Does anyone know of a way or have an implementation to apply ALL classes that derive from IEntityTypeConfiguration<>
to the DbContext
at runtime?
There doesn't seem to be anything built in and loading each one manually via:
protected override void OnModelCreating(ModelBuilder modelBuilder)
{
modelBuilder.ApplyConfiguration(new Table1Config())
modelBuilder.ApplyConfiguration(new Table2Config())
...
modelBuilder.ApplyConfiguration(new TableNConfig())
}
is going to prove rather tedious for a database with many tables.
You can write an extension method as follows:
public static class ModelBuilderExtensions
{
public static void ApplyAllConfigurations(this ModelBuilder modelBuilder)
{
var typesToRegister = Assembly.GetExecutingAssembly().GetTypes().Where(t => t.GetInterfaces()
.Any(gi => gi.IsGenericType && gi.GetGenericTypeDefinition() == typeof(IEntityTypeConfiguration<>))).ToList();
foreach (var type in typesToRegister)
{
dynamic configurationInstance = Activator.CreateInstance(type);
modelBuilder.ApplyConfiguration(configurationInstance);
}
}
}
Then in the OnModelCreating
as follows:
protected override void OnModelCreating(ModelBuilder modelBuilder)
{
base.OnModelCreating(modelBuilder);
modelBuilder.ApplyAllConfigurations();
}
From EF Core 2.2
you don't need to write any custom extension method. EF Core 2.2
added ApplyConfigurationsFromAssembly
extension method for this purpose. You can just use it as follows:
protected override void OnModelCreating(ModelBuilder modelBuilder)
{
base.OnModelCreating(modelBuilder);
modelBuilder.ApplyConfigurationsFromAssembly(typeof(UserConfiguration).Assembly); // Here UseConfiguration is any IEntityTypeConfiguration
}
Thank you.