Python models.When方法代码示例

# 需要导入模块: from django.db import models [as 别名]
# 或者: from django.db.models import When [as 别名]
def get_queryset(self):
        try:
            validity_period = SiteConfiguration.get_solo().confirmation_validity_period
        except DatabaseError:
            from datetime import timedelta
            validity_period = timedelta(weeks=42)
        validity_start = timezone.now() - validity_period
        return super().get_queryset().annotate(deleted=Case(
            When(deleted_on__isnull=True, then=False),
            default=True,
            output_field=BooleanField()
        )).annotate(confirmed=Case(
            When(confirmed_on__isnull=True, then=False),
            When(confirmed_on__lt=validity_start, then=False),
            default=True,
            output_field=BooleanField()
        )).annotate(checked=Case(
            When(checked_on__isnull=True, then=False),
            # When(checked_on__lt=validity_start, then=False),  # Temporarily disabled.
            default=True,
            output_field=BooleanField()
        )).select_related() 

# 需要导入模块: from django.db import models [as 别名]
# 或者: from django.db.models import When [as 别名]
def fix_index(request):
    suggestion_list = Suggestion.objects.select_related('work', 'user').prefetch_related(
        'work__category', 'evidence_set__user').annotate(
            count_agrees=Count(Case(When(evidence__agrees=True, then=1))),
            count_disagrees=Count(Case(When(evidence__agrees=False, then=1)))
        ).all().order_by('is_checked', '-date')

    paginator = Paginator(suggestion_list, FIXES_PER_PAGE)
    page = request.GET.get('page')

    try:
        suggestions = paginator.page(page)
    except PageNotAnInteger:
        suggestions = paginator.page(1)
    except EmptyPage:
        suggestions = paginator.page(paginator.num_pages)

    context = {
        'suggestions': suggestions
    }

    return render(request, 'fix/fix_index.html', context) 

# 需要导入模块: from django.db import models [as 别名]
# 或者: from django.db.models import When [as 别名]
def with_balances(self):
        qs = self.annotate(
            balances_debit=models.Sum(
                models.Case(
                    models.When(
                        ~models.Q(bookings__debit_account=None), then="bookings__amount"
                    ),
                    default=0,
                    output_field=models.DecimalField(max_digits=8, decimal_places=2),
                )
            ),
            balances_credit=models.Sum(
                models.Case(
                    models.When(
                        ~models.Q(bookings__credit_account=None),
                        then="bookings__amount",
                    ),
                    default=0,
                    output_field=models.DecimalField(max_digits=8, decimal_places=2),
                )
            ),
        )
        return qs 

# 需要导入模块: from django.db import models [as 别名]
# 或者: from django.db.models import When [as 别名]
def with_transaction_balances(self):
        qs = self.annotate(
            transaction_balances_debit=models.Sum(
                models.Case(
                    models.When(
                        ~models.Q(transaction__bookings__debit_account=None),
                        then="transaction__bookings__amount",
                    ),
                    default=0,
                    output_field=models.DecimalField(max_digits=8, decimal_places=2),
                )
            ),
            transaction_balances_credit=models.Sum(
                models.Case(
                    models.When(
                        ~models.Q(transaction__bookings__credit_account=None),
                        then="transaction__bookings__amount",
                    ),
                    default=0,
                    output_field=models.DecimalField(max_digits=8, decimal_places=2),
                )
            ),
        )
        return qs 

# 需要导入模块: from django.db import models [as 别名]
# 或者: from django.db.models import When [as 别名]
def make_contest_ranking_profile(contest, participation, contest_problems):
    def display_user_problem(contest_problem):
        # When the contest format is changed, `format_data` might be invalid.
        # This will cause `display_user_problem` to error, so we display '???' instead.
        try:
            return contest.format.display_user_problem(participation, contest_problem)
        except (KeyError, TypeError, ValueError):
            return mark_safe('<td>???</td>')

    user = participation.user
    return ContestRankingProfile(
        id=user.id,
        user=user.user,
        css_class=user.css_class,
        username=user.username,
        points=participation.score,
        cumtime=participation.cumtime,
        tiebreaker=participation.tiebreaker,
        organization=user.organization,
        participation_rating=participation.rating.rating if hasattr(participation, 'rating') else None,
        problem_cells=[display_user_problem(contest_problem) for contest_problem in contest_problems],
        result_cell=contest.format.display_participation_result(participation),
        participation=participation,
    ) 

# 需要导入模块: from django.db import models [as 别名]
# 或者: from django.db.models import When [as 别名]
def validate_email(self):
        """Ensure emails are unique across the models tracking emails.

        Since it's essential to keep email addresses unique to support our
        workflows, a `ValidationError` will be raised if the email trying
        to be saved is already assigned to some other user.
        """
        lookup = Q(email__iexact=self.email)
        if self.pk is not None:
            # When there's an update, ensure no one else has this address
            lookup &= ~Q(user=self)

        try:
            EmailAddress.objects.get(lookup)
        except EmailAddress.DoesNotExist:
            pass
        else:
            raise ValidationError({"email": [_("This email address already exists.")]}) 

# 需要导入模块: from django.db import models [as 别名]
# 或者: from django.db.models import When [as 别名]
def pre_filter(self, queryset, user):
        ''' Returns all of the items from queryset where the date falls into
        any specified range, but not yet where the stock limit is not yet
        reached.'''

        now = timezone.now()

        # Keep items with no start time, or start time not yet met.
        queryset = queryset.filter(Q(start_time=None) | Q(start_time__lte=now))
        queryset = queryset.filter(Q(end_time=None) | Q(end_time__gte=now))

        # Filter out items that have been reserved beyond the limits
        quantity_or_zero = self._calculate_quantities(user)

        remainder = Case(
            When(limit=None, then=Value(_BIG_QUANTITY)),
            default=F("limit") - Sum(quantity_or_zero),
        )

        queryset = queryset.annotate(remainder=remainder)
        queryset = queryset.filter(remainder__gt=0)

        return queryset 

# 需要导入模块: from django.db import models [as 别名]
# 或者: from django.db.models import When [as 别名]
def get_queryset(self):
        today = timezone.localdate()
        return super() \
            .get_queryset() \
            .annotate(attendees_count=models.Count('attendee', distinct=True)) \
            .annotate(last_date=models.Max('eventdate__date')) \
            .annotate(activity_proposal_is_open=models.Case(
                models.When(models.Q(limit_proposal_date__gte=today), then=True),
                default=False,
                output_field=models.BooleanField()
            )) \
            .annotate(registration_is_open=models.Case(
                models.When(models.Q(last_date__gte=today), then=True),
                default=False,
                output_field=models.BooleanField()
            )) 

# 需要导入模块: from django.db import models [as 别名]
# 或者: from django.db.models import When [as 别名]
def query_search(  # pylint: disable=too-many-arguments
        request, min_length, queryset, fields, collection, order_relevance=False):
    """Returns queryset with search filter."""
    search = request.GET.get('query')
    if search is not None and len(search) >= min_length:
        # Use a FTS backend if we have one
        if settings.USE_SONIC:
            ids = run_query_sync(collection, search)
            queryset = queryset.filter(id__in=ids)

            # Preserve order of returned results
            if order_relevance:
                preserved = Case(*[When(pk=pk, then=pos) for pos, pk in enumerate(ids)])
                queryset = queryset.order_by(preserved)

            return queryset

        # Fallback if we are so quiet ;)
        return query_search_fallback(queryset, fields, search)  # pragma: no cover

    return queryset 

# 需要导入模块: from django.db import models [as 别名]
# 或者: from django.db.models import When [as 别名]
def children(self):
        user_ordering = self.SITES_ORDERING[self.sites_ordering]['ordering']
        pages = WagtailSitePage.objects.live().filter(Q(path__startswith=self.path) | Q(in_cooperation_with=self))

        # When ordering by `path`, the collaborations would either all be listed first or last
        # depending on whether the collaborator(s) page(s) was created before or after this page.
        # Adding an overwrite here so collaborations always appear last.
        if self.sites_ordering == self.SITES_ORDERING_PATH:
            pages = pages.annotate(
                is_own=Case(
                    When(path__startswith=self.path, then=Value(True)),
                    default_value=Value(False),
                    output_field=models.BooleanField(),
                )
            ).order_by('is_own', *user_ordering)

        # When ordering alphabetically or by creation date,
        # own sites and collaboration sites will be sorted together.
        else:
            pages = pages.order_by(*user_ordering)

        return pages 

# 需要导入模块: from django.db import models [as 别名]
# 或者: from django.db.models import When [as 别名]
def get_context_data(self, **kwargs):
        p = Proposal.objects.aggregate(
            proposals=Count('pk'),
            proposal_elab=Count(
                Case(When(status='elab', then=1), output_field=IntegerField())),
            proposal_pending=Count(
                Case(When(status='p', then=1), output_field=IntegerField())),
            proposal_concluded=Count(
                Case(When(status='co', then=1), output_field=IntegerField())),
            proposal_approved=Count(
                Case(When(status='a', then=1), output_field=IntegerField())),
            proposal_canceled=Count(
                Case(When(status='c', then=1), output_field=IntegerField())),
        )
        context = super(Dashboard, self).get_context_data(**kwargs)
        context['proposals'] = p
        context['proposal_list'] = self.proposal_list()
        context['proposal_elab'] = self.proposal_elab()
        context['entrys'] = self.entry_list()
        context['contract_total_per_month'] = self.contract_total_per_month()
        context['contract_total_per_year'] = self.contract_total_per_year()

        return context 

# 需要导入模块: from django.db import models [as 别名]
# 或者: from django.db.models import When [as 别名]
def get_queryset(self):
        if not (hasattr(self, '_queryset') and self._queryset):
            base_queryset = super(ContactListView, self).get_queryset()
            if self.request.GET.get('q'):
                search_contacts = self.get_search_contacts()
                preserved = Case(*[When(pk=pk, then=pos) for pos, pk in enumerate(search_contacts)])
                base_queryset = base_queryset.filter(
                    id__in=search_contacts
                ).order_by(preserved)
            self._queryset = base_queryset.annotate(has_last_contact=Count('last_contact'))
            sort = self.request.GET.get('s')
            if sort == 'oldnew':
                self._queryset = self._queryset.order_by('-has_last_contact','last_contact')
            if sort == 'newold':
                self._queryset = self._queryset.order_by('-has_last_contact','-last_contact')
            if sort == 'za':
                self._queryset = self._queryset.order_by('-name')
            if sort == 'az':
                self._queryset = self._queryset.order_by('name')
            if not self.request.GET.get('q') and not sort:
                self._queryset = self._queryset.order_by('-has_last_contact','-last_contact')
            self._queryset = self._queryset.prefetch_related('tags')
        return self._queryset 

# 需要导入模块: from django.db import models [as 别名]
# 或者: from django.db.models import When [as 别名]
def viral_video_detail(request, pk):
    yesterday = now() - timedelta(days=1)

    qs = ViralVideo.objects.annotate(
        total_views=models.F("authenticated_views") + models.F("anonymous_views"),
        label=models.Case(
            models.When(total_views__gt=POPULAR_FROM, then=models.Value("popular")),
            models.When(created__gt=yesterday, then=models.Value("new")),
            default=models.Value("cool"),
            output_field=models.CharField(),
        ),
    )

    # DEBUG: check the SQL query that Django ORM generates
    logger.debug(f"Query: {qs.query}")

    qs = qs.filter(pk=pk)
    if request.user.is_authenticated:
        qs.update(authenticated_views=models.F("authenticated_views") + 1)
    else:
        qs.update(anonymous_views=models.F("anonymous_views") + 1)

    video = get_object_or_404(qs)

    return render(request, "viral_videos/viral_video_detail.html", {"video": video}) 

# 需要导入模块: from django.db import models [as 别名]
# 或者: from django.db.models import When [as 别名]
def get_aggregate_engagement_data(self, course_id):
        seven_days_ago = now() - datetime.timedelta(days=7)
        dict_list = [
            ('videos_overall', When(entity_type='video', then='count')),
            ('videos_last_week', When(entity_type='video', created__gt=seven_days_ago, then=1)),
            ('problems_overall', When(entity_type='problem', then='count')),
            ('problems_last_week', When(entity_type='problem', created__gt=seven_days_ago, then='count')),
            ('correct_problems_overall', When(entity_type='problem', event='completed', then='count')),
            ('correct_problems_last_week', When(entity_type='problem', event='completed',
                                                created__gt=seven_days_ago, then='count')),
            ('problems_attempts_overall', When(entity_type='problem', event='attempted', then='count')),
            ('problems_attempts_last_week', When(entity_type='problem', event='attempted',
                                                 created__gt=seven_days_ago, then='count')),
            ('forum_posts_overall', When(entity_type='discussion', then='count')),
            ('forum_posts_last_week', When(entity_type='discussion', created__gt=seven_days_ago, then='count')),
        ]
        dict_parameters = {key: Sum(Case(val, output_field=IntegerField())) for key, val in dict_list}
        dict_parameters['date_last_active'] = Max('created')
        query = ModuleEngagement.objects.filter(course_id=course_id)\
            .values('username')\
            .annotate(**dict_parameters)
        return query 

# 需要导入模块: from django.db import models [as 别名]
# 或者: from django.db.models import When [as 别名]
def package_list(request, template_name="package/package_grid.html"):
    context = {
        'categories': [
            {
                "title_plural": category.title_plural,
                "count": category.project_count,
                "description": category.description,
                "packages": category.project_set.published().order_by("-repo_watchers", "name")
            }
            for category in Category.objects.annotate(
                project_count=Count(Case(When(project__is_published=True, then=1)))
            )
        ]
    }

    return render(request, template_name, context)