无法获取每个类别的特定产品

Question

我总是得到所有类别的所有食品。 我想显示每个 Category 和每个 food 项目。 需要显示具有属于该类别的项目的类别。 请有人帮我解决这个问题。我已经尝试在互联网上查找，但找不到解决方案

models.py

class Category(models.Model):
       category_name = models.CharField(max_length=50)
 
       def __str__(self):
        return self.category_name


class Menu(models.Model):

    dish_name = models.CharField(max_length=200, verbose_name='Name of Dish')
    Desc = models.TextField(verbose_name='Dish Description')
    Amount = models.IntegerField(null=False, blank=False, verbose_name='Amount of Dish')
    date_posted = models.DateTimeField(default=timezone.now, verbose_name='Dish Date Posted')
    category = models.ForeignKey(Category, on_delete=models.CASCADE, default=1)

    def __str__(self):
        return self.dish_name

views.py

def menu(request):

    products = Menu.objects.all()

    categories = Category.objects.all()

    data = {}
    data['products'] = products
    data['categories'] = categories
    template = 'food/menu.html'
    return render(request, template, data)

html

{% for category in categories %}

    {% if categories %}

        <div class="col-xs-12 col-sm-6">
          <div class="menu-section">
            <h2 class="menu-section-title">{{ category.category_name }}</h2>
            <hr>
            {% endif %}

              {% for i in products %}
              <div class="menu-item">
                <div class="menu-item-name">{{ i.dish_name}}</div>
                <div class="menu-item-price">Rs {{ i.Amount}}</div>
                <div class="menu-item-description">{{ i.Desc}}</div>
              </div>
              {% endfor %}
          </div>
        </div>
{% endfor %}

Answer 1

您没有根据类别过滤产品。

我建议用数据做这样的事情：

data = {
    'categories': {
        category: Menu.objects.filter(category=category) for category in categories
        }
    }

在 html 中你可以：

{% for category, products in categories.items %}
    {% if products %}

    <div class="col-xs-12 col-sm-6">
      <div class="menu-section">
        <h2 class="menu-section-title">{{ category.category_name }}</h2>
        <hr>

          {% for i in products %}
          <div class="menu-item">
            <div class="menu-item-name">{{ i.dish_name}}</div>
            <div class="menu-item-price">Rs {{ i.Amount}}</div>
            <div class="menu-item-description">{{ i.Desc}}</div>
          </div>
          {% endfor %}

      </div>
    </div>

    {% endif %}
{% endfor %}