public virtual object ApplyQueryOptions(object value, HttpRequest request, ActionDescriptor actionDescriptor, AssembliesResolver assembliesResolver)
{
var elementClrType = value is IEnumerable
? TypeHelper.GetImplementedIEnumerableType(value.GetType())
: value.GetType();
var model = request.ODataProperties().Model;
if (model == null)
{
throw Error.InvalidOperation(SRResources.QueryGetModelMustNotReturnNull);
}
var queryContext = new ODataQueryContext(
model,
elementClrType,
assembliesResolver,
request.ODataProperties().Path
);
var queryOptions = new ODataQueryOptions(queryContext, request, assembliesResolver);
var enumerable = value as IEnumerable;
if (enumerable == null)
{
// response is single entity.
return(value);
}
// response is a collection.
var query = (value as IQueryable) ?? enumerable.AsQueryable();
query = queryOptions.ApplyTo(query,
new ODataQuerySettings
{
// TODO: If we are using SQL, set this to false
// otherwise if it is entities in code then
// set it to true
HandleNullPropagation =
//HandleNullPropagationOption.True
HandleNullPropagationOptionHelper.GetDefaultHandleNullPropagationOption(query),
PageSize = actionDescriptor.PageSize(),
SearchDerivedTypeWhenAutoExpand = true
},
AllowedQueryOptions.None);
// Determine if this result should be a single entity
if (ODataCountMediaTypeMapping.IsCountRequest(request))
{
long?count = request.ODataProperties().TotalCount;
if (count.HasValue)
{
// Return the count value if it is a $count request.
return(count.Value);
}
}
return(query);
}
/// <summary>
/// Applies the query to the given entity based on incoming query from uri and query settings.
/// </summary>
/// <param name="query">The original entity from the response message.</param>
/// <param name="queryOptions">
/// The <see cref="ODataQueryOptions"/> instance constructed based on the incoming request.
/// </param>
/// <param name="shouldApplyQuery"></param>
/// <param name="actionDescriptor"></param>
/// <returns>The new entity after the $select and $expand query has been applied to.</returns>
protected virtual async Task <IQueryable> ApplyQueryAsync(IQueryable query,
ODataQueryOptions queryOptions,
bool shouldApplyQuery)
{
if (query == null)
{
throw Error.ArgumentNull("entity");
}
if (queryOptions == null)
{
throw Error.ArgumentNull("queryOptions");
}
query = (IQueryable)
await InvokeInterceptorsAsync(query, queryOptions.Context.ElementClrType, queryOptions, QuerySettings);
if (shouldApplyQuery)
{
// TODO: If we are using SQL, set this to false
// otherwise if it is entities in code then
// set it to true
QuerySettings.HandleNullPropagation =
//HandleNullPropagationOption.True
HandleNullPropagationOptionHelper.GetDefaultHandleNullPropagationOption(query);
//PageSize = actionDescriptor.PageSize(),
//var pageSize = ResolvePageSize(settings, actionDescriptor);
query = queryOptions.ApplyTo(query, new ODataQuerySettings
{
HandleNullPropagation = HandleNullPropagationOption.False
},
PageSize, queryOptions);
}
return(query);
}
public static ODataQuerySettings UpdateQuerySettings(this ODataQueryContext context, ODataQuerySettings querySettings, IQueryable query)
{
ODataQuerySettings updatedSettings = context.RequestContainer.GetRequiredService <ODataQuerySettings>();
updatedSettings.CopyFrom(querySettings);
if (updatedSettings.HandleNullPropagation == HandleNullPropagationOption.Default)
{
updatedSettings.HandleNullPropagation = query != null
? HandleNullPropagationOptionHelper.GetDefaultHandleNullPropagationOption(query)
: HandleNullPropagationOption.True;
}
return(updatedSettings);
}
