// Batching when field is a list
public IList <OtherThing> GetOtherThings(IFieldContext context, Thing parent)
{
var allParents = context.GetAllParentEntities <Thing>();
var batchedResults = allParents.ToDictionary(p => p, p => p.OtherThings);
context.SetBatchedResults(batchedResults, new List <OtherThing>());
return(null); // the engine will lookup result for this field in batched results
}
// Batching when field is a list
public IList <OtherThing> GetOtherThings(IFieldContext context, Thing parent)
{
var allParents = context.GetAllParentEntities <Thing>();
var batchedResults = allParents.ToDictionary(p => p, p => p.OtherThings);
context.SetBatchedResults(batchedResults);
return(batchedResults[parent]);
}
// Demo of BATCHing functionality (aka DataLoader) - loading field values for ALL parent objects in request
public OtherThing GetMainOtherThing(IFieldContext context, Thing parent)
{
var allParents = context.GetAllParentEntities <Thing>();
var batchedResults = allParents.ToDictionary(p => p, p => p.MainOtherThing);
context.SetBatchedResults(batchedResults);
return(parent.MainOtherThing);
}
// Demo of BATCHing functionality (aka DataLoader) - loading field values for ALL parent objects in request
public OtherThing GetMainOtherThing(IFieldContext context, Thing parent)
{
var allParents = context.GetAllParentEntities <Thing>();
var batchedResults = allParents.ToDictionary(p => p, p => p.MainOtherThing);
context.SetBatchedResults(batchedResults, null);
// return parent.MainOtherThing;
return(null); // the engine will lookup result for this field in batched results
}
// batched version of GetStarships
public IList <Starship> GetStarshipsBatched(IFieldContext fieldContext, Human human)
{
// batch execution; we retrieve all pending parents (humans),
// get all their starships to a dictionary, and then post it back into context -
// the engine will use this dictionary to lookup values and will not call resolver anymore
var allParents = fieldContext.GetAllParentEntities <Human>();
var shipsByHuman = allParents.ToDictionary(h => h, h => h.Starships);
fieldContext.SetBatchedResults <Human, IList <Starship> >(shipsByHuman, valueForMissingKeys: new List <Starship>());
return(null); // the engine will use batch results dict to lookup the value
}
