Django ORM - Translate this self join query to ORM

Question

Please help translate this SQL query to Django ORM query.

select l.* from products l inner join products r on l.category = r.category where r.id = %s

Please note that category is itself a ForeignKey that points to ProductCategory Model (telling in case it's useful for you). Also, if possible combine this with this ORM query.

Product.objects.prefetch_related('productrecipes', 'farmerprofiles', 'productfeedbacks')

Please help. Thank you.

Answer 1

Assuming that you want all the products from the same category as a given Product :

 # given product
 product = Product.objects.get(...)
 # products from same category
 related_products = Product.objects.filter(category_id=product.category_id)

You can then just append your prefetch_related calls:

 related_products = related_products.prefetch_related(...)