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How to use convert_human_readable_values method in autotest

Best Python code snippet using autotest_python

model_logic.py

Source:model_logic.py

...432    On deserializion, if the object to persist already exists, local fields433    will only be updated, if their name is in this set.434    """435    @classmethod436    def convert_human_readable_values(cls, data, to_human_readable=False):437        """\438        Performs conversions on user-supplied field data, to make it439        easier for users to pass human-readable data.440        For all fields that have choice sets, convert their values441        from human-readable strings to enum values, if necessary.  This442        allows users to pass strings instead of the corresponding443        integer values.444        For all foreign key fields, call smart_get with the supplied445        data.  This allows the user to pass either an ID value or446        the name of the object as a string.447        If to_human_readable=True, perform the inverse - i.e. convert448        numeric values to human readable values.449        This method modifies data in-place.450        """451        field_dict = cls.get_field_dict()452        for field_name in data:453            if field_name not in field_dict or data[field_name] is None:454                continue455            field_obj = field_dict[field_name]456            # convert enum values457            if field_obj.choices:458                for choice_data in field_obj.choices:459                    # choice_data is (value, name)460                    if to_human_readable:461                        from_val, to_val = choice_data462                    else:463                        to_val, from_val = choice_data464                    if from_val == data[field_name]:465                        data[field_name] = to_val466                        break467            # convert foreign key values468            elif field_obj.rel:469                dest_obj = field_obj.rel.to.smart_get(data[field_name],470                                                      valid_only=False)471                if to_human_readable:472                    # parameterized_jobs do not have a name_field473                    if (field_name != 'parameterized_job' and474                        dest_obj.name_field is not None):475                        data[field_name] = getattr(dest_obj,476                                                   dest_obj.name_field)477                else:478                    data[field_name] = dest_obj479    def _validate_unique(self):480        """\481        Validate that unique fields are unique.  Django manipulators do482        this too, but they're a huge pain to use manually.  Trust me.483        """484        errors = {}485        cls = type(self)486        field_dict = self.get_field_dict()487        manager = cls.get_valid_manager()488        for field_name, field_obj in field_dict.iteritems():489            if not field_obj.unique:490                continue491            value = getattr(self, field_name)492            if value is None and field_obj.auto_created:493                # don't bother checking autoincrement fields about to be494                # generated495                continue496            existing_objs = manager.filter(**{field_name : value})497            num_existing = existing_objs.count()498            if num_existing == 0:499                continue500            if num_existing == 1 and existing_objs[0].id == self.id:501                continue502            errors[field_name] = (503                'This value must be unique (%s)' % (value))504        return errors505    def _validate(self):506        """507        First coerces all fields on this instance to their proper Python types.508        Then runs validation on every field. Returns a dictionary of509        field_name -> error_list.510        Based on validate() from django.db.models.Model in Django 0.96, which511        was removed in Django 1.0. It should reappear in a later version. See:512            http://code.djangoproject.com/ticket/6845513        """514        error_dict = {}515        for f in self._meta.fields:516            try:517                python_value = f.to_python(518                    getattr(self, f.attname, f.get_default()))519            except django.core.exceptions.ValidationError, e:520                error_dict[f.name] = str(e)521                continue522            if not f.blank and not python_value:523                error_dict[f.name] = 'This field is required.'524                continue525            setattr(self, f.attname, python_value)526        return error_dict527    def do_validate(self):528        errors = self._validate()529        unique_errors = self._validate_unique()530        for field_name, error in unique_errors.iteritems():531            errors.setdefault(field_name, error)532        if errors:533            raise ValidationError(errors)534    # actually (externally) useful methods follow535    @classmethod536    def add_object(cls, data={}, **kwargs):537        """\538        Returns a new object created with the given data (a dictionary539        mapping field names to values). Merges any extra keyword args540        into data.541        """542        data = dict(data)543        data.update(kwargs)544        data = cls.prepare_data_args(data)545        cls.convert_human_readable_values(data)546        data = cls.provide_default_values(data)547        obj = cls(**data)548        obj.do_validate()549        obj.save()550        return obj551    def update_object(self, data={}, **kwargs):552        """\553        Updates the object with the given data (a dictionary mapping554        field names to values).  Merges any extra keyword args into555        data.556        """557        data = dict(data)558        data.update(kwargs)559        data = self.prepare_data_args(data)560        self.convert_human_readable_values(data)561        for field_name, value in data.iteritems():562            setattr(self, field_name, value)563        self.do_validate()564        self.save()565    # see query_objects()566    _SPECIAL_FILTER_KEYS = ('query_start', 'query_limit', 'sort_by',567                            'extra_args', 'extra_where', 'no_distinct')568    @classmethod569    def _extract_special_params(cls, filter_data):570        """571        @returns a tuple of dicts (special_params, regular_filters), where572        special_params contains the parameters we handle specially and573        regular_filters is the remaining data to be handled by Django.574        """575        regular_filters = dict(filter_data)576        special_params = {}577        for key in cls._SPECIAL_FILTER_KEYS:578            if key in regular_filters:579                special_params[key] = regular_filters.pop(key)580        return special_params, regular_filters581    @classmethod582    def apply_presentation(cls, query, filter_data):583        """584        Apply presentation parameters -- sorting and paging -- to the given585        query.586        @returns new query with presentation applied587        """588        special_params, _ = cls._extract_special_params(filter_data)589        sort_by = special_params.get('sort_by', None)590        if sort_by:591            assert isinstance(sort_by, list) or isinstance(sort_by, tuple)592            query = query.extra(order_by=sort_by)593        query_start = special_params.get('query_start', None)594        query_limit = special_params.get('query_limit', None)595        if query_start is not None:596            if query_limit is None:597                raise ValueError('Cannot pass query_start without query_limit')598            # query_limit is passed as a page size599            query_limit += query_start600        return query[query_start:query_limit]601    @classmethod602    def query_objects(cls, filter_data, valid_only=True, initial_query=None,603                      apply_presentation=True):604        """\605        Returns a QuerySet object for querying the given model_class606        with the given filter_data.  Optional special arguments in607        filter_data include:608        -query_start: index of first return to return609        -query_limit: maximum number of results to return610        -sort_by: list of fields to sort on.  prefixing a '-' onto a611         field name changes the sort to descending order.612        -extra_args: keyword args to pass to query.extra() (see Django613         DB layer documentation)614        -extra_where: extra WHERE clause to append615        -no_distinct: if True, a DISTINCT will not be added to the SELECT616        """617        special_params, regular_filters = cls._extract_special_params(618                filter_data)619        if initial_query is None:620            if valid_only:621                initial_query = cls.get_valid_manager()622            else:623                initial_query = cls.objects624        query = initial_query.filter(**regular_filters)625        use_distinct = not special_params.get('no_distinct', False)626        if use_distinct:627            query = query.distinct()628        extra_args = special_params.get('extra_args', {})629        extra_where = special_params.get('extra_where', None)630        if extra_where:631            # escape %'s632            extra_where = cls.objects.escape_user_sql(extra_where)633            extra_args.setdefault('where', []).append(extra_where)634        if extra_args:635            query = query.extra(**extra_args)636            # TODO: Use readonly connection for these queries.637            # This has been disabled, because it's not used anyway, as the638            # configured readonly user is the same as the real user anyway.639        if apply_presentation:640            query = cls.apply_presentation(query, filter_data)641        return query642    @classmethod643    def query_count(cls, filter_data, initial_query=None):644        """\645        Like query_objects, but retreive only the count of results.646        """647        filter_data.pop('query_start', None)648        filter_data.pop('query_limit', None)649        query = cls.query_objects(filter_data, initial_query=initial_query)650        return query.count()651    @classmethod652    def clean_object_dicts(cls, field_dicts):653        """\654        Take a list of dicts corresponding to object (as returned by655        query.values()) and clean the data to be more suitable for656        returning to the user.657        """658        for field_dict in field_dicts:659            cls.clean_foreign_keys(field_dict)660            cls._convert_booleans(field_dict)661            cls.convert_human_readable_values(field_dict,662                                              to_human_readable=True)663    @classmethod664    def list_objects(cls, filter_data, initial_query=None):665        """\666        Like query_objects, but return a list of dictionaries.667        """668        query = cls.query_objects(filter_data, initial_query=initial_query)669        extra_fields = query.query.extra_select.keys()670        field_dicts = [model_object.get_object_dict(extra_fields=extra_fields)671                       for model_object in query]672        return field_dicts673    @classmethod674    def smart_get(cls, id_or_name, valid_only=True):675        """\...

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