Fixed deprication warning.

config/application.rb

@@ -11,6 +11,8 @@ module DVGM
     # Initialize configuration defaults for originally generated Rails version.
     config.load_defaults 5.0
 
+    config.active_record.sqlite3.represent_boolean_as_integer = true
+
     # Settings in config/environments/* take precedence over those specified here.
     # Application configuration can go into files in config/initializers
     # -- all .rb files in that directory are automatically loaded after loading