Fix persistent devise login

app/controllers/users/omniauth_callbacks_controller.rb

@@ -4,6 +4,7 @@ class Users::OmniauthCallbacksController < Devise::OmniauthCallbacksController
   def sign_in_with(provider_name)
     @user = User.from_omniauth(request.env["omniauth.auth"])
     @user.remember_me!
+    @user.remember_me = true
     sign_in_and_redirect @user, event: :authentication
     set_flash_message(:notice, :success, kind: provider_name) if is_navigational_format?
   end

config/initializers/devise.rb

@@ -126,17 +126,17 @@ Devise.setup do |config|
 
   # ==> Configuration for :rememberable
   # The time the user will be remembered without asking for credentials again.
-  # config.remember_for = 2.weeks
+  config.remember_for = 2.weeks
 
   # Invalidates all the remember me tokens when the user signs out.
   config.expire_all_remember_me_on_sign_out = true
 
   # If true, extends the user's remember period when remembered via cookie.
-  # config.extend_remember_period = false
+  config.extend_remember_period = true
 
   # Options to be passed to the created cookie. For instance, you can set
   # secure: true in order to force SSL only cookies.
-  # config.rememberable_options = {}
+  config.rememberable_options = { secure: Rails.env.production? }
 
   # ==> Configuration for :validatable
   # Range for password length.

db/migrate/20190828084343_add_remember_token_to_users.rb

@@ -0,0 +1,5 @@
+class AddRememberTokenToUsers < ActiveRecord::Migration[5.2]
+  def change
+    add_column :users, :remember_token, :string
+  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_02_04_164033) do
+ActiveRecord::Schema.define(version: 2019_08_28_084343) do
 
   create_table "problems", force: :cascade do |t|
     t.datetime "created_at"
@@ -39,6 +39,7 @@ ActiveRecord::Schema.define(version: 2019_02_04_164033) do
     t.datetime "created_at", null: false
     t.datetime "updated_at", null: false
     t.string "name"
+    t.string "remember_token"
   end
 
 end