Mix.install(
  [:ecto, :ecto_sql, :ecto3_mnesia, :kino, :kino_db]
)

defmodule MyApp.Repo do
  use Ecto.Repo, otp_app: :my_app, adapter: Ecto.Adapters.Mnesia
end
Kino.start_child({MyApp.Repo, []})

{:error,
 {%ArgumentError{message: "unknown application: :my_app"},
  [
    {Application, :app_dir, 1, [file: ~c"lib/application.ex", line: 1010]},
    {Application, :app_dir, 2, [file: ~c"lib/application.ex", line: 1037]},
    {Ecto.Adapters.Mnesia.Config, :set_path, 1,
     [file: ~c"lib/ecto/adapters/mnesia/config.ex", line: 39]},
    {Ecto.Adapters.Mnesia.Config, :new, 1, [file: ~c"lib/ecto/adapters/mnesia/config.ex", line: 10]},
    {Ecto.Adapters.Mnesia, :init, 1, [file: ~c"lib/ecto/adapters/mnesia.ex", line: 66]},
    {Ecto.Repo.Supervisor, :init, 1, [file: ~c"lib/ecto/repo/supervisor.ex", line: 185]},
    {:supervisor, :init, 1, [file: ~c"supervisor.erl", line: 330]},
    {:gen_server, :init_it, 2, [file: ~c"gen_server.erl", line: 962]}
  ]}}

In reply to @b00tr:matrix.org
Is it possible to undefine/unset/destroy a module?

In reply to @Nicd-:matrix.org
https://www.erlang.org/doc/man/code#delete-1 and purge/soft_purge do something like that

I'm trying to use the Memento library to store data in Mnesia... unfortunately I get errors when trying to create a table

[error: {:bad_type, Hipdster.Auth.User, {:index, [{2, :ordered}]}}]

I'm trying to use the Memento library to store data in Mnesia... unfortunately I get errors when trying to create a table

[error: {:bad_type, Hipdster.Auth.User, {:index, [{2, :ordered}]}}]

In reply to @shreyan:beeper.com

I'm trying to use the Memento library to store data in Mnesia... unfortunately I get errors when trying to create a table

[error: {:bad_type, Hipdster.Auth.User, {:index, [{2, :ordered}]}}]

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


  # You can also define other methods
  # or helper functions in the module
end

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