func lookupShelfDatastore(ctx ae.Context, user string) (shelf *data.Bookshelf, err error) {
ancestor := ds.NewKey(ctx, data.KindBookshelf, user, 0, nil)
query := ds.NewQuery(data.KindBookInfo).Ancestor(ancestor)
targetMeta := new(data.BookMetaData)
targetShelf := new(data.Bookshelf)
switch err = ds.Get(ctx, ancestor, shelf); err {
case nil:
// all good
case ds.ErrNoSuchEntity:
targetShelf.Version = Latest
default:
return
}
it := query.Run(ctx)
for _, err = it.Next(targetMeta); err == nil; _, err = it.Next(targetMeta) {
targetShelf.Books = append(targetShelf.Books, *targetMeta)
targetMeta = new(data.BookMetaData)
}
if err == ds.Done {
err = nil
shelf = targetShelf
}
ctx.Infof("Found %d items in datastore for key %v (error: %v)", len(targetShelf.Books), ancestor, err)
return
}
func getVolumeBulk(call *Call) (reply *data.LookupReply, err error) {
var shelf *data.Bookshelf
if shelf, err = persistence.LookupBookshelf(call.Context); err == nil {
call.Context.Debugf("Bookshelf contains %d volumes", len(shelf.Books))
infos := shelf.Books
for _, str := range call.Request.URL.Query()["search"] {
matches := shelf.Search(str)
infos = make([]data.BookMetaData, len(matches))
for i, ptr := range matches {
infos[i] = *ptr
}
call.Context.Debugf("Filtered by \"%s\", down to %d entries: %v", str, len(infos), infos)
}
reply = &data.LookupReply{
Count: len(infos),
BookInfos: shelf.Books,
}
}
return
}