title: Multiple images upload
body: <p>I was using this code form simple model (without any relations). But I've problem with two models, <code>Gallery</code> and <code>GalleryImage</code></p>
  
  <p><a href="https://github.com/Chive/django-multiupload" rel="nofollow noreferrer">https://github.com/Chive/django-multiupload</a></p>
  
  <pre><code>class Gallery(models.Model):
      title = models.CharField(max_length=200)
      date = models.DateField(auto_now_add=True)
      author = models.ForeignKey(User, blank=True)
  
  
  class GalleryImage(models.Model):
      gallery = models.ForeignKey(Gallery, on_delete=models.CASCADE, related_name='image_in_gallery')
      image = models.ImageField(upload_to='gallery/%Y/%m/%d')
      title = models.CharField(max_length=200)
  </code></pre>
  
  <p>What should <code>forms.py</code> in this case seems?</p>