date:20200211

AutoField & auto-incrementing

2020-02-11 Thread Bruckner de Villiers

Jason,

Thank you.  I have changed the title of this mail.  If I have read the 10 year 
old ticket 8576 correctly, it seems to be a DB restriction and I imagine that 
there are good reasons for this.  However, then I don’t understand the purpose 
of the AutoField given the restrictions and that the Django documentation is 
somewhat ambiguous/vague.

 

The options seem to be:
Your uuid suggestion (which I have never worked with, but will explore)
a function in the model that does the incrementing before committing – (anyone 
have some example code for this?).  The challenge would be to keep track of the 
last used ticket no.  I haven’t thought this through yet, but it does occur to 
me that one could use the id (maybe prefix the id with some starting digits) 
and write the record twice.  Probably barking up the wrong tree.
Regards,

 

Bruckner de Villiers

+27 83 625 1086

 

From:  on behalf of Jason 
Reply to: 
Date: Monday, 10 February 2020 at 14:55
To: Django users 
Subject: Re: Adding a verbose_name to id field

 

Hmm.  TIL about https://code.djangoproject.com/ticket/8576

 

Would a a uuid for this, rather than an integer?  If not, you'll have to 
implement a save override to handle the incrementing yourself.

 

In addition, it might be worthwhile bringing this ticket up for discussion at 
https://groups.google.com/forum/#!forum/django-developers

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Re: Django server is slow after moving database to remote VM

2020-02-11 Thread Simen Russnes

Yes, I'm able to get speeds of at least 1500KB/sec between the two, but it only
really happens when I do large queries like mysqldump for example. Most of the
time it's at around 300KB/s or less.

On 2/10/20 4:36 PM, Jody Fitzpatrick wrote:
Are the VM's within the same network/hosting company?

On Mon, Feb 10, 2020 at 8:38 AM Simen Russnes
mailto:si...@bio-me.com>> wrote:
Ever since I separated my server running the Django code (2.2.9), and my
MariaDB server (10.3), there has been a significant lag increase in my
application.

I've tried to limit the number of explicit requests to the server as the
round trip of opening and closing a connection now is obviously going to
be slower, but I've noticed that even when doing things like accessing a
standard ViewSet, serializing a Model the database can be very slow. One
thing in particular that got me worried is that when monitoring the
network traffic, I can see simultaneous upload and download speeds, when
I would expect only a very small sql request being uploaded, but still a
bigger download speed.

Are there any general recommendations I should consider implementing?

Regards,

Simen

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More than 3 modelforms in inlineformsets

2020-02-11 Thread Zameer Ahmed

Hi,
I have a situation where I need to have more than 3 nested forms for a
model with Foreignkey with child models. Can someone please point me in the
right direction because I've been trying this from last couple of days now.
I can make it work with 1 parent and 2-3 child but not further than that.

Regards,

Zaheer

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Invalid Literal for int() with base10 error

2020-02-11 Thread Santhosh sridhar



I have a model called Project,

class Project(models.Model):
name = models.CharField(max_length=50, unique=True)
technology = models.ForeignKey(Technology, 
related_name='projects',on_delete=models.CASCADE)
chipName = models.CharField(max_length=50)
is_swarm = models.NullBooleanField(default=0, blank=True, null=True)
p_state = models.ForeignKey(ProjectStage, related_name='projects', 
default=6,on_delete=models.CASCADE)
project_poc = models.TextField()
bto_date = models.DateField(blank=True, null=True)
mto_date = models.DateField(blank=True, null=True)
description = models.CharField(max_length=500, null=True)
last_updated = models.DateTimeField(auto_now_add=True)


def __str__(self):
return self.name

def save(self, *args, **kwargs):
"""
Overriding base save method to set the default values for few fields 
based on user inputs.
"""

if not self.mto_date:
self.mto_date = self.bto_date + timedelta(days=15)

super().save(*args, **kwargs)

In my views.py, I am trying to get Projects.objects.all() but I get this 
error : ValueError: invalid literal for int() with base 10: b'17 
04:47:27.864928'

What could be the issue? I am using Django 2.2.1 and Python 3.6 versions.

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