Python django.db.models 模块，TextField() 实例源码

def clean(self):
        strip_types = (models.CharField,
                       models.TextField,
                       models.URLField,
                       models.EmailField,
                       models.IPAddressField,
                       models.GenericIPAddressField,
                       models.SlugField)

        for field in self._meta.fields:
            # TODO: hardcode 'notes' here
            if not (field.name is 'notes') and isinstance(field, strip_types):
                value = getattr(self, field.name)
                if value:
                    setattr(self, field.name,
                            value.replace('\t', ' ').replace('\n', ' ').replace('\r', ' '))

def instantiate_object_id_field(object_id_class_or_tuple=models.TextField):
    """
    Instantiates and returns a model field for FieldHistory.object_id.

    object_id_class_or_tuple may be either a Django model field class or a
    tuple of (model_field, kwargs), where kwargs is a dict passed to
    model_field's constructor.
    """
    if isinstance(object_id_class_or_tuple, (list, tuple)):
        object_id_class, object_id_kwargs = object_id_class_or_tuple
    else:
        object_id_class = object_id_class_or_tuple
        object_id_kwargs = {}

    if not issubclass(object_id_class, models.fields.Field):
        raise TypeError('settings.%s must be a Django model field or (field, kwargs) tuple' % OBJECT_ID_TYPE_SETTING)
    if not isinstance(object_id_kwargs, dict):
        raise TypeError('settings.%s kwargs must be a dict' % OBJECT_ID_TYPE_SETTING)

    return object_id_class(db_index=True, **object_id_kwargs)

def __str__(self):
        return self.caption


# class Cpu(models.Model):
#     # host = models.OneToOneField('Host')   ????
#     server = models.ForeignKey('Host')
#     cpu_model = models.CharField(verbose_name='CPU??', max_length=128,null=True)
#     cpu_count = models.SmallIntegerField(verbose_name='??CPU??',null=True)
#     cpu_core_count = models.SmallIntegerField(verbose_name='CPU???',null=True)
#     use = models.CharField(verbose_name='???',max_length=32,null=True)
#     memo = models.TextField(verbose_name='??', null=True,)
#     create_date = models.DateTimeField(auto_now_add=True, verbose_name='????')
#     update_date = models.DateTimeField(auto_now=True, null=True, verbose_name='????')
#
#     class Meta:
#         db_table = 'Cpu'
#         verbose_name = 'CPU??'
#         verbose_name_plural = verbose_name
#         # unique_together=("host","cpu_model")    ????
#
#     def __str__(self):
#         return self.cpu_model

def setUp(self):

        class TextDocument(models.Model):
            body = models.TextField()
            other = models.TextField()
            search = SearchVectorField([
                WeightedColumn('body', 'D'),
            ], 'english')

        class TextDocumentLanguageColumn(models.Model):
            body = models.TextField()
            lang = models.TextField(null=True)
            search = SearchVectorField([
                WeightedColumn('body', 'D'),
            ], language_column='lang', language='english')

        with DatabaseSchemaEditor(connection) as schema_editor:
            schema_editor.create_model(TextDocument)
            schema_editor.create_model(TextDocumentLanguageColumn)

        self.create = TextDocument.objects.create
        self.lang = TextDocumentLanguageColumn.objects.create

def setUp(self):

        class TextDocument(models.Model):
            title = models.CharField(max_length=128)
            body = models.TextField()
            search = SearchVectorField([
                WeightedColumn('title', 'A'),
                WeightedColumn('body', 'D'),
            ], 'english')

        with DatabaseSchemaEditor(connection) as schema_editor:
            schema_editor.create_model(TextDocument)

        TextDocument.objects.create(
            title="My hovercraft is full of eels.",
            body="Spam! Spam! Spam! Spam! Spam! Spam!",
        )
        TextDocument.objects.create(
            title="Spam! Spam! Spam! Spam! Spam! Spam!",
            body="My hovercraft is full of eels."
        )
        self.objects = TextDocument.objects

def setUp(self):

        class TextDocument(models.Model):
            title = models.CharField(max_length=128)
            body = models.TextField()
            search = SearchVectorField([
                WeightedColumn('title', 'A'),
                WeightedColumn('body', 'D'),
            ], 'english')

        with DatabaseSchemaEditor(connection) as schema_editor:
            schema_editor.create_model(TextDocument)

        TextDocument.objects.create(
            title="My hovercraft is full of eels.",
            body="Spam! Spam! Spam! Spam! Spam! Spam!",
        )
        TextDocument.objects.create(
            title="Spam! Spam! Spam! Spam! Spam! Spam!",
            body="My hovercraft is full of eels."
        )
        self.objects = TextDocument.objects

def _categorization_translated_fields():
    return TranslatedFields(
        name=models.CharField(
            _('Name'),
            max_length=128,
        ),
        slug=models.SlugField(
            _('Slug'),
            db_index=True,
        ),
        description=models.TextField(
            _('Description'),
            blank=True,
            help_text=_("Description of a categorization, usually used as lead text in categorization's detail view."),
        ),
        meta={
            'unique_together': [('language_code', 'slug')],
        },
    )

def inbox_count_for(user):
    """
    returns the number of unread messages for the given user but does not
    mark them seen
    """
    return Message.objects.filter(recipient=user, read_at__isnull=True, recipient_deleted_at__isnull=True).count()


# class GroupMessage(models.Model):
#     subject = models.CharField(_("Subject"), max_length=120)
#     body = models.TextField(_("Body"))
#     sender = models.ForeignKey(AUTH_USER_MODEL, related_name='sent_messages', verbose_name=_("Sender"))
#     recipient = models.ForeignKey(AUTH_USER_MODEL, related_name='received_messages', null=True, blank=True, verbose_name=_("Recipient"))

#     sent_at = models.DateTimeField(_("sent at"), null=True, blank=True)
#     objects = MessageManager()

#     class Meta:
#         ordering = ['-sent_at']
#         verbose_name = _("GroupMessage")
#         verbose_name_plural = _("GroupMessages")   


# fallback for email notification if django-notification could not be found

def delete_stale_entries(self):
        if self.model._meta.parents:
            # We don’t need to delete stale entries for non-root models,
            # since we already delete them by deleting roots.
            return
        existing_pks = (self.model._default_manager.using(self.db_alias)
                        .annotate(object_id=Cast('pk', TextField()))
                        .values('object_id'))
        stale_entries = (IndexEntry._default_manager.using(self.db_alias)
                         .for_models(self.model)
                         .exclude(object_id__in=existing_pks))
        stale_entries.delete()

def types_text(self):
        return self.filter(type='TextField')

def __init__(self, *args, **kwargs):
        super(SimpleMdeField, self).__init__(*args, **kwargs)
        # using SimpleMdeWidget for TextField
        self.widget = SimpleMdeWidget()

def output_field(self):
        return TextField()

def test(cls, field, request, params, model, admin_view, field_path):
        return (
                isinstance(field, models.CharField)
                and field.max_length > 20
                or isinstance(field, models.TextField)
               )

def test(cls, field, request, params, model, admin_view, field_path):
        return (
                isinstance(field, models.CharField)
                and field.max_length > 20
                or isinstance(field, models.TextField)
               )

def test(cls, field, request, params, model, admin_view, field_path):
        return (isinstance(field, models.CharField) and field.max_length > 20) or isinstance(field, models.TextField)

def test(cls, field, request, params, model, admin_view, field_path):
        return (
                isinstance(field, models.CharField)
                and field.max_length > 20
                or isinstance(field, models.TextField)
               )

def test(cls, field, request, params, model, admin_view, field_path):
        return (
                isinstance(field, models.CharField)
                and field.max_length > 20
                or isinstance(field, models.TextField)
               )

def test_object_id_field_type_requires_kwargs_as_dict(self):
        object_id_tuple_bad_kwargs = (models.TextField, 10)
        self.assertRaises(TypeError, lambda: instantiate_object_id_field(object_id_tuple_bad_kwargs))

def get_queryset(self, request):
        qs = super(CommentAdmin, self).get_queryset(request)
        if django.VERSION >= (1, 8):
            # Concat is not available in 1.7 and 1.6
            qs = qs.annotate(author_sort=Concat('author_type', 'author_id', output_field=TextField()))
            qs = qs.annotate(page_sort=Concat('page_type', 'page_id', output_field=TextField()))
        return qs

def test(cls, field, request, params, model, admin_view, field_path):
        return (isinstance(field, models.CharField) and field.max_length > 20) or isinstance(field, models.TextField)

def diff_field(self, name, old, new, **kwargs):
        old_val = getattr(old, name, None)
        new_val = getattr(new, name, None)

        if old_val == new_val:
            return None

        try:
            field = self.model._meta.get_field(name)
        except models.FieldDoesNotExist:
            field = None

        if isinstance(field, models.ForeignKey):
            return diff_model_instances(old_val, new_val, model=field.rel.to, **kwargs)
        elif isinstance(new_val, (Manager, QuerySet)) or isinstance(old_val, (Manager, QuerySet)):
            old_val = list(old_val.all()) if old else []
            new_val = list(new_val.all()) if new else []
            if not old_val and not new_val:
                return None
            return ListDiffNode(old_val, new_val, **kwargs)
        elif field is not None and field.choices:
            old_val = str(dict(field.choices)[old_val]) if old_val else _('No Information')
            new_val = str(dict(field.choices)[new_val]) if new_val else _('No Information')
            return AtomicDiffNode(old_val, new_val, **kwargs)
        elif isinstance(field, (models.CharField, models.TextField)) and old_val and new_val:
            return TextDiffNode(old_val, new_val, **kwargs)
        else:
            return AtomicDiffNode(_render_value(old_val), _render_value(new_val), **kwargs)

def get_field_style(self, attrs, db_field, style, **kwargs):
        if style == 'ueditor':
            if isinstance(db_field, UEditorField):
                widget = db_field.formfield().widget
                param = {}
                param.update(widget.ueditor_settings)
                param.update(widget.attrs)
                return {'widget': XadminUEditorWidget(**param)}
            if isinstance(db_field, TextField):
                return {'widget': XadminUEditorWidget}
        return attrs

def get_field_cls(self, field):
        str_fields = (models.CharField, models.TextField, models.UUIDField)
        if isinstance(field, str_fields):
            return StrField
        elif isinstance(field, (models.AutoField, models.IntegerField)):
            return IntField
        elif isinstance(field, (models.BooleanField, models.NullBooleanField)):
            return BoolField
        elif isinstance(field, (models.DecimalField, models.FloatField)):
            return FloatField
        elif isinstance(field, models.DateTimeField):
            return DateTimeField
        elif isinstance(field, models.DateField):
            return DateField
        return DjangoQLField

def test_should_text_convert_string():
    assert_conversion(models.TextField, graphene.String)

def get_internal_type(self):
        return "TextField"

def test(cls, field, request, params, model, admin_view, field_path):
        return isinstance(field, models.CharField) or isinstance(field, models.TextField)

def test_obfuscate_return(self):
        self.assertEqual(
            ObfuscatorUtils.obfuscate(models.TextField(), 'unittest'),
            '26a824a52b35848551eb7fc48f552635170b52f9857f9f8cddcc0ae2')

def __init__(self, *args, **kwargs):
        warnings.warn("Django 1.9 features a native JsonField, this JSONField will "
                      "be removed somewhere after Django 1.8 becomes unsupported.",
                      DeprecationWarning)
        kwargs['default'] = kwargs.get('default', dict)
        models.TextField.__init__(self, *args, **kwargs)

def get_prep_value(self, value):
        if not isinstance(value, six.string_types):
            return dumps(value)
        return super(models.TextField, self).get_prep_value(value)

def test(cls, field, request, params, model, admin_view, field_path):
        return (isinstance(field, models.CharField) and field.max_length > 20) or isinstance(field, models.TextField)

def field_needs_nullability_check(self, field):
        if isinstance(field, (models.CharField, models.TextField)):
            if field.blank and not field.null:
                return True

        return False



    # Deserialize JSON to Django Model objects.
    # obj: Model object to update (for PUT), newly created object (for POST)
    # values: Python dict of {field name: value} (parsed JSON)
    # Output: Python dict representation of the updated object

def field_needs_nullability_check(self, field):
        if isinstance(field, (models.CharField, models.TextField)):
            if field.blank and not field.null:
                return True

        return False



    # Deserialize JSON to Django Model objects.
    # obj: Model object to update (for PUT), newly created object (for POST)
    # values: Python dict of {field name: value} (parsed JSON)
    # Output: Python dict representation of the updated object

def _find_textual_columns(self):
        columns = []
        # PostgreSQL trigger only has access to fields in the table, so we
        # need to make sure to exclude any fields from multi-table inheritance
        for field in self.model._meta.get_fields(include_parents=False):
            # too restrictive?
            if isinstance(field, (CharField, TextField)):
                columns.append(field.column)
        return columns

def __init__(self, field, query, config=None, options=None, **extra):
        expressions = [field, query]
        if config:
            expressions.insert(0, Value(config))
        if options:
            expressions.append(Value(options))
        extra.setdefault('output_field', models.TextField())
        super().__init__(*expressions, **extra)

def test_http_user_agent(self):
        field = ServeLog._meta.get_field('http_user_agent')
        self.assertModelField(field, models.TextField, True, False)

def test(cls, field, request, params, model, admin_view, field_path):
        return (isinstance(field, models.CharField) and field.max_length > 20) or isinstance(field, models.TextField)

def get_translatable_content(self):
        """
        Returns {field_name: field_contents} for translatable fields, where
        field_contents > ''
        """
        fields = (f for f in self._meta.fields
                  if isinstance(f, (models.CharField, models.TextField)) and
                     f.editable and not f.choices and
                     f.name not in self.translatable_content_excluded_fields)
        return dict(filter(itemgetter(1),
                           ((f.name, getattr(self, f.name)) for f in fields)))

def test(cls, field, request, params, model, admin_view, field_path):
        return (isinstance(field, models.CharField) and field.max_length > 20) or isinstance(field, models.TextField)

def contribute_to_class(self, cls, name):
        if self.auto_create_html_field and not cls._meta.abstract:
            self.html_field = models.TextField(editable=False, blank=True)
            self.html_field.creation_counter = self.creation_counter + 1
            cls.add_to_class('_{}_html'.format(name), self.html_field)
        super(PandocField, self).contribute_to_class(cls, name)
        setattr(cls, name, self)

def test(cls, field, request, params, model, admin_view, field_path):
        return (isinstance(field, models.CharField) and field.max_length > 20) or isinstance(field, models.TextField)

def clean(self):
        """
        Cleans white space from CharFields and TextFields
        """
        for field in self._meta.fields:
            if isinstance(field, (models.CharField, models.TextField)):
                value = getattr(self, field.name)
                if value:
                    setattr(self, field.name, value.strip())

def clean(self):
        """
        Cleans white space from CharFields and TextFields
        """
        for field in self._meta.fields:
            if isinstance(field, (models.CharField, models.TextField)):
                value = getattr(self, field.name)
                if value:
                    setattr(self, field.name, value.strip())

def create_news_abc(schedule_model):
    """Abstract base news model factory.

    :param schedule_model: Schedule model to use as news's schedule.
    :type schedule_model: Any concrete schedule model of abc models from
        :func:`~create_abc_schedule` factory function.
    :returns: A abstract base news model.
    :rtype: Abstract base django model of
        :class:`~news.models.AbstractNews` implementation

    """
    class AbstractBaseNews(models.Model, AbstractNews):
        schedule = models.ForeignKey(
            schedule_model, related_name='news_list',
            db_index=True
        )

        parent = models.ForeignKey(
            'self', related_name='children',
            db_index=True, blank=True, null=True
        )

        url = models.URLField()
        author = models.CharField(max_length=AUTHOR_MAX_LENGTH, null=True)
        title = models.CharField(max_length=TITLE_MAX_LENGTH)
        summary = models.TextField()
        content = models.TextField()
        image = models.URLField(null=True)
        published = models.DateTimeField(blank=True, null=True)
        created = models.DateTimeField(auto_now_add=True)
        updated = models.DateTimeField(auto_now=True)

        class Meta:
            abstract = True
            unique_together = (('schedule', 'url'),)
    return AbstractBaseNews

def __str__(self):
        return self.title
    # ?????????? TextField?
    # ????????????? CharField?
    # ????????????????????
    # ???? TextField ????????

def test(cls, field, request, params, model, admin_view, field_path):
        return (
                isinstance(field, models.CharField)
                and field.max_length > 20
                or isinstance(field, models.TextField)
               )

def test_help_text_field(self):
        """
        The model should have a help_text field
        """
        field = OmniField._meta.get_field('help_text')
        self.assertIsInstance(field, models.TextField)
        self.assertTrue(field.blank)
        self.assertTrue(field.null)

def test_initial(self):
        """
        The model should have an initial field
        """
        field = OmniCharField._meta.get_field('initial')
        self.assertIsInstance(field, models.TextField)
        self.assertTrue(field.blank)
        self.assertTrue(field.null)

def test_recipients_field(self):
        """
        The model should define a recipients field
        """
        field = OmniFormEmailHandler._meta.get_field('recipients')
        self.assertIsInstance(field, models.TextField)
        self.assertFalse(field.blank)
        self.assertFalse(field.null)

def test_template_field(self):
        """
        The model should define a template field
        """
        field = OmniFormEmailHandler._meta.get_field('template')
        self.assertIsInstance(field, models.TextField)
        self.assertFalse(field.blank)
        self.assertFalse(field.null)

def get_concrete_class_for_model_field(cls, model_field):
        """
        Method for getting a concrete model class to represent the type of form field required

        :param model_field: Model Field instance
        :return: OmniField subclass
        """
        field_mapping = {
            models.CharField: OmniCharField,
            models.TextField: OmniCharField,
            models.BooleanField: OmniBooleanField,
            models.NullBooleanField: OmniBooleanField,
            models.DateField: OmniDateField,
            models.DateTimeField: OmniDateTimeField,
            models.DecimalField: OmniDecimalField,
            models.EmailField: OmniEmailField,
            models.FloatField: OmniFloatField,
            models.IntegerField: OmniIntegerField,
            models.BigIntegerField: OmniIntegerField,
            models.PositiveIntegerField: OmniIntegerField,
            models.PositiveSmallIntegerField: OmniIntegerField,
            models.SmallIntegerField: OmniIntegerField,
            models.CommaSeparatedIntegerField: OmniCharField,
            models.TimeField: OmniTimeField,
            models.URLField: OmniUrlField,
            models.ForeignKey: OmniForeignKeyField,
            models.ManyToManyField: OmniManyToManyField,
            models.SlugField: OmniSlugField,
            models.FileField: OmniFileField,
            models.ImageField: OmniImageField,
            models.DurationField: OmniDurationField,
            models.GenericIPAddressField: OmniGenericIPAddressField
        }
        field_mapping.update(cls.get_custom_field_mapping())
        return field_mapping.get(model_field.__class__)