public async Task <IEnumerable <Owner> > GetOwnersByAddress(string address, IResolverContext context)
{
IDataLoader <string, Owner[]> ownerDataLoader =
context.GroupDataLoader <string, Owner>(
"ownersByAddress",
_ownerRepository.GetOwnersByAddress);
return(await ownerDataLoader.LoadAsync(context.Argument <string>("address")));
}
public async Task <Comment[]> Comments([Parent] Post post, IResolverContext context)
{
var dataLoader = context.GroupDataLoader <int, Comment>("postComments", async keys =>
{
var db = CreateDataContext();
var comments = await db.Comments.Where(c => keys.Contains(c.PostId)).ToListAsync();
return(comments.ToLookup(c => c.PostId));
});
return(await dataLoader.LoadAsync(post.Id, CancellationToken.None));
}
public async Task <Tag[]> Tags([Parent] Post post, IResolverContext context)
{
var dataLoader = context.GroupDataLoader <int, Tag>("postTags", async keys =>
{
var db = CreateDataContext();
var q = from pt in db.PostTags
join t in db.Tags on pt.TagId equals t.Id
where keys.Contains(pt.PostId)
select new { pt.PostId, Tag = t };
var children = await q.ToListAsync();
return(children.ToLookup(c => c.PostId, c => c.Tag));
});
return(await dataLoader.LoadAsync(post.Id, CancellationToken.None));
}
public async Task <Post[]> Posts([Parent] Tag tag, IResolverContext context)
{
var dataLoader = context.GroupDataLoader <int, Post>("tagPosts", async keys =>
{
var db = CreateDataContext();
var q = from pt in db.PostTags
join p in db.Posts on pt.PostId equals p.Id
where keys.Contains(pt.TagId)
select new { pt.TagId, Post = p };
var children = await q.ToListAsync();
return(children.ToLookup(c => c.TagId, c => c.Post));
});
return(await dataLoader.LoadAsync(tag.Id, CancellationToken.None));
}
