entity-framework-core

I need to delete multiple rows from a database using Entity Framework Core. This code does NOT work: foreach (var item in items) { myCollection.Remove(item); } because I get an error "InvalidOperationException: Collection was modified; enumeration operation may not execute" after the first object. In other words, .Remove removes only one object. Entity Framework Core does NOT have .RemoveRange , so I have no idea how to perform this operation. In order to preserve maximum compatibility with the various database providers, I would prefer NOT to call context.Database.ExecuteSqlCommand("delete

I am developing asp.net 5 (now called ASP.NET Core) on linux. But I cannot connect between EF7 (now called EF Core) and Mysql server. Please tell me any solution that you knew. Thanks. All available providers are listed at https://docs.microsoft.com/en-us/ef/core/providers/ . At time of writing, there are 3 different EF Core providers, two community versions and one official version. UPDATE Sept 15, 2016 MySQL released the first version of an official provider for EF Core. https://www.nuget.org/packages/MySql.Data.EntityFrameworkCore There is also a community version of a MySQL provider https:

I'm using this MSDN Tutorial to run in VS2015 the command PM> Add-Migration MyFirstMigration -context BloggingContext that ran yesterday successfully but today it's giving the following error that is also pointed out by other users here . I even deleted the Migrations folder from solution explorer and the corresponding db from SQL Express 2014 on Win 8.1 but same error. Even if I run Add-Migration MyFirstMigration I get same error: Add-Migration : The term 'Add-Migration' is not recognized as the name of a cmdlet, function, script file, or operable program. Check the spelling of the name, or

One thing that I am finding really tedious with the way EFCore handles many-to-many relationships is updating an entities joined collections. It is a frequent requirement that a viewmodel comes from frontend with a new list of nested entities and I have to write a method for each nested entity that works out what needs to be removed, what needs to be added and then do the removes and adds. Sometimes an entity has multiple many-to-many relationships and I have to write out pretty much the same code for each collection. I think a generic method could be used here to stop me repeating myself but

I understood by watching this video with Rowan Miller https://channel9.msdn.com/Series/Whats-New-with-ASPNET-5/06 (at minute 22) that the way of configuring Entity Framework Core (previously known as EF7) into an ASP.NET Core 1.0 app (previously known as ASP.NET 5) in Startup.cs is as follows: public void ConfigureServices(IServiceCollection services) { //Entity Framework 7 scoped per request?? services.AddEntityFramework() .AddSqlServer() .AddDbContext<MyDbContext>(options => { options .UseSqlServer(Configuration["Data:DefaultConnection:ConnectionString"]); }); //MVC 6 services.AddMvc(); }

Been looking every where for a tutorial or something. I've been trying to implement my old generic repository pattern for MVC5 into a new MVC6 project. I set up 3 class library's .Core , .Data and .Service , However there's an issue with IDBset , seems my intellisense doesn't like it, I tried to add System.Data and Entity framework 6 but without any luck (cant find it...confusing). After roaming google I decided to ask here, is there a tutorial with the correct way or can someone throw up a very simple MVC6 Generic Repository pattern? I have a feeling the Old method of doing it may have