// callNext issues a datastore_v3/Next RPC to advance a cursor, such as that
// returned by a query with more results.
func callNext(c appengine.Context, res *pb.QueryResult, offset, limit int32, zlp zeroLimitPolicy) error {
if res.Cursor == nil {
return errors.New("datastore: internal error: server did not return a cursor")
}
// TODO: should I eventually call datastore_v3/DeleteCursor on the cursor?
req := &pb.NextRequest{
Cursor: res.Cursor,
Offset: proto.Int32(offset),
}
if limit != 0 || zlp == zeroLimitMeansZero {
req.Count = proto.Int32(limit)
}
if res.CompiledCursor != nil {
req.Compile = proto.Bool(true)
}
res.Reset()
return c.Call("datastore_v3", "Next", req, res, nil)
}
// callNext issues a datastore_v3/Next RPC to advance a cursor, such as that
// returned by a query with more results.
func callNext(c appengine.Context, res *pb.QueryResult, offset, limit int32) error {
if res.Cursor == nil {
return errors.New("datastore: internal error: server did not return a cursor")
}
req := &pb.NextRequest{
Cursor: res.Cursor,
}
if limit >= 0 {
req.Count = proto.Int32(limit)
}
if offset != 0 {
req.Offset = proto.Int32(offset)
}
if res.CompiledCursor != nil {
req.Compile = proto.Bool(true)
}
res.Reset()
return c.Call("datastore_v3", "Next", req, res, nil)
}