ash_postgres/priv/test_repo/tenant_migrations/20201028042738_migrate_resources1.exs

defmodule AshPostgres.TestRepo.TenantMigrations.MigrateResources1 do
  @moduledoc """
  Updates resources based on their most recent snapshots.

  This file was autogenerated with `mix ash_postgres.generate_migrations`
  """

  use Ecto.Migration

  def up() do
    tenants =
      if prefix() do
        [prefix()]
      else
        repo().all_tenants()
      end

    for prefix <- tenants do
      create table(:multitenant_posts, primary_key: false, prefix: prefix) do
        add(:id, :binary_id,
          null: true,
          default: fragment("uuid_generate_v4()"),
          primary_key: true
        )

        add(
          :org_id,
          references("multitenant_orgs",
            type: :binary_id,
            column: :id,
            name: "#{prefix}_multitenant_orgs_org_id_fkey",
            prefix: "public"
          ),
          default: nil,
          primary_key: false
        )

        add(:name, :text, null: true, default: nil, primary_key: false)
      end
    end
  end

  def down() do
    tenants =
      if prefix() do
        [prefix()]
      else
        repo().all_tenants()
      end

    for prefix <- tenants do
      drop(table("multitenant_posts", prefix: prefix))
    end
  end
end