entity-framework-core

I need to store a large amount of user data in a database where every user already has an ID as a key. However, these users all out of a larger pool of users, therefore, the ID does not increment and cannot be automatically generated. I need to be able to manually set the ID. Is there an easy way to do this? I've made some tests and this seems to work for me on EF 7.0.0 rc1-final: modelBuilder.Entity<Foo>().HasKey(x => x.Id); modelBuilder.Entity<Foo>().Property(x => x.Id).ValueGeneratedNever(); My test code: static void Main(string[] args) { using (var db = new FooContext()) { var myFoo = new

I have a simple ASP.NET Core 2.0 + Entity Framework Core project: I have an entity called ApplicationUser , which extends Microsoft.AspNet.Identity.IdentityUser , and the ApplicationUser has a collection of another entity called Books . However, when I try to read the collection of Books from the ApplicationUser after retrieving it from UserManager: ApplicationUser user = await _userManager.GetUserAsync(User); return user.Books; I get an empty collection. If I do this instead: ApplicationUser user = await _userManager.GetUserAsync(User); return _context.Users.Include(d => d.Books)

I have the following table : Indicators(A INT, B INT, C INT, D INT, TimeInsertedLocal DateTime) . And I have the EF Core mapping entity that maps to this table. I need to translate this SQL query to ef core Linq equivalent query . SELECT A, B, C, D, TimeInsertedLocal FROM Indicators WHERE TimeInsertedLocal >= ( SELECT MAX(I.TimeInsertedLocal) FROM Indicators AS I ) and this is the entity : public class Indicator { public int A { get; set; } public int B { get; set; } public int C { get; set; } public int D { get; set; } public DateTime TimeInsertedLocal { get; set; } } How to write the LINQ

I think it's something wrong with the model in the example below, but I can't figure out what. In the example I have a Container class with Items containing sub Items. As soon as I try to create a container with more than one level of Items it looses the relationship with the container and therefore fails due to foreign key constraints. The exception I get is: Microsoft.EntityFrameworkCore.DbUpdateException : An error occurred while updating the entries. See the inner exception for details. ---- System.Data.SqlClient.SqlException : The INSERT statement conflicted with the FOREIGN KEY

Is it possible to use EF Core FromSql to execute a stored procedure that has optional parameters? I have been testing out a simple scenario to use as a template for updating old EF6 calls to EF Core calls. The test example I am using as a proof of concept: CREATE PROCEDURE [dbo].[TestNullableParameters] @addressId int = null, @city nvarchar(100) = null, @createdByUserId int AS BEGIN select * from CRM..Address a where (@addressId is null or a.AddressId = @addressId) and (@city is null or a.City like @city) and a.CreatedByUserId = @createdByUserId END My test code that calls this proc: [Test]