Python functions.Length方法代码示例

# 需要导入模块: from django.db.models import functions [as 别名]
# 或者: from django.db.models.functions import Length [as 别名]
def get_queryset(self, base_queryset=RoundsAndLabsQueryset):
        funds = ApplicationBase.objects.filter(path=OuterRef('parent_path'))

        return base_queryset(self.model, using=self._db).type(SubmittableStreamForm).annotate(
            lead=Coalesce(
                F('roundbase__lead__full_name'),
                F('labbase__lead__full_name'),
            ),
            start_date=F('roundbase__start_date'),
            end_date=F('roundbase__end_date'),
            parent_path=Left(F('path'), Length('path') - ApplicationBase.steplen, output_field=CharField()),
            fund=Subquery(funds.values('title')[:1]),
            lead_pk=Coalesce(
                F('roundbase__lead__pk'),
                F('labbase__lead__pk'),
            ),
        ) 

# 需要导入模块: from django.db.models import functions [as 别名]
# 或者: from django.db.models.functions import Length [as 别名]
def test_partial_gin_index_with_tablespace(self):
        with register_lookup(CharField, Length):
            index_name = 'char_field_gin_partial_idx'
            index = GinIndex(
                fields=['field'],
                name=index_name,
                condition=Q(field__length=40),
                db_tablespace='pg_default',
            )
            with connection.schema_editor() as editor:
                editor.add_index(CharFieldModel, index)
                self.assertIn('TABLESPACE "pg_default" ', str(index.create_sql(CharFieldModel, editor)))
            constraints = self.get_constraints(CharFieldModel._meta.db_table)
            self.assertEqual(constraints[index_name]['type'], 'gin')
            with connection.schema_editor() as editor:
                editor.remove_index(CharFieldModel, index)
            self.assertNotIn(index_name, self.get_constraints(CharFieldModel._meta.db_table)) 

# 需要导入模块: from django.db.models import functions [as 别名]
# 或者: from django.db.models.functions import Length [as 别名]
def get_queried_genes(query, max_results):
    matching_genes = GeneInfo.objects.filter(
        Q(gene_id__icontains=query) | Q(gene_symbol__icontains=query)
    ).only('gene_id', 'gene_symbol').order_by(Length('gene_symbol').asc()).distinct()
    return [{'gene_id': gene.gene_id, 'gene_symbol': gene.gene_symbol} for gene in matching_genes[:max_results]] 

# 需要导入模块: from django.db.models import functions [as 别名]
# 或者: from django.db.models.functions import Length [as 别名]
def get_queryset(self):
        return (
            super().get_queryset()
            .filter(url__startswith='/privacy-policy-')
            .annotate(
                version=dbf.Substr(  # Poor man's regex ^/privacy-policy-(.+)/$
                    dbf.Substr('url', 1, dbf.Length('url') - 1, output_field=models.CharField()),
                    len('/privacy-policy-') + 1)
            )
        ) 

# 需要导入模块: from django.db.models import functions [as 别名]
# 或者: from django.db.models.functions import Length [as 别名]
def get_bot_config_size(bot_profile: UserProfile, key: Optional[str]=None) -> int:
    if key is None:
        return BotConfigData.objects.filter(bot_profile=bot_profile) \
                                    .annotate(key_size=Length('key'), value_size=Length('value')) \
                                    .aggregate(sum=Sum(F('key_size')+F('value_size')))['sum'] or 0
    else:
        try:
            return len(key) + len(BotConfigData.objects.get(bot_profile=bot_profile, key=key).value)
        except BotConfigData.DoesNotExist:
            return 0 

# 需要导入模块: from django.db.models import functions [as 别名]
# 或者: from django.db.models.functions import Length [as 别名]
def get_bot_storage_size(bot_profile: UserProfile, key: Optional[str]=None) -> int:
    if key is None:
        return BotStorageData.objects.filter(bot_profile=bot_profile) \
                                     .annotate(key_size=Length('key'), value_size=Length('value')) \
                                     .aggregate(sum=Sum(F('key_size')+F('value_size')))['sum'] or 0
    else:
        try:
            return len(key) + len(BotStorageData.objects.get(bot_profile=bot_profile, key=key).value)
        except BotStorageData.DoesNotExist:
            return 0 

# 需要导入模块: from django.db.models import functions [as 别名]
# 或者: from django.db.models.functions import Length [as 别名]
def make_text_units_query(project_id):
    filters = dict(unit_type='paragraph', text_len__gt=99)
    if project_id:
        filters['document__project_id'] = project_id
    return TextUnit.objects.annotate(text_len=Length('textunittext__text')).filter(
        **filters).order_by('pk') 

# 需要导入模块: from django.db.models import functions [as 别名]
# 或者: from django.db.models.functions import Length [as 别名]
def _refresh_title_norms(self):
        """
        Refreshes the value of the title_norm field.

        This needs to be set to 'lavg/ld' where:
         - lavg is the average length of titles in all documents (also in terms)
         - ld is the length of the title field in this document (in terms)
        """

        lavg = self.entries.annotate(title_length=Length('title')).aggregate(Avg('title_length'))['title_length__avg']
        self.entries.annotate(title_length=Length('title')).filter(title_length__gt=0).update(title_norm=lavg / F('title_length')) 

# 需要导入模块: from django.db.models import functions [as 别名]
# 或者: from django.db.models.functions import Length [as 别名]
def get_sitewide_message(slug="welcome_message", lang=None):
        """
        Returns a sitewide message based on its slug and the specified language.
        If the language is not specified, it will use the current language.
        If there are no results found, it falls back on the global version.
        It doesn't exist at all, it returns None.
        :param slug: str
        :param lang: str|None
        :return: MarkupField|None
        """

        # Get default value if lang is not specified
        language = lang if lang else get_language()

        # Let's retrieve messages where slug is either:
        #   - "<slug>_<locale>"
        #   - "<slug>"
        # We order the results by the length of the slug to be sure
        # localized version comes first.
        sitewide_message = SitewideMessage.objects\
            .filter(
                Q(slug="{}_{}".format(slug, language)) |
                Q(slug="{}".format(slug)))\
            .order_by(Length("slug").desc())\
            .first()

        if sitewide_message is not None:
            return sitewide_message.body

        return None 

# 需要导入模块: from django.db.models import functions [as 别名]
# 或者: from django.db.models.functions import Length [as 别名]
def test_if_basic(self):
        Alphabet.objects.create(d="String")
        Alphabet.objects.create(d="")
        Alphabet.objects.create(d="String")
        Alphabet.objects.create(d="")

        results = list(
            Alphabet.objects.annotate(has_d=If(Length("d"), Value(True), Value(False)))
            .order_by("id")
            .values_list("has_d", flat=True)
        )
        assert results == [True, False, True, False] 

# 需要导入模块: from django.db.models import functions [as 别名]
# 或者: from django.db.models.functions import Length [as 别名]
def test_regex_substr_filter(self):
        Author.objects.create(name="Euripides")
        Author.objects.create(name="Frank Miller")
        Author.objects.create(name="Sophocles")
        qs = list(
            Author.objects.annotate(name_has_space=Length(RegexpSubstr("name", r"\s")))
            .filter(name_has_space=0)
            .order_by("id")
            .values_list("name", flat=True)
        )
        assert qs == ["Euripides", "Sophocles"] 

# 需要导入模块: from django.db.models import functions [as 别名]
# 或者: from django.db.models.functions import Length [as 别名]
def get_search_results(self, request, queryset, search_term):
        search_term = search_term.strip()
        if search_term:
            return queryset.filter(
                tag__startswith=search_term
            ).annotate(
                tag_length=Length('tag')
            ).order_by('tag_length'), False
        else:
            return queryset.none(), False 

# 需要导入模块: from django.db.models import functions [as 别名]
# 或者: from django.db.models.functions import Length [as 别名]
def migrate_history_lines(apps, schema_editor):
    HistoryLines = apps.get_registered_model('main', 'HistoryLines')
    qs = HistoryLines.objects.annotate(line_len=Length('line'))
    qs = qs.filter(line_len__gt=2048)
    lines = []
    for hist_line in qs:
        history = hist_line.history
        value = hist_line.line
        number = hist_line.line_number
        hist_line.delete()
        lines += [l for l in __bulking_lines(history, value, number, HistoryLines)]
    HistoryLines.objects.bulk_create(lines) 

# 需要导入模块: from django.db.models import functions [as 别名]
# 或者: from django.db.models.functions import Length [as 别名]
def test_basic(self):
        Author.objects.create(name='John', alias='xyz')
        tests = (
            (Repeat('name', 0), ''),
            (Repeat('name', 2), 'JohnJohn'),
            (Repeat('name', Length('alias'), output_field=CharField()), 'JohnJohnJohn'),
            (Repeat(Value('x'), 3, output_field=CharField()), 'xxx'),
        )
        for function, repeated_text in tests:
            with self.subTest(function=function):
                authors = Author.objects.annotate(repeated_text=function)
                self.assertQuerysetEqual(authors, [repeated_text], lambda a: a.repeated_text, ordered=False) 

# 需要导入模块: from django.db.models import functions [as 别名]
# 或者: from django.db.models.functions import Length [as 别名]
def test_combined_with_length(self):
        Author.objects.create(name='Rhonda', alias='john_smith')
        Author.objects.create(name='♥♣♠', alias='bytes')
        authors = Author.objects.annotate(filled=LPad('name', Length('alias'), output_field=CharField()))
        self.assertQuerysetEqual(
            authors.order_by('alias'),
            ['  ♥♣♠', '    Rhonda'],
            lambda a: a.filled,
        )