/// <summary>
/// Executes INSERT operation.
/// </summary>
/// <typeparam name="T">Type of the entity.</typeparam>
/// <param name="queryEndpoint">The query endpoint.</param>
/// <param name="evaluator">The expression, tha specify new values.</param>
/// <returns>Key of the created entity.</returns>
public static Key Insert <T>(this QueryEndpoint queryEndpoint, Expression <Func <T> > evaluator) where T : Entity
{
var operation = new InsertOperation <T>(queryEndpoint.Provider, evaluator);
operation.Execute();
return(operation.Key);
}
/// <summary>
/// Asynchronously executes INSERT operation.
/// </summary>
/// <remarks>Multiple active operations in the same session instance are not supported. Use
/// <see langword="await"/> to ensure that all asynchronous operations have completed before calling
/// another method in this session.</remarks>
/// <typeparam name="T">Type of the entity.</typeparam>
/// <param name="queryEndpoint">The query endpoint.</param>
/// <param name="evaluator">The expression, tha specify new values.</param>
/// <param name="token">The cancellation token to terminate execution if necessary.</param>
/// <returns>Key of the created entity.</returns>
public static async Task <Key> InsertAsync <T>(this QueryEndpoint queryEndpoint, Expression <Func <T> > evaluator,
CancellationToken token = default) where T : Entity
{
var operation = new InsertOperation <T>(queryEndpoint.Provider, evaluator);
await operation.ExecuteAsync(token).ConfigureAwait(false);
return(operation.Key);
}