WebJan 4, 2024 · What you are asking is quite simple in EF Core. If you don't want EF Core change tracker operation to process the related data, set the EntityEntry.State rather than calling DbContext / DbSet methods like Attach, Add, Update, Remove etc.. This behavior is different from EF6 where methods and setting state are doing one and the same, and is … WebJul 24, 2024 · Execute multiple EF commands to pull back the same list of parent objects, but each time Include()-ing different child object types. EF will hook up the related objects it's already pulled from the db, apparently. Use the EF+ library which seems it can do something like AsSplitQuery()
How can I use EF to add multiple child entities to an object …
WebJun 13, 2024 · Commands to write to the database – Lines 17 and 18. Line 17: the Add method tells EF Core that a new book with its relationships (in this case, just a Review), needs to be written to the database. Line 18: In this case the SaveChange method creates new rows in Books and Review tables in the database. WebMar 14, 2024 · The second preview of Entity Framework Core (EF Core) 8 is available on NuGet today! Basic information. EF Core 8, or just EF8, is the successor to EF Core 7, and is scheduled for release in November 2024, at the same time as .NET 8. ... where each item can have a parent and/or children. Examples of such data are: An organizational … dr andrew lucas
Loading Related Data - EF Core Microsoft Learn
WebMar 4, 2014 · Essentially: If the parent entity is already loaded into context, it's usually best to add the new entity to the collection of navigation properties (Children in your case, but any foreign key). If the parent is not loaded and you know it's id, populate the foreign key field and save it just as you always did. Share. WebMay 27, 2024 · EF Core (similar to EF6) is designed for load, modify, save flow. It requires you to load the collection from db, determine the CUD operations, apply them to change tracker, then save. Note that update is not done with Update method or setting the entity state to Modified , which are for "forced update" you are talking about, but with ... WebFeb 20, 2014 · I usually set the first child's Id to -1, then -2 for the second child, and so on. This will cause EF to save the children and the key will automatically be updated due to the Identity running on the database because -1 and -2 are not valid identity values. However, this will cause great pain if you have a 3rd level or beyond. dr andrew luck