Как я могу показать количество предметов? - PullRequest
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Как я могу показать количество предметов?

0 голосов
/ 18 июня 2020

Я пытаюсь показать общее количество контактов из этой модели .py 

import arrow
from django.db import models

from autoslug import AutoSlugField
from model_utils.models import TimeStampedModel
from django_countries.fields import CountryField
from phonenumber_field.modelfields import PhoneNumberField
from django.urls import reverse
from django.conf import settings


class Contact(TimeStampedModel):

    name = models.CharField("Name of Contact", max_length=255)
    first_name = models.CharField("First name", max_length=255, null=True)
    last_name = models.CharField("Last name", max_length=255, null=True)

    email = models.EmailField(unique=True, null=True)
    phone = PhoneNumberField(null=True, unique=True)

    slug = AutoSlugField("Contact Address",
                         unique=True,
                         always_update=False,
                         populate_from="name")

    description = models.TextField("Description", blank=True)

    class Firmness(models.TextChoices):
        UNSPECIFIED = "unspecified", "Unspecified"
        SOFT = "soft", "Soft"
        SEMI_SOFT = "semi-soft", "Semi-Soft"
        SEMI_HARD = "semi-hard", "Semi-Hard"
        HARD = "hard", "Hard"
        # Other Fields Here...

    firmness = models.CharField("Firmness", max_length=20, choices=Firmness.choices, default=Firmness.UNSPECIFIED)
    country_of_origin = CountryField("Country of Origin", blank=True)
    creator = models.ForeignKey(settings.AUTH_USER_MODEL, null=True, on_delete=models.SET_NULL)

    created_on = models.DateTimeField("Created on", auto_now_add=True, null=True)
    is_active = models.BooleanField(default=False)

    def __str__(self):
        return self.name

    def get_absolute_url(self):
        """"Return absolute URL to the Contact Detail page."""
        return reverse('contacts:detail', kwargs={"slug": self.slug})

    @property
    def created_on_arrow(self):
        return arrow.get(self.created_on).humanize()

    class Meta:
        ordering = ["-created_on"]

И у меня есть view.py 

from django.shortcuts import render
from .models import Contact
from django.contrib.auth.mixins import LoginRequiredMixin
from django.views.generic import (
    ListView,
    DetailView,
    CreateView,
    UpdateView
)


class ContactListView(ListView):
    model = Contact


class ContactDetailView(DetailView):
    model = Contact

    def total(request):
        total_contacts = Contact.objects.all()
        show_total_contacts = total_contacts.objects.count()
        return render(
            request, 'pages/home.html',
            {'total_contacts': total_contacts,
             'show_total_contacts': show_total_contacts}
        )


class ContactCreateView(LoginRequiredMixin, CreateView):
    model = Contact
    fields = [
        'name',
        'description',
        'firmness',
        'country_of_origin',
        'first_name',
        'last_name',
        'email',
        'phone',
        'is_active'
    ]

    def form_valid(self, form):
        form.instance.creator = self.request.user
        return super().form_valid(form)


class ContactUpdateView(LoginRequiredMixin, UpdateView):
    model = Contact
    fields = [
        'name',
        'description',
        'firmness',
        'country_of_origin',
        'first_name',
        'last_name',
        'email',
        'phone',
        'is_active'
    ]
    action = "Update"

, и это мой urls.py 

# everycheese/cheeses/urls.py
from django.urls import path
from . import views
from django.conf.urls.static import static
from django.conf import settings

app_name = "contacts"
urlpatterns = [

    # URL Pattern for the ContactListView
    path(
        route='',
        view=views.ContactListView.as_view(),
        name='list'
    ),

    # URL Pattern for the ContactCreateView
    path(
        route='add/',
        view=views.ContactCreateView.as_view(),
        name='add'
    ),

    # URL Pattern for the ContactUpdateView
    path(
        route='<slug:slug>/update/',
        view=views.ContactUpdateView.as_view(),
        name='update'
    ),

    # URL Pattern for the ContactDetailView
    path(
        route='<slug:slug>/',
        view=views.ContactDetailView.as_view(),
        name='detail'
    ),

]
urlpatterns += static(settings.MEDIA_URL, document_root=settings.MEDIA_ROOT)

Я только что закончил Two S coop Django 3 Cra sh Учебник. И я многому оттуда научился, но на самом деле он не вдавался в подробности о том, как обрабатывать такие вещи, как функции подсчета или более продвинутые вещи, такие как django rest framework.

Спасибо, что нашли время мне помочь ...

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