Model - def __unicode__(self) - doesn't work

[Przemek Ciborowski]

Hello guys,

I'm really beginner in django.

I have extremely simple example:

class Vlan(models.Model):

    name = models.CharField(max_length=30, name='Vlan name')

    number = models.IntegerField(default=0, name='Vlan number')

    def __unicode__(self):

        return self.name

When I'm trying to use admin interface, I got this error:

AttributeError at /admin/networks/vlan/add/

'Vlan' object has no attribute 'name'

Request Method:	POST
Request URL:	http://127.0.0.1:8000/admin/networks/vlan/add/
Django Version:	1.6.6
Exception Type:	AttributeError
Exception Value:	'Vlan' object has no attribute 'name'
Exception Location:	D:\Scripts\Mercury\networks\models.py in __str__, line 10
Python Executable:	C:\Python\Main\Scripts\python.exe
Python Version:	2.7.8

I'm sure that it was working a few days ago. And in meantime I did django upgrade.

What I'm doing wrong, and how I can fix it?

Thanks in advance.

Przemek.

[Babatunde Akinyanmi]

Hi Przemek,
I'm not sure there's a name attribute for Field and its subclasses.
Does removing the name attribute work?

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[Mario Gudelj]

Your problem is in the add view. Post your view code

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[monoBOT]

Be sure to returm a unicode object like this:

    def __unicode__(self):

        return u"%s" % self.name

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[Przemek Ciborowski]

Hi, thanks for your reply.

I forgot to mention that this problem occurs with admin interface.

Regards

Przemek.

[Przemek Ciborowski]

Hi, thanks for your reply.

It didn't help, I also trid return unicode(self.name)

Regards

Przemek.

[Przemek Ciborowski]

So to be more clearly, let create new django project with one application for example with name networks.

Add those lines to the networks/models.py:

class Vlan(models.Model):

    name = models.CharField(max_length=30, name='Vlan name')

    def __unicode__(self):

        return self.name

add those two lines to networks/admin.py

from .models import *

admin.site.register(Vlan)

It should be (and was) enough to run admin interface. Unfortunately when I'm trying to add new vlan or list current vlans I get:

-------------------

AttributeError at /admin/networks/vlan/add/

'Vlan' object has no attribute 'name'

Request Method:	POST
Request URL:	http://127.0.0.1:8000/admin/networks/vlan/add/
Django Version:	1.6.6
Exception Type:	AttributeError
Exception Value:	'Vlan' object has no attribute 'name'

Exception Location:	C:\Scripts\Test1\networks\models.py in __unicode__, line 11

Python Executable:	C:\Python\Main\Scripts\python.exe
Python Version:	2.7.8

Python Path:	['C:\\Scripts\\Test1', 'C:\\Scripts\\Test1', 'C:\\Windows\\SYSTEM32\\python27.zip', 'C:\\Python\\Main\\DLLs', 'C:\\Python\\Main\\lib', 'C:\\Python\\Main\\lib\\plat-win', 'C:\\Python\\Main\\lib\\lib-tk', 'C:\\Python\\Main\\Scripts', 'C:\\Python27\\Lib', 'C:\\Python27\\DLLs', 'C:\\Python27\\Lib\\lib-tk', 'C:\\Python\\Main', 'C:\\Python\\Main\\lib\\site-packages']
Server time:	Tue, 26 Aug 2014 14:12:06 +0200

-----------------------

More information here : http://dpaste.com/26QQPKZ

Look this is code from first part of official django tutorial.

When I delete def __unicode__(self) method from models file, it works fine but in vlan list I get Vlan object, Vlan object.... etc instead of names.

Regards

Przemek.

[James Schneider]

Try changing the 'name' argument to 'verbose_name' like so:

name = models.CharField(max_length=30, verbose_name='Vlan name')

I don't believe model fields accept 'name' as a keyword arg. This would also explain the slightly confusing error due to the overlap of 'name' appearing in multiple spots.

https://docs.djangoproject.com/en/dev/ref/models/fields/#field-options

-James

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[Babatunde Akinyanmi]

On 26 Aug 2014 14:38, "James Schneider" <jrschn...@gmail.com> wrote:
>
> Try changing the 'name' argument to 'verbose_name' like so:
>
> name = models.CharField(max_length=30, verbose_name='Vlan name')
>
> I don't believe model fields accept 'name' as a keyword arg.
This would also explain the slightly confusing error due to the overlap of 'name' appearing in multiple spots.
>

Just like I pointed out in my earlier mail. Remove the name argument or change it to verbose_name as recommended by James

> To view this discussion on the web visit https://groups.google.com/d/msgid/django-users/CA%2Be%2BciWRN00qpz1SRvzgC_k0av92MQyPsN0TSU1CBdBh-QFbWw%40mail.gmail.com.

[Babatunde Akinyanmi]

On 25 Aug 2014 23:32, "Babatunde Akinyanmi" <tunde...@gmail.com> wrote:
>
> Hi Przemek,
> I'm not sure there's a name attribute for Field and its subclasses.
> Does removing the name attribute work?
>

Oops. I meant argument not attribute

[Przemek Ciborowski]

Thank you a lot!

James & Tundebabzy - Thanks:)

It was the mistake.

Regards

Przemek

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[Tom Evans]

On Tue, Aug 26, 2014 at 12:22 PM, Przemek Ciborowski <cib...@gmail.com> wrote:
>
> So to be more clearly, let create new django project with one application for example with name networks.
> Add those lines to the networks/models.py:
>
> class Vlan(models.Model):
>
> name = models.CharField(max_length=30, name='Vlan name')

"name" is not an argument for CharField - do you mean verbose_name?

I suspect this error causes Vlan.name to not be defined.

Cheers

Tom