install action_mailbox

app/mailboxes/application_mailbox.rb

@@ -0,0 +1,3 @@
+class ApplicationMailbox < ActionMailbox::Base
+  # routing /something/i => :somewhere
+end

config/environments/production.rb

@@ -1,4 +1,7 @@
 Rails.application.configure do
+  # Prepare the ingress controller used to receive mail
+  # config.action_mailbox.ingress = :relay
+
   # Settings specified here will take precedence over those in config/application.rb.
 
   # Code is not reloaded between requests.

db/migrate/20201017101817_create_active_storage_tables.active_storage.rb

@@ -0,0 +1,27 @@
+# This migration comes from active_storage (originally 20170806125915)
+class CreateActiveStorageTables < ActiveRecord::Migration[5.2]
+  def change
+    create_table :active_storage_blobs do |t|
+      t.string   :key,        null: false
+      t.string   :filename,   null: false
+      t.string   :content_type
+      t.text     :metadata
+      t.bigint   :byte_size,  null: false
+      t.string   :checksum,   null: false
+      t.datetime :created_at, null: false
+
+      t.index [ :key ], unique: true
+    end
+
+    create_table :active_storage_attachments do |t|
+      t.string     :name,     null: false
+      t.references :record,   null: false, polymorphic: true, index: false
+      t.references :blob,     null: false
+
+      t.datetime :created_at, null: false
+
+      t.index [ :record_type, :record_id, :name, :blob_id ], name: "index_active_storage_attachments_uniqueness", unique: true
+      t.foreign_key :active_storage_blobs, column: :blob_id
+    end
+  end
+end

db/migrate/20201017101818_create_action_mailbox_tables.action_mailbox.rb

@@ -0,0 +1,14 @@
+# This migration comes from action_mailbox (originally 20180917164000)
+class CreateActionMailboxTables < ActiveRecord::Migration[6.0]
+  def change
+    create_table :action_mailbox_inbound_emails do |t|
+      t.integer :status, default: 0, null: false
+      t.string  :message_id, null: false
+      t.string  :message_checksum, null: false
+
+      t.timestamps
+
+      t.index [ :message_id, :message_checksum ], name: "index_action_mailbox_inbound_emails_uniqueness", unique: true
+    end
+  end
+end

db/schema.rb

@@ -0,0 +1,46 @@
+# This file is auto-generated from the current state of the database. Instead
+# of editing this file, please use the migrations feature of Active Record to
+# incrementally modify your database, and then regenerate this schema definition.
+#
+# This file is the source Rails uses to define your schema when running `rails
+# db:schema:load`. When creating a new database, `rails db:schema:load` tends to
+# be faster and is potentially less error prone than running all of your
+# migrations from scratch. Old migrations may fail to apply correctly if those
+# migrations use external dependencies or application code.
+#
+# It's strongly recommended that you check this file into your version control system.
+
+ActiveRecord::Schema.define(version: 2020_10_17_101818) do
+
+  create_table "action_mailbox_inbound_emails", force: :cascade do |t|
+    t.integer "status", default: 0, null: false
+    t.string "message_id", null: false
+    t.string "message_checksum", null: false
+    t.datetime "created_at", precision: 6, null: false
+    t.datetime "updated_at", precision: 6, null: false
+    t.index ["message_id", "message_checksum"], name: "index_action_mailbox_inbound_emails_uniqueness", unique: true
+  end
+
+  create_table "active_storage_attachments", force: :cascade do |t|
+    t.string "name", null: false
+    t.string "record_type", null: false
+    t.integer "record_id", null: false
+    t.integer "blob_id", null: false
+    t.datetime "created_at", null: false
+    t.index ["blob_id"], name: "index_active_storage_attachments_on_blob_id"
+    t.index ["record_type", "record_id", "name", "blob_id"], name: "index_active_storage_attachments_uniqueness", unique: true
+  end
+
+  create_table "active_storage_blobs", force: :cascade do |t|
+    t.string "key", null: false
+    t.string "filename", null: false
+    t.string "content_type"
+    t.text "metadata"
+    t.bigint "byte_size", null: false
+    t.string "checksum", null: false
+    t.datetime "created_at", null: false
+    t.index ["key"], name: "index_active_storage_blobs_on_key", unique: true
+  end
+
+  add_foreign_key "active_storage_attachments", "active_storage_blobs", column: "blob_id"
+end