From 07b694814ee98c1062c12140245c48ddc22275ec Mon Sep 17 00:00:00 2001
From: Roger Braun <roger@rogerbraun.net>
Date: Tue, 12 Sep 2017 13:48:48 +0200
Subject: [PATCH] Optimize conversation fetching.

---
 lib/pleroma/web/activity_pub/activity_pub.ex              | 2 +-
 priv/repo/migrations/20170912114248_add_context_index.exs | 8 ++++++++
 2 files changed, 9 insertions(+), 1 deletion(-)
 create mode 100644 priv/repo/migrations/20170912114248_add_context_index.exs

diff --git a/lib/pleroma/web/activity_pub/activity_pub.ex b/lib/pleroma/web/activity_pub/activity_pub.ex
index e3dce9cba..5acbb859e 100644
--- a/lib/pleroma/web/activity_pub/activity_pub.ex
+++ b/lib/pleroma/web/activity_pub/activity_pub.ex
@@ -96,7 +96,7 @@ def delete(%Object{data: %{"id" => id, "actor" => actor}} = object, local \\ tru
 
   def fetch_activities_for_context(context) do
     query = from activity in Activity,
-      where: fragment("? @> ?", activity.data, ^%{ type: "Create", context: context }),
+      where: fragment("?->>'type' = ? and ?->>'context' = ?", activity.data, "Create", activity.data, ^context),
       order_by: [desc: :inserted_at]
     Repo.all(query)
   end
diff --git a/priv/repo/migrations/20170912114248_add_context_index.exs b/priv/repo/migrations/20170912114248_add_context_index.exs
new file mode 100644
index 000000000..83c585136
--- /dev/null
+++ b/priv/repo/migrations/20170912114248_add_context_index.exs
@@ -0,0 +1,8 @@
+defmodule Pleroma.Repo.Migrations.AddContextIndex do
+  use Ecto.Migration
+  @disable_ddl_transaction true
+
+  def change do
+    create index(:activities, ["(data->>'type')", "(data->>'context')"], name: :activities_context_index, concurrently: true)
+  end
+end