private async Task <IEnumerable <Row> > ResolveRelated(ReadonlyResolveFieldContext ctx, string loaderName,
Func <IEnumerable <Key>, IEnumerable <Row> > getData)
{
// DATA LOADER
var dataloader = (IDataLoaderContextAccessor)_serviceProvider.GetService(typeof(IDataLoaderContextAccessor));
var listLoader = dataloader.Context
.GetOrAddCollectionBatchLoader <Key, Row>(
loaderKey: loaderName,
fetchFunc: async(parentKeysList) =>
{
var resultRows = getData(parentKeysList);
var lookup = resultRows.ToLookup <Row, Key>(
row =>
{
return(row.Key);
}, new KeyComparer());
return(lookup);
},
new KeyComparer() //
);
if (ctx.Source is Row row)
{
var ret = await listLoader.LoadAsync(row.Key);
return(ret);
}
var noNestedData = getData(null);
return(noNestedData);
}
public Task <IReadOnlyList <Review> > GetMovieReviews(ReadonlyResolveFieldContext ctx)
{
var movie = ctx.Source.GetPropertyValue <Movie>();
return(_mediator.Send(new GetReviewsByMovieId.Request(movie.Id)));
}
