Elixir: [Mix] Ignore aliases command

[yordis]

Environment

• Elixir & Erlang versions (elixir --version):
  Erlang/OTP 20 [erts-9.0] [source] [64-bit] [smp:4:4] [ds:4:4:10] [async-threads:10] [hipe] [kernel-poll:false] [dtrace]
  Elixir 1.5.1

• Operating system: macOS Sierra 10.12.6

Current behavior

On Cargo app,

# config.exs
config :straw_hat_cargo,
  ecto_repos: [
    StrawHat.Cargo.Repo,
    StrawHat.IAM.Repo,
    StrawHat.Map.Repo
  ]

# mix.exs
defp aliases do
    [
      "ecto.setup": [
        "ecto.create -r StrawHat.Cargo.Repo",
        "ecto.create -r StrawHat.Map.Repo",
        "ecto.create -r StrawHat.IAM.Repo",

        "ecto.migrate -r StrawHat.Cargo.Repo",
        "ecto.migrate -r StrawHat.Map.Repo",
        "ecto.migrate -r StrawHat.IAM.Repo",

        "run priv/repo/seeds.exs"
      ],
      "ecto.reset": [
        "ecto.drop -r StrawHat.Cargo.Repo",
        "ecto.drop -r StrawHat.Map.Repo",
        "ecto.drop -r StrawHat.IAM.Repo",

        "ecto.setup"
      ],
      "test": ["ecto.create --quiet", "ecto.migrate", "test"],
    ]
  end

Console output

Compiling 26 files (.ex)
Generated straw_hat_cargo app
The database for StrawHat.Cargo.Repo has been dropped
The database for StrawHat.Cargo.Repo has been created

16:49:58.180 [info]  == Running StrawHat.Cargo.Repo.Migrations.CreateWarehouseTable.change/0 forward

# keep going until it failed because of the database setup is wrong

Expected behavior

I am running mix ecto.reset it should run all the commands so I should see that it drops the 3 repos and then create 3 repos and then run the migration for each repo.

[josevalim]

@yordis the issue is that Mix tasks were designed to run only once. So follow up calls are not going to work. Instead pass the -r flag multiple times. I will improve the docs for the Ecto tasks. :heart:

[yordis]

@josevalim if I do multiple call manually would work? Just thinking in the use case that I dont have some task like the Ecto once that allow me to pass multiple values

[josevalim]

@yordis you can use something like Mix.Task.rerun or reenable to be able to call it again.

[yordis]

@josevalim is that documented? That would be nice to highlight

[josevalim]

Those functions and how tasks behave are all documented.