Use #data_source_exists? instead of #table_exists?

DEPRECATION WARNING: #table_exists? currently checks both tables and
views. This behavior is deprecated and will be changed with Rails 5.1
to only check tables. Use #data_source_exists? instead.

config/initializers/devise.rb

@@ -12,7 +12,7 @@ Devise.setup do |config|
   # Configure the e-mail address which will be shown in Devise::Mailer,
   # note that it will be overwritten if you use your own mailer class
   # with default "from" parameter.
-  if Rails.env.test? || !ActiveRecord::Base.connection.table_exists?("settings")
+  if Rails.env.test? || !ActiveRecord::Base.connection.data_source_exists?("settings")
     config.mailer_sender = "noreply@consul.dev"
   else
     config.mailer_sender = "'#{Setting["mailer_from_name"]}' <#{Setting["mailer_from_address"]}>"

db/migrate/20150822095305_create_verified_users.rb

@@ -1,6 +1,6 @@
 class CreateVerifiedUsers < ActiveRecord::Migration
   def change
-    unless ActiveRecord::Base.connection.table_exists? 'verified_users'
+    unless ActiveRecord::Base.connection.data_source_exists?("verified_users")
       create_table :verified_users do |t|
         t.string :document_number
         t.string :document_type