'ImageFileDescriptor' object has no attribute 'objects' - django

Question

I'm trying to iterate through the images in my categories but I'm getting 'ImageFileDescriptor' object has no attribute 'objects' error
models.py
class Category(models.Model):
category_title = models.CharField(max_length=200)
category_image = models.ImageField(upload_to="category")
category_description = models.TextField()
slug = models.SlugField(max_length=200, unique=True, default=1)
def get_image_path(self, filename):
gallery_path = os.path.abspath(
os.path.join(settings.MEDIA_ROOT, self.slug))
if not os.path.isdir(gallery_path):
os.mkdir(gallery_path)
return os.path.join(gallery_path, filename)
gallery = models.ImageField(upload_to=get_image_path)
def create_directory(self):
gallery_path = os.path.abspath(
os.path.join(settings.MEDIA_ROOT, self.slug))
if not os.path.isdir(gallery_path):
os.mkdir(gallery_path)
def save(self, *args, **kwargs):
if not self.pk:
self.create_directory()
super().save(*args, **kwargs)
def delete(self, *args, **kwargs):
shutil.rmtree(os.path.join(settings.MEDIA_ROOT, self.slug))
# os.rmdir(os.path.join(settings.MEDIA_ROOT, self.slug))
super().delete(*args, **kwargs)
class Meta:
verbose_name_plural = "Categories"
def __str__(self):
return self.category_title
views.py
def category_detail_view(request, slug):
category = get_object_or_404(Category, slug=slug)
context = {
"gallery": Category.gallery.objects.all(),
}
return render(request, 'main/category_detail.html', context)
category_detail.html
{% for image in gallery %}
<div class="col-md-4">
<a href="{{ image.url }}"> <img src="{{ image.url }}" class="img-responsive img-thumbnail" width="304" height="236"/>
</a>
</div>
{% endfor %}
For some reason creating galleries in Django has been difficult for me. It seems as if there is no standard way that most people are doing this. Even if I get this to work, I don't see how one could manage the uploaded images from the admin panel. ex upload delete arrange etc
If you could shed some light on this for me that would be awesome