title: Django _set.all() filter in QuerySet
body: <p>I have database and I want to extract specific data of specific user from queryset. Now i have this</p>
  <p><strong>VIEW</strong></p>
  <pre><code>def index(request):
      customerByName = Customer.objects.get(name='pablo')
      shopListById = ShopList.objects.get(transaction_id=1)
      shpoListSpecific = customerByName.shoplist_set.all()
      specificProducts = shopListById.shoplistproduct_set.all()
  
      context = {'customerByName':customerByName, 'shpoListSpecific':shpoListSpecific, 'shopListById':shopListById,
       'specificProducts': specificProducts}
      return render(request, 'QuickShopperApp/home.html', context)
  </code></pre>
  <p><strong>MODELS</strong></p>
  <pre><code>class Customer(models.Model):
      user = models.OneToOneField(User, null=True, blank=True, on_delete=models.CASCADE)
      name = models.CharField(max_length=200, null=True, blank=True)
      email = models.CharField(max_length=200, null=True, blank=True)
      device = models.CharField(max_length=200, null=True, blank=True)
  
      def __str__(self):
          if self.name:
              name = self.name
          else:
              name = self.device
          return str(name)
  
  class Product(models.Model):
      name = models.CharField(max_length=200, null=True)
  
      def __str__(self):
          return self.name
  
  
  class ShopList(models.Model): # cart
      customer = models.ForeignKey(Customer, on_delete=models.SET_NULL, null=True, blank=True)
      #product = models.ForeignKey(Product, on_delete=models.SET_NULL, null=True)
      date_ordered = models.DateTimeField(auto_now_add=True)
      complete = models.BooleanField(default=False)
      transaction_id = models.CharField(max_length=100, null=True)
  
      def __str__(self):
          return str(self.id)
  
  class ShopListProduct(models.Model): # each ShopList will have multiple ShopListProduct
      product = models.ForeignKey(Product, on_delete=models.SET_NULL, null=True)
      shopList = models.ForeignKey(ShopList, on_delete=models.SET_NULL, null=True) #shoplistitem.shoplist
      quantity = models.IntegerField(default=0, null=True, blank=True)
      date_added = models.DateTimeField(auto_now_add=True)
  
      def __str__(self):
          return str(self.product)
  </code></pre>
  <p><strong>template.html</strong></p>
  <pre><code>&lt;h3&gt;specificProducts: {{specificProducts}}&lt;/h3&gt;
  </code></pre>
  <p>On my side i see items of specific customer.</p>
  <p><strong>specificProducts: &lt;QuerySet [&lt;ShopListProduct: Apple&gt;, &lt;ShopListProduct: Cucumber&gt;, &lt;ShopListProduct: Cucumber&gt;]&gt;</strong></p>
  <p>How can i get only Apple, Cucumber, Cucumber?</p>