title: Get instance by file name for a file in ImageField
body: <p><strong>Django 3.1.6</strong></p>
  <pre><code>class ResponsiveImage(models.Model):
      responsive_image = models.ImageField(upload_to=_raster_img_upload_to)
  </code></pre>
  <p>I want to find an instance by the image file_name:</p>
  <pre><code>file_name = 'img/raster/0a8449e7-8e50-4c02-853e-59a25592770d/img_144_96_fallback_3x_4.fallback'
  ResponsiveImage.objects.get(responsive_image__name=file_name)
  </code></pre>
  <p>But this gets an error:</p>
  <pre><code>{FieldError}Unsupported lookup 'name' for ImageField or join on the field not permitted.
  </code></pre>
  <p>Could you help me?</p>