Remove unneeded indices, improve error handling in background workers, don't needlessly reload reblogged status, send Devise e-mails asynchronously

app/controllers/api/v1/statuses_controller.rb

@@ -54,7 +54,7 @@ class Api::V1::StatusesController < ApiController
   end
 
   def reblog
-    @status = ReblogService.new.call(current_user.account, Status.find(params[:id])).reload
+    @status = ReblogService.new.call(current_user.account, Status.find(params[:id]))
     render action: :show
   end
 

app/models/notification.rb

@@ -11,6 +11,8 @@ class Notification < ApplicationRecord
   belongs_to :follow,    foreign_type: 'Follow',    foreign_key: 'activity_id'
   belongs_to :favourite, foreign_type: 'Favourite', foreign_key: 'activity_id'
 
+  validates :account_id, uniqueness: { scope: [:activity_type, :activity_id] }
+
   STATUS_INCLUDES = [:account, :stream_entry, :media_attachments, :tags, mentions: :account, reblog: [:stream_entry, :account, :media_attachments, :tags, mentions: :account]].freeze
 
   scope :with_includes, -> { includes(status: STATUS_INCLUDES, mention: [status: STATUS_INCLUDES], favourite: [:account, status: STATUS_INCLUDES], follow: :account) }

app/models/user.rb

@@ -16,4 +16,8 @@ class User < ApplicationRecord
   has_settings do |s|
     s.key :notification_emails, defaults: { follow: true, reblog: true, favourite: true, mention: true }
   end
+
+  def send_devise_notification(notification, *args)
+    devise_mailer.send(notification, self, *args).deliver_later
+  end
 end

app/services/notify_service.rb

@@ -10,6 +10,8 @@ class NotifyService < BaseService
 
     create_notification
     send_email if email_enabled?
+  rescue ActiveRecord::RecordInvalid
+    return
   end
 
   private

app/services/process_feed_service.rb

@@ -61,7 +61,7 @@ class ProcessFeedService < BaseService
 
       status.save!
 
-      NotifyService.new.call(status.reblog.account, status) if status.reblog?
+      NotifyService.new.call(status.reblog.account, status) if status.reblog? && status.reblog.account.local?
       Rails.logger.debug "Queuing remote status #{status.id} (#{id}) for distribution"
       DistributionWorker.perform_async(status.id)
       status

app/workers/salmon_worker.rb

@@ -5,5 +5,7 @@ class SalmonWorker
 
   def perform(account_id, body)
     ProcessInteractionService.new.call(body, Account.find(account_id))
+  rescue ActiveRecord::RecordNotFound
+    true
   end
 end

db/migrate/20161122163057_remove_unneeded_indexes.rb

@@ -0,0 +1,7 @@
+class RemoveUnneededIndexes < ActiveRecord::Migration[5.0]
+  def change
+    remove_index :notifications, name: "index_notifications_on_account_id"
+    remove_index :settings, name: "index_settings_on_target_type_and_target_id"
+    remove_index :statuses_tags, name: "index_statuses_tags_on_tag_id"
+  end
+end

db/schema.rb

@@ -10,7 +10,7 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema.define(version: 20161119211120) do
+ActiveRecord::Schema.define(version: 20161122163057) do
 
   # These are extensions that must be enabled in order to support this database
   enable_extension "plpgsql"
@@ -103,7 +103,6 @@ ActiveRecord::Schema.define(version: 20161119211120) do
     t.datetime "created_at",    null: false
     t.datetime "updated_at",    null: false
     t.index ["account_id", "activity_id", "activity_type"], name: "account_activity", unique: true, using: :btree
-    t.index ["account_id"], name: "index_notifications_on_account_id", using: :btree
   end
 
   create_table "oauth_access_grants", force: :cascade do |t|
@@ -152,7 +151,6 @@ ActiveRecord::Schema.define(version: 20161119211120) do
     t.datetime "created_at"
     t.datetime "updated_at"
     t.index ["target_type", "target_id", "var"], name: "index_settings_on_target_type_and_target_id_and_var", unique: true, using: :btree
-    t.index ["target_type", "target_id"], name: "index_settings_on_target_type_and_target_id", using: :btree
   end
 
   create_table "statuses", force: :cascade do |t|
@@ -174,7 +172,6 @@ ActiveRecord::Schema.define(version: 20161119211120) do
     t.integer "status_id", null: false
     t.integer "tag_id",    null: false
     t.index ["tag_id", "status_id"], name: "index_statuses_tags_on_tag_id_and_status_id", unique: true, using: :btree
-    t.index ["tag_id"], name: "index_statuses_tags_on_tag_id", using: :btree
   end
 
   create_table "stream_entries", force: :cascade do |t|