 Answer Sorted by: 16 According to the documentation the return value is the number of objects updated in the context: Return Value Type: System.Int32 The number of objects written to the underlying database. So your method could look like this: int returnValue = CS.SaveChanges (); return returnValue > 0 ? WebEF 6 and EF Core allow us to create or use a single transaction with multiple SaveChanges () calls using the following methods: DbContext.Database.BeginTransaction (): Creates a new transaction for the underlying database and allows us to commit or roll back changes made to the database using multiple SaveChanges method calls. WebMay 5, 2015 · First you create an instance of MyEDM, add the list myList to the table MyTable, then call SaveChanges () to persist the changes to the database. It works how you want, the records get committed, but your program cannot do anything else until the commit finishes. This can take a long time depending on what you are committing. jem minx