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On Sun, 19 Jul 2020, 11:33 pm chinna, <challakart...@gmail.com> wrote:
> 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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