Merge branch 'refactor/db-not-null-constraints-for-oauth_tokens' into 'develop'

Add NOT NULL constraints for oauth_tokens table

See merge request pleroma/pleroma!1901

priv/repo/migrations/20191026191401_set_not_null_for_oauth_tokens.exs

@@ -0,0 +1,15 @@
+defmodule Pleroma.Repo.Migrations.SetNotNullForOauthTokens do
+  use Ecto.Migration
+
+  # modify/3 function will require index recreation, so using execute/1 instead
+
+  def up do
+    execute("ALTER TABLE oauth_tokens
+    ALTER COLUMN app_id SET NOT NULL")
+  end
+
+  def down do
+    execute("ALTER TABLE oauth_tokens
+    ALTER COLUMN app_id DROP NOT NULL")
+  end
+end