I’m following the approach from this post to make my release_tasks module which is as follows:

defmodule :release_tasks do
  def migrate do
    {:ok, _} = Application.load(:myapp)
    Enum.map(Application.spec(:myapp, :applications), &Application.load(&1))
    Enum.map(Application.spec(:myapp, :applications), &Application.ensure_all_started(&1))

    path = Application.app_dir(:myapp, "priv/repo/migrations")

    Ecto.Migrator.run(MyApp.Repo, path, :up, all: true)

    :init.stop()
  end
end

When I try to run the task I get configuration for MyApp.Repo not specified in :myapp environment error which I’m having trouble to explain:

 {"init terminating in do_boot",{#{'__exception__'=>true,'__struct__'=>'Elixir.ArgumentError',message=><<"configuration for MyApp.Repo not specified in :myapp environment">>},[{'Elixir.Ecto.Repo.Supervisor',config,3,[{file,"lib/ecto/repo/supervisor.ex"},{line,23}]},{'Elixir.Ecto.Migration.SchemaMigration',get_source,1,[]},{'Elixir.Ecto.Migration.SchemaMigration',create_migrations_table,3,[{file,"lib/ecto/migration/schema_migration.ex"},{line,38}]},{'Elixir.Ecto.Migrator',migrated_versions,2,[{file,"lib/ecto/migrator.ex"},{line,43}]},{'Elixir.Ecto.Migrator',run,4,[{file,"lib/ecto/migrator.ex"},{line,142}]},{release_tasks,migrate,0,[{file,"lib/release_tasks.ex"},{line,9}]},{init,start_it,1,[]},{init,start_em,1,[]}]}}

In release sys.config Elixir.MyApp.Repo is present under myapp.

What’s happening?

Any ideas appreciated!