A default DbContext context must exist, or a context factory must be provided (EntityFrameworkManager.ContextFactory). This setting is required for some additional features

[joelnotified]

Hi!
I'm trying to use BulkSaveChangesAsync together with EF Core (and Postgresql if that makes any difference) in an ASP.NET Core project.

I get the following error:
A default DbContext context must exist, or a context factory must be provided (EntityFrameworkManager.ContextFactory). This setting is required for some additional features

This is the package I use:
<PackageReference Include="Z.EntityFramework.Extensions.EFCore" Version="0.0.1-beta5" />

I have configured EF like this:

services
                .AddEntityFrameworkNpgsql()
                .AddDbContext<AppDataContext>(options =>
                {
                    options.UseNpgsql(connectionString);
                })
                .AddDbContext<DataContext>(options =>
                {
                    options.UseNpgsql(connectionString);
                });

I do not really understand the error message, how should I configure a default DbContext (as you can see I have multiple contexts). Or where should I provide the context factory?

Thank you!

[JonathanMagnan]

Hello Joel,

Currently, we do not support PostgreSQL for the EF Core version. We will try to add the support during the weekend since almost everything is already here.

About the error, it's caused because there is no default constructor for your context. For EF Core, we modified a little bit our code and it must require now to be able to create a context.

Example:

static ApplicationDbContextPCore()
{
	var options = new DbContextOptionsBuilder();
	options.UseNpgsql(new SqlConnection(My.Config.ConnectionStrings.TestDatabase));
	EntityFrameworkManager.ContextFactory = context => new ApplicationDbContextPCore(options);
}

We will try to document and improve the error message as well.

More information will be provided as soon as we support it.

Best Regards,

Jonathan

[joelnotified]

Alright! Thank you for the answer, looking forward for an updated version then :)

[JonathanMagnan]

Hello @joelnotified ,

We finally success to release our stable version which supports PostgreSQL ;)

https://www.nuget.org/packages/Z.EntityFramework.Extensions.EFCore/

Let me know if you found some issue.

Best Regards,

Jonathan

[JonathanMagnan]

Closing Comment: Fix released

[lexaguilar]

var auxs = new List<ConciliacionBancariaAux>();

        foreach (var aux in conciliacionViewModel.conciliacionBancariaAux)
        {
            var conciliado= !string.IsNullOrEmpty(aux.Uuid);

            //if(aux.IsNew)
            {
                auxs.Add(new ConciliacionBancariaAux    
                {
                    ProcesoBancoId = procesoBancoId,
                    Fecha = aux.Fecha,
                    Referencia = aux.Referencia,
                    TipoMovimientoId = aux.TipoMovimientoId,
                    Debito = aux.Debito,
                    Credito = aux.Credito,
                    EstadoId = aux.EstadoId,
                    Uuid = aux.Uuid,
                    Conciliado = conciliado,
                    TableInfo = aux.TableInfo,
                    IdOrigen = aux.IdOrigen,
                    IdRef = aux.IdRef, 
                    Arrastrado = !aux.IsNew,
                    IsNew = aux.IsNew,
                    ProcesoBancoIdOld = aux.ProcesoBancoIdOld
                });
            } 
        }

        db.BulkInsert(auxs);

Error : A default DbContext context must exist, or a context factory must be provided 

`<PackageReference Include="Z.EntityFramework.Extensions.EFCore" Version="2.1.47" />`