public override void OnConfigure(
IDescriptorContext context,
IObjectFieldDescriptor descriptor,
MemberInfo member)
{
descriptor.Resolve(async ctx =>
{
ICharacter character = ctx.Parent <ICharacter>();
ICharacterRepository repository = ctx.Service <ICharacterRepository>();
//This is injected by the PreProcessing middleware wen enabled...
var graphQLParams = new GraphQLParamsContext(ctx);
//********************************************************************************
//Perform some pre-processed retrieval of data from the Repository...
//Notice Pagination processing is pushed down to the Repository layer also!
//Get RepoDb specific mapper for the GraphQL parameter context...
//Note: It's important that we map to the DB Model (not the GraphQL model).
var repoDbParams = new GraphQLRepoDbMapper <CharacterDbModel>(graphQLParams);
//Now we can retrieve the related and paginated data from the Repo...
var pagedFriends = await repository.GetCharacterFriendsAsync(character.Id, repoDbParams.GetCursorPagingParameters());
return(new PreProcessedCursorSlice <ICharacter>(pagedFriends));
//********************************************************************************
});
}
public static IObjectFieldDescriptor Resolver(
this IObjectFieldDescriptor descriptor,
object constantResult)
{
if (descriptor is null)
{
throw new ArgumentNullException(nameof(descriptor));
}
return(descriptor.Resolve(
_ => new ValueTask <object?>(constantResult)));
}
public override void OnConfigure(
IDescriptorContext context,
IObjectFieldDescriptor descriptor,
MemberInfo member)
{
descriptor.Resolve(ctx =>
{
ICharacter character = ctx.Parent <ICharacter>();
ICharacterRepository repository = ctx.Service <ICharacterRepository>();
return(repository.GetCharacters(character.Friends.ToArray()));
});
}
public static IObjectFieldDescriptor Resolve <TResult>(
this IObjectFieldDescriptor descriptor,
TResult constantResult)
{
if (descriptor is null)
{
throw new ArgumentNullException(nameof(descriptor));
}
return(descriptor.Resolve(
ctx => new ValueTask <object?>(constantResult),
typeof(NativeType <TResult>)));
}
public static IObjectFieldDescriptor Resolver(
this IObjectFieldDescriptor descriptor,
Func <IResolverContext, object?> resolver)
{
if (descriptor is null)
{
throw new ArgumentNullException(nameof(descriptor));
}
if (resolver is null)
{
throw new ArgumentNullException(nameof(resolver));
}
return(descriptor.Resolve(ctx => new ValueTask <object?>(resolver(ctx))));
}
public static IObjectFieldDescriptor Resolver(
this IObjectFieldDescriptor descriptor,
Func <Task <object?> > resolver)
{
if (descriptor is null)
{
throw new ArgumentNullException(nameof(descriptor));
}
if (resolver is null)
{
throw new ArgumentNullException(nameof(resolver));
}
return(descriptor.Resolve(async _ => await resolver().ConfigureAwait(false)));
}
public override void OnConfigure(
IDescriptorContext context,
IObjectFieldDescriptor descriptor,
MemberInfo member)
{
descriptor.Resolve(
new List <Bar>
{
new Bar {
BarBaz = "a_a", BarQux = "a_c"
},
new Bar {
BarBaz = "a_b", BarQux = "a_d"
}
});
}
public static IObjectFieldDescriptor Resolve(
this IObjectFieldDescriptor descriptor,
Func <IResolverContext, CancellationToken, object?> resolver)
{
if (descriptor == null)
{
throw new ArgumentNullException(nameof(descriptor));
}
if (resolver == null)
{
throw new ArgumentNullException(nameof(resolver));
}
return(descriptor.Resolve(
ctx => new ValueTask <object?>(resolver(ctx, ctx.RequestAborted))));
}
public static IObjectFieldDescriptor Resolver <TResult>(
this IObjectFieldDescriptor descriptor,
Func <TResult> resolver)
{
if (descriptor is null)
{
throw new ArgumentNullException(nameof(descriptor));
}
if (resolver is null)
{
throw new ArgumentNullException(nameof(resolver));
}
return(descriptor.Resolve(_ =>
new ValueTask <object?>(resolver()),
typeof(NativeType <TResult>)));
}