Add role to users

app/models/user.rb

@@ -1,4 +1,11 @@
 class User < ApplicationRecord
+  enum role: [:user, :moderator, :admin]
+  after_initialize :set_default_role, if: :new_record?
+
+  def set_default_role
+    self.role ||= :user
+  end
+
   devise :database_authenticatable, :registerable,
          :recoverable, :rememberable, :validatable,
          :confirmable

db/migrate/20190818191513_add_role_to_users.rb

@@ -0,0 +1,5 @@
+class AddRoleToUsers < ActiveRecord::Migration[6.0]
+  def change
+    add_column :users, :role, :integer
+  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: 2019_08_18_162602) do
+ActiveRecord::Schema.define(version: 2019_08_18_191513) do
 
   # These are extensions that must be enabled in order to support this database
   enable_extension "plpgsql"
@@ -27,6 +27,7 @@ ActiveRecord::Schema.define(version: 2019_08_18_162602) do
     t.string "unconfirmed_email"
     t.datetime "created_at", precision: 6, null: false
     t.datetime "updated_at", precision: 6, null: false
+    t.integer "role"
     t.index ["confirmation_token"], name: "index_users_on_confirmation_token", unique: true
     t.index ["email"], name: "index_users_on_email", unique: true
     t.index ["reset_password_token"], name: "index_users_on_reset_password_token", unique: true