/// <summary>
/// Add or update the document
/// Calls the base class because there may be some generic behavior in it
/// </summary>
/// <typeparam name="T">generic type</typeparam>
/// <param name="listModels">list generic models</param>
/// <returns>The upserted Entity</returns>
public override async Task <IEnumerable <T> > AddOrUpdateAsync <T>(List <T> listModels)
{
await base.AddOrUpdateAsync(listModels);
var itemBatch = DynamoDbContext.CreateBatchWrite <T>();
listModels.ToList().ForEach(x => itemBatch.AddPutItem(x));
await itemBatch.ExecuteAsync();
return(listModels);
}