I want to use prefetch_related with Django's DetailView.
Model:
class Customer(models.Model):
name = models.CharField(
verbose_name='customer name',
max_length=100
)
# Other fields
class Packet(models.Model):
customer = models.ForeignKey(
Customer
)
# Other fields
class Credit(models.Model) :
customer = models.ForeignKey(
Customer
)
# Other fields
View:
class CustomerDetailsView(LoginRequiredMixin, DetailView):
model = Customer
http_method_names = ['get']
template_name = 'detail_templates/customer_details.html'
Templates:
{% for p in object.packet_set %}
{{ do something }}
{% endif %}
{% for p in object.credit_set %}
{{ do something }}
{% endif %}
Tried:
class CustomerDetailsView(LoginRequiredMixin, DetailView):
model = Customer
http_method_names = ['get']
template_name = 'detail_templates/customer_details.html'
def get_queryset(self):
queryset = super(CustomerDetailsView, self).get_queryset()
pk = self.kwargs.get(self.pk_url_kwarg, None)
return queryset.filter(id=pk).prefetch_related('packet_set', 'credit_set')
debug_toolbar shows no improvement. How do I prefetch_related packet and credit
There is no sense to use prefetch_related() in the DetailView. This view loads the single master object with get() while prefetch_related() is usable for loading related objects of multiple master objects.
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