Filter images by foreign key - django

Question

I have an Image model and a Category model. I want to display only images of the corresponding category in my category_detail view.
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)
class Meta:
verbose_name_plural = "Categories"
def __str__(self):
return self.category_title
class Image(models.Model):
category = models.ForeignKey(Category, on_delete="CASCADE")
image = models.ImageField()
caption = models.CharField(max_length=250)
class Meta:
verbose_name_plural = "Images"
def __str__(self):
return str(self.image)
views.py
def category_detail_view(request, slug):
category = get_object_or_404(Category, slug=slug)
context = {
"gallery": Image.objects.filter(Category),
}
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 %}

Answer 1

You can filter these with:
def category_detail_view(request, slug):
category = get_object_or_404(Category, slug=slug)
context = {
'gallery': Image.objects.filter(category=category),
}
return render(request, 'main/category_detail.html', context)
or without fetching the category in a separate query:
You can filter these with:
def category_detail_view(request, slug):
context = {
'gallery': Image.objects.filter(category__slug=slug),
}
return render(request, 'main/category_detail.html', context)