public static Task <NameAndCount[]> GetTermsCount(this IAsyncDatabaseCommands cmds, string indexName, string field, string fromValue, int pageSize)
{
string[] terms = null;
return(cmds.GetTermsAsync(indexName, field, fromValue, pageSize)
.ContinueWith(task =>
{
terms = task.Result;
var termRequests = terms.Select(term => new IndexQuery
{
Query = field + ":" + RavenQuery.Escape(term),
PageSize = 0,
}.GetIndexQueryUrl("", indexName, "indexes"))
.Select(url =>
{
var uriParts = url.Split(new[] { '?' }, StringSplitOptions.RemoveEmptyEntries);
return new GetRequest
{
Url = uriParts[0],
Query = uriParts[1]
};
})
.ToArray();
if (termRequests.Length == 0)
{
return Task.Factory.StartNew(() => new NameAndCount[0]);
}
return cmds.MultiGetAsync(termRequests)
.ContinueWith(termsResultsTask => termsResultsTask.Result.Select((t, i) => new NameAndCount
{
Count = t.Result.Value <int>("TotalResults"),
Name = terms[i]
}).ToArray());
})
.Unwrap());
}