Error On Guest Customer Insert

InvalidOperationException: The property 'Id' on entity type 'Customer' has a temporary value while attempting to change the entity's state to 'Unchanged'. Either set a permanent value explicitly or ensure that the database is configured to generate values for this property.
Nop.Web.Framework.Infrastructure.Extensions.ApplicationBuilderExtensions+<>c.<UseNopExceptionHandler>b__1_1(HttpContext context) in ApplicationBuilderExtensions.cs
Microsoft.AspNetCore.Diagnostics.ExceptionHandlerMiddleware.Invoke(HttpContext context)
Microsoft.AspNetCore.Diagnostics.ExceptionHandlerMiddleware.Invoke(HttpContext context)
Microsoft.AspNetCore.Diagnostics.DeveloperExceptionPageMiddleware.Invoke(HttpContext context)


Please Help

Any update on this or on same post ?

probably you are leaving not nullable item as null or empty

I’m getting same error during insert Product from plugin.

If I insert new product from admin area, it’s working fine.

rajupaladiya wrote:


I was having the same issue as well, for test fill every item and try like that. I was using kendo autocomplete and when i left that area empty had same error. after filling it no error.

Hi It’s worked.

I prepare again model and pass in service with required values and it’s work.

Thank You

rajupaladiya wrote:

yw. EF Core 2 is kinda interesting :)

I was running into this issue when starting a new threaded task.

                
var process = new Thread(delegate ()
                {
                    using (var scope = _serviceScopeFactory.CreateScope())
                    {
                        var prepareDatabaseService = scope.ServiceProvider.GetService<IPrepareDatabaseService>();
                        prepareDatabaseService.PrepareDatabase(out resultSuccess);
                    }
                });
                process.Start();

The service was configured as SingleInstance. When I changed it to InstancePerLifetimeScope, it worked without throwing any exceptions.

It may not apply to everyone but can be something to check if you are using your own service.