Cannot update identity column 'Index'. EF Core

cannot update identity column in Entity Framework Core

I've added a separate Identification to the AspNetUsers table called NumericId that will serve along with the GUID like ID that ASP has for default....I've added the property as an additional property of the ApplicationUser class:...public class ApplicationUser : IdentityUser { [DatabaseGenerated(DatabaseGeneratedOption.Identity)] public vi...

Cannot insert explicit value for identity column while updating entity

StudentSemesterCore is not derived from Entity....You don't need to put Id property in StudentSemesterCore. Remove it....Add StudentDegreeCoreId to StudentSemesterCore as foreign key reference.

EF Core: Column with ValueGeneratedOnAdd trows "Cannot insert explicit value for identity column..."

I have ASP.NET MVC 5 application that uses Entity Framework 6.2. This app creates some records in MS SQL server....I have to process this records in AWS lambda function. For this purpose, I created c# .NET Core v2.0 lambda function. There I generate models from existed DB as described in the next article - ...Getting Started with EF Core on ASP.NET...

EF Core Code First - Clustered Index and Identity Column

I am using EF Core 2.0 to create a table in which the primary key is a ...GUID... and the clustered index is an auto-incrementing ...INT... column. But I'm getting this error:...Cannot create more than one clustered index on table 'Tenants'. Drop the existing clustered index 'PK_Tenants' before creating another...This is the code for creating enti...

EF Core "Cannot insert explicit value for identity column" although IDENTIY_INSERT is set to ON

EF Core opens / closes the connection for each database related operation, so setting the identity on with ...ExecuteSqlCommand... has no effect....You need to either explicitly keep the connection opened during the whole process:...identityContext.Database.OpenConnection(); try { // your code … } finally { identityContext.Database.Cl...

EF Core - Cannot insert explicit value for identity column SqlException

may be you are trying to assign a value explicitly to a column where the database automatically assigns it. or you created a non-identity PK field on a table. You can set that like this ...or you can also do that like this with identity fields:...[Key] [DatabaseGeneratedAttribute(DatabaseGeneratedOption.Identity)] public int ID { get; set; }

cascading foreign key 'X' cannot be created where the referencing column 'Y' is an identity column

I'm trying to upgrade the ...OwnedTypes sample... to EF Core 3.0 Preview 8 but when I run the project it can't create the database....When ...Microsoft.EntityFrameworkCore.Infrastructure.DatabaseFacade.EnsureCreated()... is called the following exception is thrown:...Microsoft.Data.SqlClient.SqlException: 'Cascading foreign key 'FK_OrderDetails_Det...

"Cannot insert explicit value for identity column in table" when inserting object with EF Core

The default convention is for the primary key of a class to be called either ...Id... or ...(classname)Id... - this is not the case in your class....Also: if you're mapping to an ...IDENTITY... column in SQL Server, you must add a relevant data annotation to the key column....Try this:...public partial class EmployeePermissions { // add the [Ke...

.NET Core 3.1 ChangePasswordAsync Inner Exception "Cannot update Identity column"

Create and Run migrations:...dotnet ef migrations add IdentityColumn dotnet ef database update

EF Core Update updates all columns even though only one has changed

I'm kind of new to using EF Core. It was my understanding that EF Core has a "Change Tracker" that looks at the data to see what columns have been modified and builds a SQL UPDATE statement that only updates the modified columns, as described in an answer here:...Does EF core compares value to include columns in update statement?...However, that is...