How to use provide_default_values method in autotest

Best Python code snippet using autotest_python

rdb_model_extensions.py

Source:rdb_model_extensions.py

...57            if type(field) == dbmodels.BooleanField and field.name in data:58                data[field.name] = bool(data[field.name])59    # TODO(showard) - is there a way to not have to do this?60    @classmethod61    def provide_default_values(cls, data):62        """\63        Provide default values for fields with default values which have64        nothing passed in.65        For CharField and TextField fields with "blank=True", if nothing66        is passed, we fill in an empty string value, even if there's no67        :retab default set.68        """69        new_data = dict(data)70        field_dict = cls.get_field_dict()71        for name, obj in field_dict.iteritems():72            if data.get(name) is not None:73                continue74            if obj.default is not dbmodels.fields.NOT_PROVIDED:75                new_data[name] = obj.default76            elif (isinstance(obj, dbmodels.CharField) or77                  isinstance(obj, dbmodels.TextField)):78                new_data[name] = ''79        return new_data80    @classmethod81    def validate_field_names(cls, data):82        'Checks for extraneous fields in data.'83        errors = {}84        field_dict = cls.get_field_dict()85        for field_name in data:86            if field_name not in field_dict:87                errors[field_name] = 'No field of this name'88        return errors89    @classmethod90    def prepare_data_args(cls, data):91        'Common preparation for add_object and update_object'92        # must check for extraneous field names here, while we have the93        # data in a dict94        errors = cls.validate_field_names(data)95        if errors:96            raise django_exceptions.ValidationError(errors)97        return data98    @classmethod99    def _get_required_field_names(cls):100        """Get the fields without which we cannot create a host.101        @return: A list of field names that cannot be blank on host creation.102        """103        return [field.name for field in cls._meta.fields if not field.blank]104    @classmethod105    def get_basic_field_names(cls):106        """Get all basic fields of the Model.107        This method returns the names of all fields that the client can provide108        a value for during host creation. The fields not included in this list109        are those that we can leave blank. Specifying non-null values for such110        fields only makes sense as an update to the host.111        @return A list of basic fields.112            Eg: set([hostname, locked, leased, status, invalid,113                     protection, lock_time, dirty])114        """115        return [field.name for field in cls._meta.fields116                if field.has_default()] + cls._get_required_field_names()117    @classmethod118    def validate_model_fields(cls, data):119        """Validate parameters needed to create a host.120        Check that all required fields are specified, that specified fields121        are actual model values, and provide defaults for the unspecified122        but unrequired fields.123        @param dict: A dictionary with the args to create the model.124        @raises dajngo_exceptions.ValidationError: If either an invalid field125            is specified or a required field is missing.126        """127        missing_fields = set(cls._get_required_field_names()) - set(data.keys())128        if missing_fields:129            raise django_exceptions.ValidationError('%s required to create %s, '130                    'supplied %s ' % (missing_fields, cls.__name__, data))131        data = cls.prepare_data_args(data)132        data = cls.provide_default_values(data)133        return data134class AbstractHostModel(dbmodels.Model, ModelValidators):135    """Abstract model specifying all fields one can use to create a host.136    This model enforces consistency between the host models of the rdb and137    their representation on the client side.138    Internal fields:139        status: string describing status of host140        invalid: true if the host has been deleted141        protection: indicates what can be done to this host during repair142        lock_time: DateTime at which the host was locked143        dirty: true if the host has been used without being rebooted144        lock_reason: The reason for locking the host.145    """146    Status = host_states.Status...

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