Is there a way to rollback a specific migration and only that one (“skipping” all the other ones)? Would mix ecto.rollback -v 20080906120000 accomplish that?

I believe you can’t. Here are all the available options as per mix help ecto.rollback: ## Command line options • -r, --repo - the repo to rollback • --all - revert all applied migrations • --step / -n - revert n number of applied migrations • --to / -v - revert all migrations down to and i…

You can always make a new migration that just undoes what a prior one did, but still keeps a proper versioned state.

It’s not pretty but this works for me: def rollback(version) when is_integer(version) do re = ~r/^#{version}_.*\.exs/ path = Application.app_dir(:your_app, Path.join(["priv", "repo", "migrations"])) with {:find, "" <> file} <- {:find, Enum.find(File.ls!(path), &String.match?(&1, re))}, …

Here’s an adapted example from the Ecto.Migrator docs. Ecto.Migrator.with_repo(your_repo, &Ecto.Migrator.run(&1, :down, to: version))

This is incorrect! This will still run all migrations between the version desired and the current version.

this i think is the most helpful answer

Elixir Programming Language Forum

How to rollback a specific ecto migration?

Questions & Help Questions

jaysoifer January 15, 2017, 5:55pm 3

That makes sense. Just wanted to confirm it.

Thank you