Add follower_address to users, add on generation.

priv/repo/migrations/20170719152213_add_follower_address_to_user.exs

@@ -0,0 +1,33 @@
+defmodule Pleroma.Repo.Migrations.AddFollowerAddressToUser do
+  use Ecto.Migration
+  import Ecto.Query
+  import Supervisor.Spec
+  alias Pleroma.{Repo, User}
+
+  def up do
+    alter table(:users) do
+      add :follower_address, :string, unique: true
+    end
+    flush()
+
+    children = [
+      # Start the endpoint when the application starts
+      supervisor(Pleroma.Web.Endpoint, [])
+    ]
+    opts = [strategy: :one_for_one, name: Pleroma.Supervisor]
+    Supervisor.start_link(children, opts)
+
+    Enum.each(Repo.all(User), fn (user) ->
+      if !user.follower_address do
+        cs = Ecto.Changeset.change(user, %{follower_address: User.ap_followers(user)})
+        Repo.update!(cs)
+      end
+    end)
+  end
+
+  def down do
+    alter table(:users) do
+      remove :follower_address
+    end
+  end
+end