Where does the release module get the version from?

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1

Hi,

In the release module, in rollback fn, can I know how does one get the version or from where? What is the type of version?

def rollback(repo, version) do
    {:ok, _, _} = Ecto.Migrator.with_repo(repo, &Ecto.Migrator.run(&1, :down, to: version))
  end

Thanks :smiley:

2

What do you mean by “release module”?

3

version is an integer, that matches the timestamp in the migration file name. For instance, this example from the docs:

bin/my_app eval "MyApp.Release.rollback(MyApp.Repo, 20190417140000)"

It’s also the value stored in schema_migrations for each completed migration.

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