This example works fine for me

defmodule Blog.Post do
  use Memento.Table,
    attributes: [:id, :title, :content, :status, :author_id],
    index: [:status, :author_id],
    type: :ordered_set,
    autoincrement: true
end
Memento.Table.create(Blog.Post)

Nice okay. Now I got the table created, :mnesia.schema also sees it. Writing to the table works fine, but trying to read from it always gives me this error:

** (exit) {:aborted, :no_transaction}
    (mnesia 4.23) mnesia.erl:362: :mnesia.abort/1
    iex:6: (file)

measured with the benchee:

Name                          ips        average  deviation         median         99th %
batch_histogram_nif       39.65 K      0.0252 ms    ±79.52%      0.0239 ms      0.0441 ms
batch_histogram_elx       0.154 K        6.49 ms     ±8.04%        6.39 ms        7.62 ms

Comparison: 
batch_histogram_nif       39.65 K
batch_histogram_elx       0.154 K - 257.16x slower +6.46 ms

measured with the benchee:

Name                          ips        average  deviation         median         99th %
batch_histogram_nif         0.124         8.04 s     ±0.00%         8.04 s         8.04 s
batch_histogram_elx        0.0698        14.33 s     ±0.00%        14.33 s        14.33 s

Comparison: 
batch_histogram_nif         0.124
batch_histogram_elx        0.0698 - 1.78x slower +6.28 s