protected static void AttachCyclicNavigationProperty(IObjectContextAdapter context, object parent, object child, PropertyInfo navProperty = null)
{
if (parent == null || child == null)
{
return;
}
var parentType = ObjectContext.GetObjectType(parent.GetType());
var childType = ObjectContext.GetObjectType(child.GetType());
var navigationProperties = context.GetNavigationPropertiesForType(childType);
PropertyInfo parentNavigationProperty = null;
if (navProperty != null)
{
parentNavigationProperty = navProperty;
}
else
{
parentNavigationProperty = navigationProperties
.Where(navigation => navigation.TypeUsage.EdmType.Name == parentType.Name)
.Select(navigation => childType.GetProperty(navigation.Name, BindingFlags.Instance | BindingFlags.NonPublic | BindingFlags.Public))
.FirstOrDefault();
}
if (parentNavigationProperty != null)
{
parentNavigationProperty.SetValue(child, parent, null);
}
}
internal static IEnumerable <NavigationProperty> GetRequiredNavigationPropertiesForType(this IObjectContextAdapter context, Type entityType)
{
return(context.GetNavigationPropertiesForType(ObjectContext.GetObjectType(entityType))
.Where(navigationProperty => navigationProperty.ToEndMember.RelationshipMultiplicity == RelationshipMultiplicity.One));
}