is this is the right way to use prefetch_related?

i have these models

class Theme(models.Model):
    name = models.charfield()

class Category(models.Model):
    name = models.charfield()

class Product(models.Model):
    name = models.charfield()
    .........

class MstProduct(Product):
    category = models.ForeignField(Category, related_name = 'category_products')
    themes = models.ManyToManyField(Theme, related_name='theme_products')
    .........

i want to fetch categories and there related products by

Category.objects.prefetch_related('category_products').select_related('category_products__themes')

is this is the right way to do this?

source https://stackoverflow.com/questions/73178385/is-this-is-the-right-way-to-use-prefetch-related