How to run Ecto migrations in Elixir/Phoenix from an `iex -S mix` or production console

migrations_in_console_cheatsheet.exs

# How to run Ecto migrations from IEx console... Examples

# preliminaries assumed in the following code, change to fit your environment:
alias YourAppName.Repo
your_app_name_as_atom = :mpnetwork
downto_version = 20170724182558

# Down:
Ecto.Migrator.run(Repo, "priv/repo/migrations/", :down, [to: downto_version])

# Up:
Ecto.Migrator.run(Repo, "priv/repo/migrations/", :up, [all: true])

# In production when not sure if working directory is inside app dir:

Ecto.Migrator.run(Repo, Application.app_dir(your_app_name_as_atom, "priv/repo/migrations"), :down, [to: downto_version])
Ecto.Migrator.run(Repo, Application.app_dir(your_app_name_as_atom, "priv/repo/migrations"), :up, [all: true])