Querying against DbContext.Set(TypeVariable) in Entity Framework

Question

I\'m re-factoring an application to invert some dependencies. Part of the original code uses DbContext.Set() to obtain the set to query agai

Answer 1

I haven't compiled it so please excuse any formatting issues - can you use the dynamic type to achieve the same thing?

private IActionTarget DbContextGetEntity(Type targetType, IActionTarget key)
{
    dynamic instance = Activator.CreateInstance(targetType);
    return DbContextGetEntity(instance, key);
}

private IActionTarget DbContextGetEntity<T>(T instance, IActionTarget key)
    where T : class, IActionTarget
{
    var set = Context.Set<T>(targetType);
    if (set == null)
    {
        throw new Exception();
    }

    // Look in the local cache first
    var entity = set.Local
        .FirstOrDefault(l => l.Id == key.Id && l.EffectiveDate == key.EffectiveDate);

    if (entity == null)
    {
        // If not found locally, hit the database
        entity = set
            .FirstOrDefault(e => e.Id == key.Id && e.EffectiveDate == key.EffectiveDate);
    }
    return entity;
}