Mike Dewhirst writes:
> On 18/05/2021 3:18 pm, Mike Dewhirst wrote:
>> On 18/05/2021 3:14 pm, Pankaj Jangid wrote:
>>> I have an application from 3.1.x and in 3.2 we have to explicitly state
>>> this to make it compatible i.e. without any warning:
>>>
>>> DEFAULT_AUTO_FIELD = 'django.db.models.Au
On 18/05/2021 3:18 pm, Mike Dewhirst wrote:
On 18/05/2021 3:14 pm, Pankaj Jangid wrote:
I have an application from 3.1.x and in 3.2 we have to explicitly state
this to make it compatible i.e. without any warning:
DEFAULT_AUTO_FIELD = 'django.db.models.AutoField'
Now suppose I want to change th
On 18/05/2021 3:14 pm, Pankaj Jangid wrote:
I have an application from 3.1.x and in 3.2 we have to explicitly state
this to make it compatible i.e. without any warning:
DEFAULT_AUTO_FIELD = 'django.db.models.AutoField'
Now suppose I want to change this to BigAutoField. What all changes I’ll
hav
I have an application from 3.1.x and in 3.2 we have to explicitly state
this to make it compatible i.e. without any warning:
DEFAULT_AUTO_FIELD = 'django.db.models.AutoField'
Now suppose I want to change this to BigAutoField. What all changes I’ll
have to make in the application. Or do I just nee
null=True and blank=True to the field?
>> On 4/26/20 6:38 PM, Mayur Bagul wrote:
>>
>> Hey thanks for your response i did so because initially at the time of
>> migration it was asking for default value and i just putted false in rush.
>> that filed user from User mod
lue for each specific field
>
> Sent from Mail for Windows 10
>
> From: Mayur Bagul
> Sent: Sunday, 26 April 2020 18:39
> To: Django users
> Subject: Re: The database backend does not accept 0 as a value for AutoField.
>
> Hey thanks for your response i did so beca
st putted false in rush.
> that filed user from User model returns username as string autofield so
> what shall i put as default their?
> i tried to put None for default value but while migrating it giving same
> error :--
>
> line 192, in validate_autopk_value
> raise V
username as string
> autofield so what shall i put as default their?
> i tried to put None for default value but while migrating it giving
> same error :--
>
> |
> line 192,invalidate_autopk_value
> raiseValueError('The database backend does not accept 0 as a
backend does not accept 0 as a value for AutoField. Hey thanks for your response i did so because initially at the time of migration it was asking for default value and i just putted false in rush. that filed user from User model returns username as string autofield so what shall i put as default
Also, Please make sure that any foreign key fields are not default nulls Sent from Mail for Windows 10 From: Mayur BagulSent: Sunday, 26 April 2020 18:39To: Django usersSubject: Re: The database backend does not accept 0 as a value for AutoField. Hey thanks for your response i did so because
Hey thanks for your response i did so because initially at the time of
migration it was asking for default value and i just putted false in rush.
that filed user from User model returns username as string autofield so
what shall i put as default their?
i tried to put None for default value but
Think you shouldn’t use false as a default for fields which are not bool
Sent from Mail for Windows 10
From: Antje Kazimiers
Sent: Sunday, 26 April 2020 17:40
To: django-users@googlegroups.com
Subject: Re: The database backend does not accept 0 as a value for AutoField.
setting default=False is
setting default=False is odd for any field other than a BooleanField. I
would take that out for the OneToOneField at least and see how things go.
Antje
On 4/26/20 4:19 PM, Mayur Bagul wrote:
> Hello guys,
>
> im stucked with this error mentioned in subject.
> below link redirect details about que
Hello guys,
im stucked with this error mentioned in subject.
below link redirect details about question.
https://stackoverflow.com/q/61427882/11351226
let me know how to get rid of this problem.
Thanking You.
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"Djan
>> "/home/lenovo/.local/lib/python3.7/site-packages/django/db/models/sql/compiler.py"
>>> , line 1335, in as_sql
>>> for obj in self.query.objs
>>> File
>>> "/home/lenovo/.local/lib/python3.7/site-packages/django/db/models/sql/compiler.
ery.objs
>> File
>> "/home/lenovo/.local/lib/python3.7/site-packages/django/db/models/sql/compiler.py"
>> , line 1334, in
>> [self.prepare_value(field, self.pre_save_val(field, obj)) for field
>> in fields]
>> File
>> "/home/lenovo/.local/lib/python3.7/s
ields]
> File
> "/home/lenovo/.local/lib/python3.7/site-packages/django/db/models/sql/compiler.py"
> , line 1275, in prepare_value
> value = field.get_db_prep_save(value, connection=self.connection)
> File
> "/home/lenovo/.local/lib/python3.7/site-packages/d
Useful, thanks Mike.
Bruckner de Villiers
083 625 1086
On 2020/02/12, 23:18, "Mike Dewhirst" wrote:
On 12/02/2020 6:54 pm, Mike Dewhirst wrote:
> def save(self, *args, **kwargs):
> self._pre_save()# stuff to be computed pre-save
> super().save(*args, **kwargs)
>
On 12/02/2020 6:54 pm, Mike Dewhirst wrote:
def save(self, *args, **kwargs):
self._pre_save() # stuff to be computed pre-save
super().save(*args, **kwargs)
self._post_save() # stuff to be done after the save
Also of occasional value ...
def save(self, *args, **kwargs):
wha
ket 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.
> >
> &
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 a
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:
>
> * Y
e:
>
> 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
> understa
Jason,
I cracked the uuid option – what an ugly ticket no.!!! -
0273051c-af54-4baf-91b9-651701d9020c
Bruckner de Villiers
083 625 1086
From: Bruckner de Villiers
Date: Tuesday, 11 February 2020 at 10:06
To:
Subject: AutoField & auto-incrementing
Jason,
Thank you. I have cha
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
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
an Ngallen
On 27 May 2019, 07:30 +0300, Saeed Pooladzadeh , wrote:
>
> But I have just one AutoField()!!!
> در دوشنبه 27 مهٔ 2019، ساعت 5:40:19 (UTC+4:30)، Yoo نوشته:
> > Probably because you have two AutoFields. You can’t have two in the same
> > model. Set this to eid=mo
But I have just one AutoField()!!!
در دوشنبه 27 مهٔ 2019، ساعت 5:40:19 (UTC+4:30)، Yoo نوشته:
>
> Probably because you have two AutoFields. You can’t have two in the same
> model. Set this to eid=models.AutoField(primary_key=True)
>
> This is because Django models automatica
Probably because you have two AutoFields. You can’t have two in the same
model. Set this to eid=models.AutoField(primary_key=True)
This is because Django models automatically makes an id autofield primary
key if nothing else is set as pk.
On Sun, May 26, 2019 at 9:05 PM Bob Gailer wrote:
>
On May 26, 2019 8:16 PM, "Saeed Pooladzadeh" wrote:
>
>
> Hi
>
> When I add this line in my model:
>
> eid=models.AutoField()
>
> I see error in my migration!!
>
> What is the problem?
>
> I don't know what your problem is but our problem is that we have no idea
what error you got. Please copy and
Hi
When I add this line in my model:
eid=models.AutoField()
I see error in my migration!!
What is the problem?
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Question: How can I display an AutoField in a ModelForm. I have a need
where a Form is generated and displayed. Based on the input, I need to
read the AutoField's value and search for it in my database.
My form:
class CheckinPatientMetaForm(ModelForm):
class Meta:
A model was designed with a wrong assumption of uniqueness and given a
natural key. We now need to switch to a surrogate primary key.
Upgrading Django is currently not an option. The production database
may not be dropped/restored for this, it is in use by several
unrelated projects (remember the t
> > > widget.save()
> > >
> > > That should do the trick. Another option could be using table
> > > triggers to automate
> > > that within a database table trigger(s).
> > >
> > > On Mon, 12 Jan 2015 21:26:54 -0800 (PST)
> > >
> > that within a database table trigger(s).
> >
> > On Mon, 12 Jan 2015 21:26:54 -0800 (PST)
> > Matt Cooper > wrote:
> >
> > > I'm building a multi-tenant application with a data model that
> > simplifies
> > > to:
> > &g
> I'm building a multi-tenant application with a data model that
> simplifies
> > to:
> >
> > class Tenant(models.Model):
> > name = models.CharField(max_length=50)
> >
> > class Widget(models.Model):
> > owner = models.ForeignKey(Ten
dget(models.Model):
> owner = models.ForeignKey(Tenant)
> sequence_id =
>
>
> I want Widget.sequence_id to work like an AutoField (that is, automatically
> give me something unique and generally incrementing by 1) but scoped to a
> single Widget.owner. So for instance
I'm building a multi-tenant application with a data model that simplifies
to:
class Tenant(models.Model):
name = models.CharField(max_length=50)
class Widget(models.Model):
owner = models.ForeignKey(Tenant)
sequence_id =
I want Widget.sequence_id to work like an AutoField
Hi,
I'm trying to save space in database rows in tables that have bigint-sized
numbers of rows. One of the things I'm trying to do is using a smallint for
the `id` on one of the models that is pointed to from those big tables:
I have a model A with a custom AutoField for its primar
On Aug 19, 2:05 pm, Lee wrote:
> Landy - thanks for that idea. Am I correct in understanding that
> setting a field to AutoField has no effect on save_model, and simply
> causes dbsync to add the sequence/nextval to the Postgres table?
I am not sure; On a droid phone so I can'
Landy - thanks for that idea. Am I correct in understanding that
setting a field to AutoField has no effect on save_model, and simply
causes dbsync to add the sequence/nextval to the Postgres table? If so
that is my problem, because I want to have one database schema that
works across different
Did you create the table using django?
Can you post the table definition in postgresql?
If you still have an empty database, you could try dropping the id
column and do a django dbsync
otherwise you may have to create a sequence and apply it to the id
field. Something along the lines of:
creat
<>
Did so -- no effect. I even disabled my overridden save_model so I'm
back to out-of-the-box Admin setup -- no effect. This is with Postgres
and the psycopg2 driver. Is no one else seeing this problem?
On Aug 18, 5:32 pm, Shawn Milochik wrote:
> As defined your id field doesn't differ from Dja
As defined your id field doesn't differ from Django's default. Just get
rid of your custom id field.
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obj, form, change):
if change:
obj.updated_by = request.user.username
else:
obj.created_by = request.user.username
obj.save()
Any ideas on how to restore the AutoField functionality?
Thanks-
--
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My existing database schema has a primary key field named "id" in every
table. I want to have Django Admin automatically populate this field and
display it in read-only mode in both the change list and edit form.
Because the field name is "id", I understand that this will automatically be
included
Have a look at this thread:
http://groups.google.com/group/django-users/browse_thread/thread/deda522d2545325e/bbaa8edbeda204e3?lnk=gst&q=production+number#bbaa8edbeda204e3
The author has a similar problem i.e. he says:
"There is a high risk of concurrency so just finding the previous max
and the
Correction: I meant for the third ticket to have pk: 3.
On Oct 21, 3:18 pm, Yo-Yo Ma wrote:
> Example:
>
> Company has many Tickets
> Tickets have a PK, as well as a "number".
> Each Ticket's "number" should be the highest prior "number" for a
> Ticket with the same Company
>
> Ticket: pk: 1, num
Example:
Company has many Tickets
Tickets have a PK, as well as a "number".
Each Ticket's "number" should be the highest prior "number" for a
Ticket with the same Company
Ticket: pk: 1, number: 1, company: XYZ
Ticket: pk: 2, number: 1, company: Acme
Ticket: pk: 1, number: 2, company: XYZ
unique_
t an object's id is unique over
> > all objects, even deleted ones.
>
> The behavior of AutoField key allocation is entirely dependent on the
> database you are using. You'll need to spend some quality time with
> the documentation for your chosen database to determine
> My application relies on the fact that an object's id is unique over
> all objects, even deleted ones.
The behavior of AutoField key allocation is entirely dependent on the
database you are using. You'll need to spend some quality time with
the documentation for your chosen datab
ably used by Django for the AutoField. It seems to me
that the serial sequence generator is not well suited for re-using
deleted elements, but I'm not sure. It would be great if a Django or
general database expert could calrify this.
Best Regards,
Dirk
On Oct 10, 3:39 am, George Silva wrote
I'm pretty sure that OID is not reused. It's database behavior to control
this and my guess is that Django does not use old object ids.
Futhermore there is a simple test that you can do:
Create a new object, delete it. Create a new object and check it's id.
George
On Sat, Oct 9, 2010 at 9:51 PM
If I use
id = models.AutoField(primary_key=True)
can I be sure that if an object is removed from the db by calling
its .delete() method, the respective id will not be used for any
subsequent .save() on a new object?
My application relies on the fact that an object's id is unique over
all objects
Hello,
I'd like to have a numeric field that is shown in the admin and in the
model form, the value entered by the user is saved, if no value is
entered, the next sequence number is assigned by the database. Is there
an easy way to do that? Or should I override the model's save method and
use a cu
What is the maximal value for an AutoField?
When that value is reached, does it "wrap" around to 0, or does
something else occur?
Is it database-backend dependent?
I can't find it in the documentation, nor on this mailing list.
Thank you.
--~--~-~--~~~-
I want an autofield that shows the content in admin.
If I put an autofield it's hidden, if I put an IntegerField it doesn't
have a new automatic default value.
Is there a solution?
--
Alessandro Ronchi
Skype: aronchi
http://www.alessandroronchi.net
SOASI Soc.Coop. - www.soasi.co
hin django that does it. I'd rather not have sql statements
> with hardcoded values (sequence name) included in my python code (unless I
> absolutely have to).
The idea behind an AutoField is that the database assigns that field
the next value from a sequence upon INSERT. You don't have
I'm writing a django application (postgresql db) that needs to deal with
input both from GUI (webserver) and commandline (parsing text input).
I've got a model defined where I explicitly define the id field using:
id = models.AutoField(primary_key = True)
When I'm creating a new entry, is th
Hi ALL!
If I use ModelForm + FormPreview + form.save() call in done() it never
update objects if PK is AutoField, but always create them, why it can
be so? FormPreview doesn't store PK value enywhere (ex.: to use in
form.instance.pk to determine that it is an update not create) ?
I red
On Sat, 2008-03-08 at 19:18 -0600, Michael Hipp wrote:
> I have a legacy database that happens to be PostgreSQL. It has this primary
> key field:
>
> CREATE TABLE foo (
> id integer PRIMARY KEY,
>
> When I do 'inspectdb' it gives me a model with this in it:
>
> class Foo(mo
I have a legacy database that happens to be PostgreSQL. It has this primary
key field:
CREATE TABLE foo (
id integer PRIMARY KEY,
When I do 'inspectdb' it gives me a model with this in it:
class Foo(models.Model):
id = models.IntegerField(primary_key=True)
But what
On Thu, 2008-02-14 at 15:49 +0530, Sairam Krishnamurthy wrote:
> Hi,
>
> I need to specify an initial value for for an AutoField. Is there a
> way of doing it?
You will need to manually tell the database to update its internal
counter. AutoField values are managed by the database
Hi,
I need to specify an initial value for for an AutoField. Is there a way of
doing it? Or can somebody refer me how to find the fields of classes like
AutoField?
Thanks,
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Is there some reason why I cannot have an AutoField(primary_key=False)
in my model? (In fact, documentation hints that I could, but manage.py
gives an assertion error from it.)
My pk is a charfield but I would also need an automatically
incrementing integer in the same class. Any ideas
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