title: Django get related objects ManyToMany relationships
body: <p>I have two models:</p>
  <pre class="lang-py prettyprint-override"><code>class CartToys(models.Model):
      name = models.CharField(max_length=350)
      quantity = models.IntegerField()
          
  class Cart(models.Model):
      cart_item = models.ManyToManyField(CartToys)
  </code></pre>
  <p>I want to get all related toys to this cart. how can I do this</p>