/// <summary>
///
/// </summary>
/// <param name="queryable"></param>
/// <param name="path"></param>
/// <param name="applyCount"></param>
/// <returns></returns>
private async Task <(IQueryable Queryable, ETag Etag)> ApplyQueryOptionsAsync(IQueryable queryable, ODataPath path, bool applyCount)
{
ETag etag = null;
if (shouldWriteRawValue)
{
// Query options don't apply to $value.
return(queryable, null);
}
var properties = Request.ODataProperties();
var model = await api.GetModelAsync().ConfigureAwait(false);
var queryContext = new ODataQueryContext(model, queryable.ElementType, path);
var queryOptions = new ODataQueryOptions(queryContext, Request);
// Get etag for query request
if (queryOptions.IfMatch != null)
{
etag = queryOptions.IfMatch;
}
else if (queryOptions.IfNoneMatch != null)
{
etag = queryOptions.IfNoneMatch;
}
// TODO GitHubIssue#41 : Ensure stable ordering for query
if (shouldReturnCount)
{
// Query options other than $filter and $search don't apply to $count.
queryable = queryOptions.ApplyTo(queryable, querySettings, AllowedQueryOptions.All ^ AllowedQueryOptions.Filter);
return(queryable, etag);
}
if (queryOptions.Count != null && !applyCount)
{
var queryExecutorOptions = api.GetApiService <RestierQueryExecutorOptions>();
queryExecutorOptions.IncludeTotalCount = queryOptions.Count.Value;
queryExecutorOptions.SetTotalCount = value => properties.TotalCount = value;
}
// Validate query before apply, and query setting like MaxExpansionDepth can be customized here
queryOptions.Validate(validationSettings);
// Entity count can NOT be evaluated at this point of time because the source
// expression is just a placeholder to be replaced by the expression sourcer.
if (!applyCount)
{
queryable = queryOptions.ApplyTo(queryable, querySettings, AllowedQueryOptions.Count);
}
else
{
queryable = queryOptions.ApplyTo(queryable, querySettings);
}
return(queryable, etag);
}