From 9e60de695db74bbe66c2be411ec85420b0ff54a7 Mon Sep 17 00:00:00 2001
From: Roger Braun <rbraun@Bobble.local>
Date: Thu, 9 Nov 2017 13:45:17 +0100
Subject: [PATCH] Fix migration for empty db.

---
 .../20171109114020_fill_actor_field.exs       | 21 ++++++++++---------
 1 file changed, 11 insertions(+), 10 deletions(-)

diff --git a/priv/repo/migrations/20171109114020_fill_actor_field.exs b/priv/repo/migrations/20171109114020_fill_actor_field.exs
index d4ac601da..255ca46d5 100644
--- a/priv/repo/migrations/20171109114020_fill_actor_field.exs
+++ b/priv/repo/migrations/20171109114020_fill_actor_field.exs
@@ -5,18 +5,19 @@ defmodule Pleroma.Repo.Migrations.FillActorField do
 
   def up do
     max = Repo.aggregate(Activity, :max, :id)
-    IO.puts("#{max} activities")
-    chunks = 0..(round(max / 10_000))
+    if max do
+      IO.puts("#{max} activities")
+      chunks = 0..(round(max / 10_000))
 
-    Enum.each(chunks, fn (i) ->
-      min = i * 10_000
-      max = min + 10_000
-      IO.puts("Updating #{min}")
-      execute("""
+      Enum.each(chunks, fn (i) ->
+        min = i * 10_000
+        max = min + 10_000
+        execute("""
         update activities set actor = data->>'actor' where id > #{min} and id <= #{max};
-      """)
-      |> IO.inspect
-    end)
+        """)
+        |> IO.inspect
+      end)
+    end
   end
 
   def down do