Question

我一直在做这个项目我想按类别ID名称过滤all_products，但是当我这样做时，它给了我错误形成的十六进制UUID字符串错误。这是models.py

from django.db import models
import uuid
# Create your models here.
class Category(models.Model):
    category = models.CharField(max_length=100)
    id = models.UUIDField(primary_key=True, default=uuid.uuid4, editable=False)
    created_at = models.DateTimeField(auto_now_add=True)
    updated_at = models.DateTimeField(auto_now=True)

    def __str__(self):
        return self.category

class Product(models.Model):
    title = models.CharField(max_length=100)
    id = models.UUIDField(primary_key=True, default=uuid.uuid4, editable=False)
    image = models.FileField(default=None)
    desc = models.TextField(default="Random")
    price = models.DecimalField(max_digits=10, decimal_places=2)
    vnos = models.CharField(max_length=30)
    quantity = models.BigIntegerField()
    category = models.ForeignKey(Category, on_delete=models.CASCADE)
    created_at = models.DateTimeField(auto_now_add=True)
    updated_at = models.DateTimeField(auto_now=True)
    times_bought = models.BigIntegerField(default=0)

    def __str__(self):
        return self.title

和views.py

def category_detail(request, category_id):
    try:
        current_category = Category.objects.get(pk=category_id)
    except Product.DoesNotExist:
        raise Http404("Album does not exist.")
    current_category_name = current_category.category
    template = loader.get_template('categories/details.html')
    all_products = Product.objects.all()
    products_by_category = Product.objects.all().filter(category=str(current_category_name))
    footer = loader.get_template('main/footer.html')
    head = loader. get_template('main/head.html')
    nav = loader.get_template('main/nav.html')
    all_categories = Category.objects.all()

    paginator = Paginator(all_products, 6)

    page = request.GET.get('page')
    try:
        all_products = paginator.page(page)
    except PageNotAnInteger:
        all_products = paginator.page(1)
    except EmptyPage:
        all_products = paginator.page(paginator.num_pages)

    context = {
        'all_products': all_products,
        'all_categories': all_categories,
        'footer': footer,
        'head': head,
        'nav': nav,
        'products_by_category': products_by_category
    }

    return HttpResponse(template.render(context, request))

我尝试了不同的方法，但没有什么真正有用。我想点击某个链接时按类别名称过滤产品。

当我试图激怒变量时会引发错误。

{% for product in products_by_category %}

如果我不在products_by_category上使用过滤器，它运行正常。

Answer 1

按类别过滤Product模型时，应使用类别实例，而不是类别名称。

products_by_category = Product.objects.filter(category=current_category)

请注意，您不需要在all()之前致电filter()。

Django fixture中形成错误的十六进制uuid字符串错误

1 个答案: