I thought select_related works for only FK/M2M and prefetch_related works
for only reverse relations, doesn't it?
Saygılarımla,
Sencer HAMARAT
On Fri, May 29, 2020 at 7:32 AM אורי <u...@speedy.net> wrote:
> Hi Soumen,
>
> Sometimes prefetch_related is much faster and more efficient than
> select_related. I usually prefer to use prefetch_related.
>
> Uri.
> אורי
> u...@speedy.net
>
>
> On Thu, May 28, 2020 at 12:42 AM Soumen Khatua <soumenkhatua...@gmail.com>
> wrote:
>
>> Actually I want to fetch all users from User table and users location
>> from Location table which is many to many relation from same Profile table.
>> Is it possible???
>>
>> On Thu 28 May, 2020, 2:54 AM Soumen Khatua, <soumenkhatua...@gmail.com>
>> wrote:
>>
>>> Now I'm facing one problem whenever I'm trying to iterate a loop I'm
>>> getting too many SQL variables. Actually after iterating the loop I want to
>>> render all the value in the template.
>>> if could you resolve this it would be very good for me.
>>> Thank you for your time and response
>>>
>>> Regards,
>>> Soumen
>>>
>>>
>>> On Thu, May 28, 2020 at 2:12 AM Chetan Ganji <ganji.che...@gmail.com>
>>> wrote:
>>>
>>>>
>>>> Profile.objects.filter().select_related("user").prefetch_related("location")
>>>>
>>>> On Thu, May 28, 2020, 2:01 AM Soumen Khatua <soumenkhatua...@gmail.com>
>>>> wrote:
>>>>
>>>>> I also know about this concept but I don't how I can achieve it, Could
>>>>> you give me an example?
>>>>> Suppose I have:
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>> *class Profile(models.Model): user = models.OneToOneField(
>>>>> settings.AUTH_USER_MODEL, on_delete = models.CASCADE,
>>>>> related_name="profile" ) location =
>>>>> models.ManyToManyField(Location)*
>>>>>
>>>>>
>>>>> Thank you
>>>>>
>>>>> Regards,
>>>>> Soumen
>>>>>
>>>>> On Wed, May 27, 2020 at 7:20 PM Chetan Ganji <ganji.che...@gmail.com>
>>>>> wrote:
>>>>>
>>>>>> select_related for fk and prefetch_related for m2m in django, you can
>>>>>> chain them together
>>>>>>
>>>>>> Regards,
>>>>>> Chetan Ganji
>>>>>> +91-900-483-4183
>>>>>> ganji.che...@gmail.com
>>>>>> http://ryucoder.in
>>>>>>
>>>>>>
>>>>>> On Wed, May 27, 2020 at 4:51 PM Soumen Khatua <
>>>>>> soumenkhatua...@gmail.com> wrote:
>>>>>>
>>>>>>> Hi Folks,
>>>>>>> I have many to many relationships and Foreign Key in the table, I'm
>>>>>>> using select_realted(foreign key filed name) to optimize the query but I
>>>>>>> want to fetch many to many and foreign key at the same time , How I can
>>>>>>> do
>>>>>>> this in very optimized way?
>>>>>>>
>>>>>>> Thank You
>>>>>>> Regards,
>>>>>>> Soumen
>>>>>>>
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