/// <summary>
/// This is an internal API that supports the Entity Framework Core infrastructure and not subject to
/// the same compatibility standards as public APIs. It may be changed or removed without notice in
/// any release. You should only use it directly in your code with extreme caution and knowing that
/// doing so can result in application failures when updating to a new Entity Framework Core release.
/// </summary>
public virtual void AppendOrdering(OrderingExpression orderingExpression)
{
if (_orderings.FirstOrDefault(o => o.Expression.Equals(orderingExpression.Expression)) == null)
{
_orderings.Add(orderingExpression);
}
}
/// <summary>
/// This is an internal API that supports the Entity Framework Core infrastructure and not subject to
/// the same compatibility standards as public APIs. It may be changed or removed without notice in
/// any release. You should only use it directly in your code with extreme caution and knowing that
/// doing so can result in application failures when updating to a new Entity Framework Core release.
/// </summary>
protected override Expression VisitOrdering(OrderingExpression orderingExpression)
{
Visit(orderingExpression.Expression);
if (!orderingExpression.IsAscending)
{
_sqlBuilder.Append(" DESC");
}
return(orderingExpression);
}
/// <summary>
/// This is an internal API that supports the Entity Framework Core infrastructure and not subject to
/// the same compatibility standards as public APIs. It may be changed or removed without notice in
/// any release. You should only use it directly in your code with extreme caution and knowing that
/// doing so can result in application failures when updating to a new Entity Framework Core release.
/// </summary>
public virtual void ApplyOrdering(OrderingExpression orderingExpression)
{
if (IsDistinct ||
Limit != null ||
Offset != null)
{
throw new InvalidOperationException("See issue#16156");
}
_orderings.Clear();
_orderings.Add(orderingExpression);
}
/// <summary>
/// This is an internal API that supports the Entity Framework Core infrastructure and not subject to
/// the same compatibility standards as public APIs. It may be changed or removed without notice in
/// any release. You should only use it directly in your code with extreme caution and knowing that
/// doing so can result in application failures when updating to a new Entity Framework Core release.
/// </summary>
protected override Expression VisitOrdering(OrderingExpression orderingExpression)
{
Check.NotNull(orderingExpression, nameof(orderingExpression));
Visit(orderingExpression.Expression);
if (!orderingExpression.IsAscending)
{
_sqlBuilder.Append(" DESC");
}
return(orderingExpression);
}
/// <summary> /// This is an internal API that supports the Entity Framework Core infrastructure and not subject to /// the same compatibility standards as public APIs. It may be changed or removed without notice in /// any release. You should only use it directly in your code with extreme caution and knowing that /// doing so can result in application failures when updating to a new Entity Framework Core release. /// </summary> protected abstract Expression VisitOrdering(OrderingExpression orderingExpression);
protected abstract Expression VisitOrdering([NotNull] OrderingExpression orderingExpression);
