old_contents: from katrid.conf.app_settings import *
  
  DATABASES = {
      'default': {
          'ENGINE': 'katrid.db.backends.sqlite3',
          'NAME': 'db.sqlite3',
      }
  }
  
  AUTH_USER_MODEL = 'base.user'
  
  INSTALLED_APPS.append('keops')
  
  SERIALIZATION_MODULES = {
      'python': 'keops.core.serializers.python',
      'json': 'keops.core.serializers.json',
      'xml': 'keops.core.serializers.xml_serializer',
      'yaml': 'keops.core.serializers.pyyaml',
      'csv': 'keops.core.serializers.csv_serializer',
      'txt': 'keops.core.serializers.txt_serializer',
      'mako': 'keops.core.serializers.mako_serializer',
  }
  
new_contents: from katrid.conf.app_settings import *
  
  DATABASES = {
      'default': {
          'ENGINE': 'katrid.db.backends.sqlite3',
          'NAME': 'db.sqlite3',
      }
  }
  
  AUTH_USER_MODEL = 'base.user'
  
  INSTALLED_APPS.append('keops')
  
  SERIALIZATION_MODULES = {
      'python': 'keops.core.serializers.python',
      'json': 'keops.core.serializers.json',
      'xml': 'keops.core.serializers.xml_serializer',
      'yaml': 'keops.core.serializers.pyyaml',
      'csv': 'keops.core.serializers.csv_serializer',
      'txt': 'keops.core.serializers.txt_serializer',
  }
  
subject: Add exclude fields to model options