For my needs, I tried to force TPC (Table Per Concrete class) for my entities by calling the MapInheritedProperties() by using Reflection.
So what i want is to make calls like this one for all my entities in the OnModelCreating method of DbContext
modelBuilder.Entity<MyEntity>().Map(o => o.MapInheritedProperties())
What I tried to do is this but I don't succeed to create a delegate of the method MapInheritedProperties() cause I get the following exception : Cannot bind to the target method because its signature or security transparency is not compatible with that of the delegate type.
foreach (var feEntityType in this.GetEntityTypes(onlyConcreteClasses: true))
{
// modelBuilder.Entity<Person>()
var entityMethodInvoked = modelBuilder.GetType().GetMethod("Entity").MakeGenericMethod(feEntityType).Invoke(modelBuilder, null);
// o.MapInheritedProperties()
ParameterExpression parameterExpression = ParameterExpression.Parameter(typeof(EntityMappingConfiguration<>).MakeGenericType(feEntityType), "o");
MethodInfo methodInfo = typeof(EntityMappingConfiguration<>).MakeGenericType(feEntityType).GetMethod("MapInheritedProperties", new Type[] { });
Expression mapInheritedPropertiesMethodExpression = Expression.Call(parameterExpression, methodInfo);
// Method Map<T>(...)
var mapMethod = typeof(EntityTypeConfiguration<>)
.MakeGenericType(feEntityType)
.GetMethods()
.Single(o => o.Name == "Map" && o.IsGenericMethod);
// Func<EntityMappingConfiguration<MonEntite>>
var mapMethodParameterType = typeof(Func<>).MakeGenericType(typeof(EntityMappingConfiguration<>).MakeGenericType(feEntityType));
var mapAction = methodInfo.CreateDelegate(mapMethodParameterType); // <== DOESN'T WORK ==> Cannot bind to the target method because its signature or security transparency is not compatible with that of the delegate type.
var mapMethodInvoked = mapMethod.MakeGenericMethod(feEntityType).Invoke(entityMethodInvoked, new[] { /* PARAMETER */ });
}
Here is how I get my concrete entities
protected IEnumerable<Type> GetEntityTypes(bool onlyConcreteClasses = false)
{
var entityTypes = typeof(EntitiesLocation).Assembly.GetTypes().Where(o => o.GetInterfaces().Contains(typeof(IEntity)));
foreach (var item in entitiesTypes)
{
if (onlyConcreteClasses && item.IsAbstract)
continue;
yield return item;
}
}
Any idea about how I could create the delegate ? Or another way to call the method MapInheritedProperties() for all my entities without having to make it manually ?