小编Anu*_*TBE的帖子

我有一个valid_till类型的属性DATE.

现在我想要做的是valid_till从今天开始比较.

$couponCheck = $this->Coupons->find('all', [
    'conditions' => [
       'coupon_code' => $couponCode
     ]
   ]);
   if ($couponCheck->count() === 1) {
     $coupon = $couponCheck->first();
     if ($coupon->valid_till >= isToday()) {
        echo 'Coupon is Valid';
     } else {
        echo 'Coupon is Expired';
     }
   } else {
      echo 'This is not a valid coupon code';
   }

但这不起作用.我怎么能这样做？

我已经使用pipenv内部/home/user/code/project目录设置了一个 python 项目。

我已设置PyCharm为该项目使用本地解释器

但是当我pipenv在其中运行命令时PyCharm's console会出现错误

$ pipenv
zsh: command not found: pipenv

如何设置PyCharm使用pipenv项目中设置的环境？

我有一个应用程序notes和模型名称定义为

笔记/模型.py

from shorturls.models import ShortUrl

class Note(models.Model):
   # columns here

   def __str___(self):
       return self.title

@receiver(post_save, sender=Note)
def post_save_note_receiver(sender, instance, created, *args, **kwargs):
    if instance and created:
        ShortUrl.objects.create(note=instance)

和另一个应用程序shorturls来存储带有模型的每条记录的短 URL

短网址/models.py

from notes.models import Note

class ShortUrl(models.Model):
    note = models.OneToOneField(Note, on_delete=models.CASCADE, blank=True)
    short_key = models.CharField()

    def __str__(self):
        return self.short_key

@receiver(pre_save, sender=ShortUrl)
def pre_save_short_url_receiver(sender, instance, *args, **kwargs):
    instance.short_key = unique_short_key_generator(instance)

但是python manage.py makemigrations，它给出的错误为

File "path_to_app/shorturls/models.py", line 7, in <module>
    from notes.models import Note
ImportError: cannot …

我正在使用Django 2.0并一直试图将用户重定向到其他视图get_context_data

我的网址模式是

mainapp.urls

urlpatterns = [
    path('learn/', include('learn.urls', namespace='learn')),
    path('admin/', admin.site.urls),
]

应用程序网址

app_name = 'learn'
urlpatterns = [
    path('success/<course_learn_id>/<session>', LearnSuccess.as_view(), name='success'),
]

并LearnSuccess查看

class LearnQuestion(FormView):
    form_class = SessionForm
    template_name = 'learn/learn_question.html'

    def get_context_data(self, **kwargs):
        context = super(LearnQuestion, self).get_context_data(**kwargs)
        course_learn = CourseLearn.objects.get(pk=self.kwargs['course_learn_id'])

        session = self.request.GET['session']
        question, question_type, options, complete = CourseLearn.objects.get_next_question(course_learn, session)

        if complete:
            return redirect('learn:success', course_learn_id=course_learn.pk, session=session)

        context['complete'] = complete
        context['question'] = question
        context['question_type'] = context_type
        context['options'] = options
        context['session'] = session

        return …

我正在使用Django 2.0,Django REST Framework和Django Filters来过滤查询集。

我已经安装django-filters并添加到INSTALLED_APPSas django_filters。

设置文件有

REST_FRAMEWORK = {
    'DEFAULT_AUTHENTICATION_CLASSES': (
        'oauth2_provider.contrib.rest_framework.OAuth2Authentication'
    ),
    'DEFAULT_PERMISSION_CLASSES': [
        'rest_framework.permissions.IsAuthenticated'
    ],
    'DEFAULT_PAGINATION_CLASS': 'rest_framework.pagination.PageNumberPagination',
    'PAGE_SIZE': 10,
    'DEFAULT_FILTER_BACKENDS': ('django_filters.rest_framework.DjangoFilterBackend',)
}

视图类就像

class AmountGivenViewSet(viewsets.ModelViewSet):
    serializer_class = AmountGivenSerializer
    permission_classes = (IsAuthenticated,)
    filterset_fields = ('contact__id',)

    def get_queryset(self):
        queryset = AmountGiven.objects.filter(
            contact__user=self.request.user
        )
        query = self.request.query_params.get('q', None)

        if query:
            queryset = queryset.filter(
                Q(transaction_number=query) |
                Q(comment__contains=query) |
                Q(amountreturned__transaction_number=query) |
                Q(amountreturned__comment__contains=query)
            )

        return queryset

AmountGiven模型有一个联系的外键，因此想要根据contact_id进行过滤。 …

我正在使用 Anuglar 6

我有两个组件account和profile. account组件被添加到app-component。

我想通过单击account-component中的按钮打开profile -component。

但这给了我一个错误

Error: No component factory found for NgbModalBackdrop. Did you add it to @NgModule.entryComponents?

该应用程序模块的样子

@NgModule({
  imports:      [ BrowserModule, FormsModule ],
  declarations: [ AppComponent, HelloComponent, AccountComponent, ProfileComponent ],
  entryComponents: [
    ProfileComponent
  ],
  bootstrap:    [ AppComponent ]
})
export class AppModule { }

这是工作示例：https : //stackblitz.com/edit/angular-uwobqm

我有一个python列表

[{'month': 8, 'total': 31600.0}, {'month': 9, 'total': 2000.0}]

并希望像它一样生成它

[
  {'month': 1, 'total': 0},
  {'month': 2, 'total': 0},
  ...
  {'month': 8, 'total': 31600},
  {'month': 9, 'total': 2000},
  ...
  {'month': 12, 'total': 0}
]

为此,我正在对范围进行迭代 (1,13)

new_list = []
for i in range(1, 13):
  # if i exists in month, append to new_list
  # else add total: 0 and append to new_list

我如何检查是否我的存在一个月,并得到字典？

我正在使用Django 2.2.x和DRF。

我有一个带有FileField的模型

file = models.FileField(upload_to=get_media_upload_path)

http://example.com/media/image.jpg

https://example.com/media/image.png

MEDIA_URL = '/media_/'
MEDIA_ROOT = os.path.join(os.path.dirname(BASE_DIR), 'static_cdn', 'media_root')