Question

写我的第一个＆＃34;真实＆＃34; django项目我意识到我的观点非常巨大。我尝试将其转换为CBV（作为额外的django训练）。以下是我的fbv观点：

def index(request):
    context = {}
    categories = Category.objects.select_related()
    subcategories = SubCategory.objects.all()
    context['categories'] = categories
    context['subcategories'] = subcategories
    return render(request, 'mainapp/index.html', context)


def category(request, category_name_slug):
    context = {}
    try:
        category = Category.objects.get(slug=category_name_slug)
        subcategory = SubCategory.objects.filter(category=category)
        context['subcategories'] = subcategory
        context['category'] = category
    except Category.DoesNotExist:
        raise Http404("Category doesn't exist")
    return render(request, 'mainapp/category.html', context)


def subcategory(request, category_name_slug, subcategory_name_slug):

    context = {}
    form = SiteAddForm(initial={'url': 'http://'})
    context['form'] = form
    try:
        category = Category.objects.get(slug=category_name_slug)
        subcategory = SubCategory.objects.filter(category=category
                                                 ).get(slug=subcategory_name_slug)
        sites = Site.objects.filter(subcategory=subcategory, is_active=True)
        context['subcategory'] = subcategory
        context['category'] = category
        context['sites'] = sites
    except (SubCategory.DoesNotExist, Category.DoesNotExist):
        raise Http404("Nie ma takiej strony")
    if request.method == 'POST':
        form = SiteAddForm(request.POST)
        if form.is_valid():
            siteurl = form.cleaned_data['url']
            context['siteurl'] = siteurl
            try:
                page = AddNewSite(siteurl)
            except:
                print('ERRROR')
                context['Error'] = "URL is not responding"
                return render(request, 'mainapp/subcategory.html', context)
            title = page.title()
            description = page.description()
            keywords = page.keywords()
            if page.check_url_in_database():
                context['Error'] = "Site already in database"
                return render(request, 'mainapp/subcategory.html', context)
            else:
                form_extended = SiteAddFormFull(initial={'url': siteurl, 'name':
                                                     title, 'description':
                                                     description, 'keywords':
                                                     keywords})
            context['form_extended'] = form_extended
            if request.method == 'POST':
                form_extended = SiteAddFormFull(request.POST)
                if form_extended.is_valid():
                    keywords = form_extended.cleaned_data['keywords']
                    name = form_extended.cleaned_data['name']
                    description = form_extended.cleaned_data['description']
                    page.add_site(category, subcategory, keywords,
                                  description, name, siteurl)
                    context['added_site'] = 'Thank you - site was added'
                    messages.add_message(request, messages.SUCCESS, 'Dodano!!')

return render(request, 'mainapp/subcategory.html', context)

如何使用CBV简化编写基本视图（索引）。看起来应该是这样的：类别： SUB1 分公司2 类别2： Sub2a Sub2b

我应该学习CBV还是继续使用FBV（它有效）？以下是我的类别，子类别模型：

class Category(models.Model):
    name = models.CharField(max_length=30, unique=True,
                        verbose_name='Category name')
    slug = models.SlugField()
    image = models.ImageField(upload_to='category_images',
                          verbose_name="Category image",
                          blank=True)
    description = models.TextField(default='Description',
                               verbose_name="Category description")

    class Meta:
        verbose_name_plural = "Categories"

    def save(self, *args, **kwargs):
        self.slug = slugify(self.name)
        super(Category, self).save(*args, **kwargs)

    def image_thumb(self):
        if self.image:
            return '<img src="/media/%s" width="40" height="40" />' % (self.image)
        else:
            return('')
    image_thumb.short_description = 'Thumb'
    image_thumb.allow_tags = True

    def __str__(self):
        return self.name


class SubCategory(models.Model):
    category = models.ForeignKey(
        'Category',
        related_name='subcategory',
        on_delete=models.CASCADE,
        blank=True,
        null=True,
)
    name = models.CharField(max_length=30)
    slug = models.SlugField()

    def save(self, *args, **kwargs):
        self.slug = slugify(self.name)
        super(SubCategory, self).save(*args, **kwargs)

    class Meta:
        verbose_name_plural = "Subcategories"

    def __str__(self):
        return self.name

Answer 1

我是CBV的拥护者，在尝试重用代码时，它可以让生活变得更轻松。还有大量预定义的通用视图，大多数情况下只需要进行小的调整。对于您的示例索引，您可以使用TemplateView：

class IndexView(TemplateView):
    template_name = "mainapp/index.html"

    def get_context_data(self, **kwargs):
        context = super(IndexView, self).get_context_data(**kwargs)
        context['categories'] = Category.objects.select_related()
        context['subcategories'] = SubCategory.objects.all()
        return context

Django CBV - 将FBV改为CBV

1 个答案: