/// <summary>
/// Gets a single result.
/// </summary>
/// <typeparam name="TDocument">The type of the document.</typeparam>
/// <typeparam name="TProjection">The type of the projection (same as TDocument if there is no projection).</typeparam>
/// <param name="find">The fluent find.</param>
/// <param name="cancellationToken">The cancellation token.</param>
/// <returns>A Task whose result is the single result.</returns>
public static TProjection Single <TDocument, TProjection>(this IFindFluent <TDocument, TProjection> find, CancellationToken cancellationToken = default(CancellationToken))
{
Ensure.IsNotNull(find, nameof(find));
if (!find.Options.Limit.HasValue || find.Options.Limit.Value > 2)
{
find = find.Limit(2);
}
return(IAsyncCursorSourceExtensions.Single(find, cancellationToken));
}
/// <summary>
/// Returns the only document of the aggregate result. Throws an exception if the result set does not contain exactly one document.
/// </summary>
/// <typeparam name="TResult">The type of the result.</typeparam>
/// <param name="aggregate">The aggregate.</param>
/// <param name="cancellationToken">The cancellation token.</param>
/// <returns>
/// The fluent aggregate interface.
/// </returns>
public static TResult Single <TResult>(this IAggregateFluent <TResult> aggregate, CancellationToken cancellationToken = default(CancellationToken))
{
Ensure.IsNotNull(aggregate, nameof(aggregate));
return(IAsyncCursorSourceExtensions.Single(aggregate.Limit(2), cancellationToken));
}
