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106 lines
3.8 KiB
Elixir
106 lines
3.8 KiB
Elixir
defmodule Mix.Tasks.AshPostgres.Rollback do
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use Mix.Task
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import AshPostgres.Mix.Helpers,
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only: [migrations_path: 2, tenant_migrations_path: 2, tenants: 2]
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@shortdoc "Rolls back the repository migrations for all repositories in the provided (or configured) domains"
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@moduledoc """
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Reverts applied migrations in the given repository.
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Migrations are expected at "priv/YOUR_REPO/migrations" directory
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of the current application but it can be configured by specifying
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the `:priv` key under the repository configuration.
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Runs the latest applied migration by default. To roll back to
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a version number, supply `--to version_number`. To roll back a
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specific number of times, use `--step n`. To undo all applied
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migrations, provide `--all`.
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This is only really useful if your domains only use a single repo.
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If you have multiple repos and you want to run a single migration and/or
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migrate/roll them back to different points, you will need to use the
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ecto specific task, `mix ecto.migrate` and provide your repo name.
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## Examples
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mix ash_postgres.rollback
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mix ash_postgres.rollback -r Custom.Repo
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mix ash_postgres.rollback -n 3
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mix ash_postgres.rollback --step 3
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mix ash_postgres.rollback -v 20080906120000
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mix ash_postgres.rollback --to 20080906120000
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## Command line options
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* `--domains` - the domains who's repos should be rolledback
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* `--all` - revert all applied migrations
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* `--step` / `-n` - revert n number of applied migrations
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* `--to` / `-v` - revert all migrations down to and including version
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* `--quiet` - do not log migration commands
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* `--prefix` - the prefix to run migrations on
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* `--pool-size` - the pool size if the repository is started only for the task (defaults to 1)
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* `--log-sql` - log the raw sql migrations are running
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* `--tenants` - roll back tenant migrations
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* `--only-tenants` - in combo with `--tenants`, only rolls back the provided tenants, e.g `tenant1,tenant2,tenant3`
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* `--except-tenants` - in combo with `--tenants`, does not rollback the provided tenants, e.g `tenant1,tenant2,tenant3`
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"""
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@doc false
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def run(args) do
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{opts, _, _} =
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OptionParser.parse(args,
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switches: [
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all: :boolean,
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step: :integer,
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to: :integer,
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start: :boolean,
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quiet: :boolean,
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prefix: :string,
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pool_size: :integer,
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log_sql: :boolean,
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only_tenants: :string,
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except_tenants: :string
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],
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aliases: [n: :step, v: :to]
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)
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repos = AshPostgres.Mix.Helpers.repos!(opts, args)
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rest_opts =
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args
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|> AshPostgres.Mix.Helpers.delete_arg("--domains")
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|> AshPostgres.Mix.Helpers.delete_arg("--migrations-path")
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|> AshPostgres.Mix.Helpers.delete_flag("--tenants")
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|> AshPostgres.Mix.Helpers.delete_flag("--only-tenants")
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|> AshPostgres.Mix.Helpers.delete_flag("--except-tenants")
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Mix.Task.reenable("ecto.rollback")
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if opts[:tenants] do
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for repo <- repos do
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Ecto.Migrator.with_repo(repo, fn repo ->
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for tenant <- tenants(repo, opts) do
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rest_opts = AshPostgres.Mix.Helpers.delete_arg(rest_opts, "--prefix")
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Mix.Task.run(
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"ecto.rollback",
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["-r", to_string(repo)] ++
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rest_opts ++
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["--prefix", tenant, "--migrations-path", tenant_migrations_path(opts, repo)]
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)
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Mix.Task.reenable("ecto.rollback")
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end
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end)
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end
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else
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for repo <- repos do
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Mix.Task.run(
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"ecto.rollback",
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["-r", to_string(repo)] ++
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rest_opts ++ ["--migrations-path", migrations_path(opts, repo)]
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)
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Mix.Task.reenable("ecto.rollback")
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end
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end
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end
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end
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