/// <summary>
/// Delete an existing instance from database.
/// </summary>
/// <param name="instance">Instance unique identifier.</param>
private static int DeleteDatabaseForeignRecords(long id)
{
int rowsAffected = 0;
object dummy;
T instance = default;
Type foreignType;
MethodInfo deleteMethod;
// Check if there are any foreign collection to delete in cascade
foreach (ORMEntityMember member in ORMEntity <T> .ORMStructure.ForeignCollections)
{
// Get the owner instance
if (instance == null)
{
instance = ORMEntity <T> .Get(id);
}
if (((ORMForeignCollection)member.Attribute).OnDeleteAction == OnDeleteActionTypes.DeleteInCascade)
{
// Get the method GET(long)
foreignType = member.ForeignCollectionType;
foreignType = typeof(ORMEntity <>).MakeGenericType(foreignType);
deleteMethod = foreignType.GetMethod("Delete", new Type[] { typeof(Int64) });
// Delete each instance in collection
foreach (long objId in ORMEntity <T> .GetForeignCollectionIdentifiers(instance, member))
{
// Invoke the method
dummy = Activator.CreateInstance(foreignType);
rowsAffected += (int)deleteMethod.Invoke(dummy, new object[] { objId });
}
}
}
return(rowsAffected);
}
