Django模板中的“查询和多个类别”模型下拉菜单过滤

问题描述

我希望下拉菜单中的过滤器可以从2个模型（类别[视频，照片]）和场合[婚礼，订婚，洗礼等）中获取查询，这是我的代码：

models.py

class Category(models.Model):

    class Meta:
        verbose_name_plural = "Categories"
    name = models.CharField(max_length=254)
    friendly_name = models.CharField(max_length=254,null=True,blank=True)

    def __str__(self):
        return self.name

    def get_friendly_name(self):
        return self.friendly_name     


class Occasion(models.Model):
    name = models.CharField(max_length=254)
    friendly_name = models.CharField(max_length=254,blank=True)

    def __str__(self):
        return self.name

    def get_friendly_name(self):
        return self.friendly_name    


class Package(models.Model):
    name = models.CharField(max_length=254)
    friendly_name = models.CharField(max_length=254,blank=True)

    def __str__(self):
        return self.name

    def get_friendly_name(self):
        return self.friendly_name


class Product(models.Model):
    category = models.ForeignKey('Category',blank=True,on_delete=models.SET_NULL)
    occasion = models.ForeignKey('Occasion',on_delete=models.SET_NULL)
    package = models.ForeignKey('Package',on_delete=models.SET_NULL)
    long_description = models.TextField()
    short_description = models.TextField()
    things_include = models.TextField()
    price = models.DecimalField(max_digits=6,decimal_places=2)
    rating = models.DecimalField(max_digits=6,decimal_places=2,blank=True)
    image_url = models.URLField(max_length=1024,blank=True)
    image = models.ImageField(null=True,blank=True)

    def __str__(self):
        return self.category.name + " - " + self.occasion.name

    def thingsInclude_as_list(self):
        return self.things_include.split(',')

    def get_name_categoryOccasion(self):
        return self.category.name + " " + self.occasion.name

views.py 在这里，我可以从数据库中查询所有模型

def all_products(request):
    """ A view to show all products,including sorting and search queries """

    products = Product.objects.all()
    query = None
    categories = None
    occasions = None
    if request.GET:
        if 'category' in request.GET:
            categories = request.GET['category'].split(",")
            products = products.filter(category__name__in=categories)
            categories = Category.objects.filter(name__in=categories)
        elif 'occasion' in request.GET:
            occasions = request.GET['occasion'].split(",")
            products = products.filter(occasion__name__in=occasions)
            occasions = Occasion.objects.filter(name__in=occasions)
        if 'q' in request.GET:
            query = request.GET['q']
            if not query:
                messages.error(request,"You didn't enter any search criteria!")
                return redirect(reverse('products'))

            queries = Q(category__friendly_name__icontains=query) | Q(long_description__icontains=query) | Q(things_include__icontains=query) | Q(package__friendly_name__icontains=query) | Q(occasion__friendly_name__icontains=query)
            products = products.filter(queries)

    context = {
        "products": products,"search_term": query,"current_categories": categories,"current_occasions": occasions,}
    return render(request,"products/products.html",context)

模板 您可以在图片中看到我如何在html模板中使用过滤 enter image description here

解决方法

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