invoice.py 文件源码

def check_config_for(cls, config_dict, username, require_email_fields=False):
        """Ensures the invoice configuration dictionary `config_dict` contains
        the required fields.

        :param username: Username owning the configuration.
        :param validate_email: Whether to also require email-related fields.
        """
        required_fields = (
            list(sum(cls.required_config_fields, ())) if require_email_fields else
            cls.required_config_fields[0]
        )
        missing_required_fields = [
            field for field in required_fields
            if field not in config_dict
        ]
        if len(missing_required_fields) > 0:
            raise ImproperlyConfigured(
                'The configuration for user %s is missing the following required '
                'fields: %s.\n'
                'Please double-check your configuration.'
                % (username, u', '.join(missing_required_fields))
            )

        return config_dict