FieldType BuildQueryField <TSource, TReturn>(
string name,
Func <ResolveFieldContext <TSource>, IQueryable <TReturn> > resolve,
IEnumerable <QueryArgument> arguments,
Type graphType)
where TReturn : class
{
Guard.AgainstNullWhiteSpace(nameof(name), name);
Guard.AgainstNull(nameof(resolve), resolve);
graphType = GraphTypeFinder.FindGraphType <TReturn>(graphType);
var listGraphType = MakeListGraphType(graphType);
return(new FieldType
{
Name = name,
Type = listGraphType,
Arguments = ArgumentAppender.GetQueryArguments(arguments),
Resolver = new AsyncFieldResolver <TSource, IEnumerable <TReturn> >(
async context =>
{
var returnTypes = resolve(context);
var withIncludes = includeAppender.AddIncludes(returnTypes, context);
var withArguments = withIncludes.ApplyGraphQlArguments(context);
var list = await withArguments.ToListAsync(context.CancellationToken);
return await filters.ApplyFilter(list, context.UserContext);
})
});
}
public IQueryable <TItem> AddIncludes <TItem>(IQueryable <TItem> query, IResolveFieldContext context)
where TItem : class
{
return(includeAppender.AddIncludes(query, context));
}