Thank you Vishnu
On Sun, Jul 19, 2020 at 7:16 AM Vishnu Thuletiya <vishnuthulet...@gmail.com>
wrote:
> I think you can use 'select_related(name of foreign key class) ' insted of
> all().
>
> On Sun, 19 Jul 2020, 9:11 am karthik challa, <challakart...@gmail.com>
> wrote:
>
>> Hi Experts,
>>
>> I am trying to execute the below query and the query is taking more than
>> 5 minutes.
>>
>> Here are the details
>>
>> Model.py
>>
>> class Url(models.Model):
>> subdomain = models.ForeignKey(Subdomain, null=True, blank=True,
>> related_name='url_subdomain', on_delete=models.SET_NULL,db_index=True)
>> full_url = models.CharField(max_length=1000, unique=True, db_index=True)
>> class Meta:
>> ordering = ['full_url']
>>
>> def __str__(self):
>> return self.full_url
>>
>> 1>Django query ORM
>>
>> subdomains = Subdomain.objects.all().annotate(numItems=Count(
>> 'url_subdomain')).order_by('name')
>>
>> 2>SQL Query
>>
>> SELECT "urls_subdomain"."id", "urls_subdomain"."created_at",
>> "urls_subdomain"."name", COUNT("urls_url"."id") AS "numItems"
>> <http://localhost:8000/urls/search/#> FROM "urls_subdomain" LEFT OUTER
>> JOIN "urls_url" ON ("urls_subdomain"."id" = "urls_url"."subdomain_id")
>> GROUP BY "urls_subdomain"."id" ORDER BY "urls_subdomain"."name" ASC
>>
>> 3>Templates
>>
>> {% if subdomains %}
>> <div id="step-filter-tag" class="mb4">
>> <div class="b mb3">Subdomain</div>
>> <div class="overflow-auto" style="max-height: 16rem;">
>> {% for item in subdomains %}
>> item
>> {% endfor %}
>> </div>
>> </div>
>>
>> {% endif %}
>>
>> Please let me know how can i optimize the preformance Thanks & Regards,
>> Karthik
>>
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