Re: Is async class-based view available?

[kazuki]

I know this However, I don't know how to use it.
How can I use this to create an asynchronous AsyncListView or 
AsyncTemplateView?

2021年6月9日水曜日 13:28:16 UTC+9 sutharl...@gmail.com:

> https://docs.djangoproject.com/en/3.2/topics/async/
>
> On Wed, 9 Jun 2021 at 08:11, kazuki  wrote:
>
>> I'm already using a web application that takes advantage of class-based 
>> views. And I want to take advantage of the async class-based view.
>> However, I can't find any information when I look it up. Is there a class 
>> such as async_view? I want to use TemplateView and ListView asynchronously.
>>
>> -- 
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>>  
>> 
>> .
>>
>

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Re: [DRF] Serializing a field of type choice

[Lalit Suthar]

can I see that model field, I don't think any extra configuration is
required for it

On Thu, 10 Jun 2021 at 04:44, ezequia...@gmail.com 
wrote:

> Hey guys
>
> Could you help me with a Django Rest Framework question?
>
> I have a field in my model that has possible input values, so I'm using
> the *choices=* attribute in my model.
>
> I'm having difficulty serializing the return of this data in drf.
>
> Could someone give me a hint on how best to implement this, please?
>
> Sincerely
> Hezekiah Rock
>
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> 
> .
>

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Re: RelatedObjectDoesNotExist: User has no vendor

[Indu Chouhan]

Hi ,

You can also try this.

vendor = User.objects.get(pk=request.user.id).vender

Thanks,
Indu Chouhan

On Wednesday, June 9, 2021 at 12:44:14 PM UTC+5:30 gwisum...@gmail.com 
wrote:

> Hi Every one! I 'm looking for help.
>
> I'm working with  a multi vendor website using django. But there is an 
> issue that I have vendor object vendor but it says User has no vendor. Why 
> is this happening and how may I solve this?
>
> *MY model*
>
> from django.contrib.auth.models import Userfrom django.db import models*class 
> Vendor*(models.Model):
> name = models.CharField(max_length=255)
> created_at = models.DateTimeField(auto_now_add=True)
> created_by = models.OneToOneField(User, related_name='vendor', 
> on_delete=models.CASCADE)
> class Meta:
> ordering = ['name']
>
> def __str__(self):
> return self.name
>
> *My View*
> *def become_vendor(request)*:
> if request.method == 'POST':
> form = UserCreationForm(request.POST)
> if form.is_valid():
> user = form.save()
> login(request, user)
> vendor = Vendor.objects.create(name=user.username, 
> created_by=user)
> return redirect('frontpage')
>
> else:
> form = UserCreationForm()
> return render(request, 'vendor/become_vendor.html', {'form': form})
> @login_requireddef vendor_admin(request):
> vendor = request.user.vendor
> return render(request, 'vendor/vendor_admin.html', {'vendor': vendor})
>
> *Error i'm getting*
> RelatedObjectDoesNotExist at /maduka/vendor_admin/ 
>
> User has no vendor.
>
> Request Method: GET 
> Request URL: http://127.0.0.1:8000/maduka/vendor_admin/ 
> Django Version: 3.1.3 
> Exception Type: RelatedObjectDoesNotExist 
> Exception Value: 
>
> User has no vendor.
>
>
>
>
>
>
>
>
>
>
>
>

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[DRF] Serializing a field of type choice

[ezequia...@gmail.com]

Hey guys

Could you help me with a Django Rest Framework question?

I have a field in my model that has possible input values, so I'm using the 
*choices=* attribute in my model.

I'm having difficulty serializing the return of this data in drf.

Could someone give me a hint on how best to implement this, please?

Sincerely
Hezekiah Rock

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Re: My first django project works in mylaptop, locally, but not when deployed

[Software, Web Developer]

Hello somebody to help me with this

On Wed, Jun 9, 2021 at 3:47 AM AliHassanRaza Khan 
wrote:

> You have to install Django first
> pip install django
>
> On Wed, 9 Jun 2021, 1:24 am Douglas Lopez, 
> wrote:
>
>> Maybe some body can help on this.
>>
>> I have a very simple apps ("Hello work"). See mysite.zip attached.
>> Then I follow the procedures established in the host, see:
>>
>> https://www.a2hosting.com/kb/cpanel/cpanel-software/using-the-python-selector
>> Including the creation of environment, see consola.png attached.
>>
>> But, when I try to execute  through
>>  http://semcel.net/mysite or http://semcel.net/mysite/hola,  the
>> response  obtained is,  "It works! Python 3.8.6", instead of show me "Hola
>> Mundo".
>> Any idea of what is happening?
>> I really appreciated your help.
>> Best regards,
>> Douglas Lopez
>> Venezuela
>>
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>> 
>> .
>>
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> 
> .
>

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Re: RelatedObjectDoesNotExist: User has no vendor

[Lalit Suthar]

vendor = Vendor.objects.get(created_by=request.user)
you have to pick vendor like this

On Wed, 9 Jun 2021 at 15:43, GWISU MANYANDA  wrote:

> thank you Lalit for you respond
> I have changed this line
>
>  vendor = request.user.vendor
>
> to
>
> user = vendor.created_by
>
> Now i'm getting this error
>
> NameError at /maduka/vendor_admin/
>
> name 'vendor' is not defined
>
>
> On Wed, Jun 9, 2021 at 11:10 AM Lalit Suthar 
> wrote:
>
>> coming because of `vendor = request.user.vendor`
>> you have attached user to vendor so you can access user from vendor by
>> doing
>> `user = vendor.created_by` but you can not access vendor from user
>>
>> On Wed, 9 Jun 2021 at 12:43, GWISU MANYANDA 
>> wrote:
>>
>>> Hi Every one! I 'm looking for help.
>>>
>>> I'm working with  a multi vendor website using django. But there is an
>>> issue that I have vendor object vendor but it says User has no vendor. Why
>>> is this happening and how may I solve this?
>>>
>>> *MY model*
>>>
>>> from django.contrib.auth.models import Userfrom django.db import 
>>> models*class Vendor*(models.Model):
>>> name = models.CharField(max_length=255)
>>> created_at = models.DateTimeField(auto_now_add=True)
>>> created_by = models.OneToOneField(User, related_name='vendor', 
>>> on_delete=models.CASCADE)
>>> class Meta:
>>> ordering = ['name']
>>>
>>> def __str__(self):
>>> return self.name
>>>
>>> *My View*
>>> *def become_vendor(request)*:
>>> if request.method == 'POST':
>>> form = UserCreationForm(request.POST)
>>> if form.is_valid():
>>> user = form.save()
>>> login(request, user)
>>> vendor = Vendor.objects.create(name=user.username, 
>>> created_by=user)
>>> return redirect('frontpage')
>>>
>>> else:
>>> form = UserCreationForm()
>>> return render(request, 'vendor/become_vendor.html', {'form': form})
>>> @login_requireddef vendor_admin(request):
>>> vendor = request.user.vendor
>>> return render(request, 'vendor/vendor_admin.html', {'vendor': vendor})
>>>
>>> *Error i'm getting*
>>> RelatedObjectDoesNotExist at /maduka/vendor_admin/
>>>
>>> User has no vendor.
>>>
>>> Request Method: GET
>>> Request URL: http://127.0.0.1:8000/maduka/vendor_admin/
>>> Django Version: 3.1.3
>>> Exception Type: RelatedObjectDoesNotExist
>>> Exception Value:
>>>
>>> User has no vendor.
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>> --
>>> You received this message because you are subscribed to the Google
>>> Groups "Django users" group.
>>> To unsubscribe from this group and stop receiving emails from it, send
>>> an email to django-users+unsubscr...@googlegroups.com.
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>>> 
>>> .
>>>
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>> 
>> .
>>
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> 
> .
>

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Re: Absurdly long queries with Postgres 11 during unit tests

[Chetan Ganji]

This might help shed more light on the problem.

   1. https://pypi.org/project/pytest-django-queries/
   2. Try cProfile
   https://www.geeksforgeeks.org/profiling-in-python/



Regards,
Chetan Ganji
+91-900-483-4183
ganji.che...@gmail.com
http://ryucoder.in


On Tue, Jun 8, 2021 at 1:33 AM Rich Rauenzahn  wrote:

> This is heads up in case anyone sees something similar:
>
> I have managed to trigger this degenerate query case in two completely
> different Django 2.2 projects.   In production with a normal sized dataset,
> the query time is fine.  But during unit testing with a small subset of the
> data, the queries took a long time.  A LONG time.
>
> In the most recent case each query took 100x longer.  200+ seconds instead
> of 2 seconds.  The unit test dataset isn't very large because it's a unit
> test.
>
> I think I may have first seen this when I upgraded the project to postgres
> 11.
>
> Manually vacuuming between tests resolves the issue.  (Yes, autovacuum is
> on by default -- and isn't the db created from scratch for each 'manage
> test' invocation?)
>
> This is how I did it:
>
> def _vacuum():
> # Some unit test queries seem to take a much longer time.
> # Let's try vacuuming.
> # https://stackoverflow.com/a/13955271/2077386
> with connection.cursor() as cursor:
> logger.info("Vacuum: begin")
> cursor.execute("VACUUM ANALYZE")
> logger.info("Vacuum: complete")
>
> class VacuumMixin:
> @classmethod
> def setUpClass(cls):
> _vacuum()
> return super().setUpClass()
>
> @classmethod
> def tearDownClass(cls):
> ret = super().tearDownClass()
> _vacuum()
> return ret
>
> If anyone else sees this, please let me know.  Maybe we can further RCA it.
>
>
>
> --
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> 
> .
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Re: RelatedObjectDoesNotExist: User has no vendor

[GWISU MANYANDA]

thank you Lalit for you respond
I have changed this line

 vendor = request.user.vendor

to

user = vendor.created_by

Now i'm getting this error

NameError at /maduka/vendor_admin/

name 'vendor' is not defined


On Wed, Jun 9, 2021 at 11:10 AM Lalit Suthar 
wrote:

> coming because of `vendor = request.user.vendor`
> you have attached user to vendor so you can access user from vendor by
> doing
> `user = vendor.created_by` but you can not access vendor from user
>
> On Wed, 9 Jun 2021 at 12:43, GWISU MANYANDA 
> wrote:
>
>> Hi Every one! I 'm looking for help.
>>
>> I'm working with  a multi vendor website using django. But there is an
>> issue that I have vendor object vendor but it says User has no vendor. Why
>> is this happening and how may I solve this?
>>
>> *MY model*
>>
>> from django.contrib.auth.models import Userfrom django.db import 
>> models*class Vendor*(models.Model):
>> name = models.CharField(max_length=255)
>> created_at = models.DateTimeField(auto_now_add=True)
>> created_by = models.OneToOneField(User, related_name='vendor', 
>> on_delete=models.CASCADE)
>> class Meta:
>> ordering = ['name']
>>
>> def __str__(self):
>> return self.name
>>
>> *My View*
>> *def become_vendor(request)*:
>> if request.method == 'POST':
>> form = UserCreationForm(request.POST)
>> if form.is_valid():
>> user = form.save()
>> login(request, user)
>> vendor = Vendor.objects.create(name=user.username, 
>> created_by=user)
>> return redirect('frontpage')
>>
>> else:
>> form = UserCreationForm()
>> return render(request, 'vendor/become_vendor.html', {'form': form})
>> @login_requireddef vendor_admin(request):
>> vendor = request.user.vendor
>> return render(request, 'vendor/vendor_admin.html', {'vendor': vendor})
>>
>> *Error i'm getting*
>> RelatedObjectDoesNotExist at /maduka/vendor_admin/
>>
>> User has no vendor.
>>
>> Request Method: GET
>> Request URL: http://127.0.0.1:8000/maduka/vendor_admin/
>> Django Version: 3.1.3
>> Exception Type: RelatedObjectDoesNotExist
>> Exception Value:
>>
>> User has no vendor.
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>> --
>> You received this message because you are subscribed to the Google Groups
>> "Django users" group.
>> To unsubscribe from this group and stop receiving emails from it, send an
>> email to django-users+unsubscr...@googlegroups.com.
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>> 
>> .
>>
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> 
> .
>

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Re: RelatedObjectDoesNotExist: User has no vendor

[Lalit Suthar]

coming because of `vendor = request.user.vendor`
you have attached user to vendor so you can access user from vendor by doing
`user = vendor.created_by` but you can not access vendor from user

On Wed, 9 Jun 2021 at 12:43, GWISU MANYANDA  wrote:

> Hi Every one! I 'm looking for help.
>
> I'm working with  a multi vendor website using django. But there is an
> issue that I have vendor object vendor but it says User has no vendor. Why
> is this happening and how may I solve this?
>
> *MY model*
>
> from django.contrib.auth.models import Userfrom django.db import models*class 
> Vendor*(models.Model):
> name = models.CharField(max_length=255)
> created_at = models.DateTimeField(auto_now_add=True)
> created_by = models.OneToOneField(User, related_name='vendor', 
> on_delete=models.CASCADE)
> class Meta:
> ordering = ['name']
>
> def __str__(self):
> return self.name
>
> *My View*
> *def become_vendor(request)*:
> if request.method == 'POST':
> form = UserCreationForm(request.POST)
> if form.is_valid():
> user = form.save()
> login(request, user)
> vendor = Vendor.objects.create(name=user.username, 
> created_by=user)
> return redirect('frontpage')
>
> else:
> form = UserCreationForm()
> return render(request, 'vendor/become_vendor.html', {'form': form})
> @login_requireddef vendor_admin(request):
> vendor = request.user.vendor
> return render(request, 'vendor/vendor_admin.html', {'vendor': vendor})
>
> *Error i'm getting*
> RelatedObjectDoesNotExist at /maduka/vendor_admin/
>
> User has no vendor.
>
> Request Method: GET
> Request URL: http://127.0.0.1:8000/maduka/vendor_admin/
> Django Version: 3.1.3
> Exception Type: RelatedObjectDoesNotExist
> Exception Value:
>
> User has no vendor.
>
>
>
>
>
>
>
>
>
>
>
> --
> You received this message because you are subscribed to the Google Groups
> "Django users" group.
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> email to django-users+unsubscr...@googlegroups.com.
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> 
> .
>

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RelatedObjectDoesNotExist: User has no vendor

[GWISU MANYANDA]

Hi Every one! I 'm looking for help.

I'm working with  a multi vendor website using django. But there is an
issue that I have vendor object vendor but it says User has no vendor. Why
is this happening and how may I solve this?

*MY model*

from django.contrib.auth.models import Userfrom django.db import
models*class Vendor*(models.Model):
name = models.CharField(max_length=255)
created_at = models.DateTimeField(auto_now_add=True)
created_by = models.OneToOneField(User, related_name='vendor',
on_delete=models.CASCADE)
class Meta:
ordering = ['name']

def __str__(self):
return self.name

*My View*
*def become_vendor(request)*:
if request.method == 'POST':
form = UserCreationForm(request.POST)
if form.is_valid():
user = form.save()
login(request, user)
vendor = Vendor.objects.create(name=user.username, created_by=user)
return redirect('frontpage')

else:
form = UserCreationForm()
return render(request, 'vendor/become_vendor.html', {'form': form})
@login_requireddef vendor_admin(request):
vendor = request.user.vendor
return render(request, 'vendor/vendor_admin.html', {'vendor': vendor})

*Error i'm getting*
RelatedObjectDoesNotExist at /maduka/vendor_admin/

User has no vendor.

Request Method: GET
Request URL: http://127.0.0.1:8000/maduka/vendor_admin/
Django Version: 3.1.3
Exception Type: RelatedObjectDoesNotExist
Exception Value:

User has no vendor.

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