When I test the function you offer 'self.id' returns 'None'
Le mer. 27 mai 2020 à 13:09, Akinfolarin Stephen <
akinfolarinsteph...@gmail.com> a écrit :
> i feel in your last session you are trying to concatenate a string and an
> integer use the int function to convert it to string then the number will
> show
>
> On Monday, May 25, 2020 at 5:48:29 AM UTC+14, Anselme SERI wrote:
>>
>> from django.db import models
>>>
>>>
>>> def codeid():
>>> lastid = MyModel.objects.last(id)
>>> autocode = ''
>>> if lastid == 0:
>>> autocode = 'BAC000000001'
>>> elif lastid != 0:
>>> if len(lastid) <= 8:
>>> lastid += 1
>>> autocode = 'D/BAC/00000000' + lastid
>>> elif 9 < len(lastid) <= 98:
>>> lastid += 1
>>> autocode = 'D/BAC/0000000' + lastid
>>> elif 99 < len(lastid) <= 998:
>>> lastid += 1
>>> autocode = 'D/BAC/000000' + lastid
>>> return autocode
>>>
>>>
>>> class MyModel(models.Model):
>>> libelle = models.CharField('Libellé', max_length=100)
>>> code = models.CharField(max_length=30, unique=True,
>>> auto_created=codeid())
>>>
>>> def __str__(self):
>>> return self.code
>>>
>>>
>> Hello,
>>
>> I try to to write a correct function for my model which generate a str
>> + incremental number according last id model.
>>
>> Pleaz help me.
>>
>>
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