C#•7mo ago

❔ EFCore Interceptor problem

In the MS documentation I see they're using the SaveChanges interceptor as:

public async ValueTask<InterceptionResult<int>> SavingChangesAsync(
    DbContextEventData eventData,
    InterceptionResult<int> result,
    CancellationToken cancellationToken = default)
{
    _audit = CreateAudit(eventData.Context);

    using var auditContext = new AuditContext(_connectionString);

    auditContext.Add(_audit);
    await auditContext.SaveChangesAsync();

    return result;
}

public async ValueTask<InterceptionResult<int>> SavingChangesAsync(
    DbContextEventData eventData,
    InterceptionResult<int> result,
    CancellationToken cancellationToken = default)
{
    _audit = CreateAudit(eventData.Context);

    using var auditContext = new AuditContext(_connectionString);

    auditContext.Add(_audit);
    await auditContext.SaveChangesAsync();

    return result;
}

I'm trying to do the same but I get an error and I presume it's because of the value task:

  public override ValueTask<InterceptionResult<int>> SavingChangesAsync(DbContextEventData eventData, InterceptionResult<int> result,
        CancellationToken cancellationToken = new CancellationToken())
    {
        if (eventData.Context is null) return result;

        foreach (var entry in eventData.Context.ChangeTracker.Entries())
        {
            if (entry is not { State: EntityState.Deleted, Entity: ISoftDelete delete }) continue;
            entry.State = EntityState.Modified;
            delete.DeletedAt = DateTime.Now;
        }

        return result;
    }

  public override ValueTask<InterceptionResult<int>> SavingChangesAsync(DbContextEventData eventData, InterceptionResult<int> result,
        CancellationToken cancellationToken = new CancellationToken())
    {
        if (eventData.Context is null) return result;

        foreach (var entry in eventData.Context.ChangeTracker.Entries())
        {
            if (entry is not { State: EntityState.Deleted, Entity: ISoftDelete delete }) continue;
            entry.State = EntityState.Modified;
            delete.DeletedAt = DateTime.Now;
        }

        return result;
    }

The error is that it cannot convert result to ValueTask.... how does the MS example work though...

2 Replies

UltraWelfare•7mo ago

I'm dumb, I was missing the async keyword 🙂

Accord•7mo ago

Looks like nothing has happened here. I will mark this as stale and this post will be archived until there is new activity.

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❔ EFCore Interceptor problem