I think I am already doing this!
Can you check my mail_item class please
On Tue, May 12, 2020, 11:17 AM Motaz Hejaze <trapper...@gmail.com> wrote:
> Access the country model through the foreign key in maiĺ_item , so you can
> get the country name and store it in mail_item_count
>
> On Tue, 12 May 2020, 12:37 pm hajar, <hajarben...@gmail.com> wrote:
>
>> can you explain to me more please
>>
>> Le mardi 12 mai 2020 10:01:24 UTC+1, Motaz Hejaze a écrit :
>>>
>>> In signal access the model of country through the foreignkey
>>> Pays.origin.country_name
>>>
>>> On Tue, 12 May 2020, 10:21 am Uri Kogan, <urk...@gmail.com> wrote:
>>>
>>>> I would suggest changing your *mail_item_count* model like this:
>>>>
>>>> class mail_item_count(models.Model):
>>>> country = models.ForeignKey(Pays, on_delete=models.CASCADE)
>>>> count = models.IntegerField(default=1)
>>>>
>>>>
>>>>
>>>> On Tuesday, May 12, 2020 at 10:53:57 AM UTC+3, hajar wrote:
>>>>>
>>>>> aht do you advice me to do ?
>>>>>
>>>>> Le mardi 12 mai 2020 08:32:04 UTC+1, Uri Kogan a écrit :
>>>>>>
>>>>>> From the error message it can be seen that mail_item_count has
>>>>>> "country" item which is "CharField".
>>>>>> But... the signal receiver sets this to instance of "Pays" object
>>>>>> which assumes it is "ForeignKey".
>>>>>>
>>>>>> On Tuesday, May 12, 2020 at 9:41:16 AM UTC+3, hajar wrote:
>>>>>>>
>>>>>>>
>>>>>>> class mail_item(models.Model):
>>>>>>> #mail_item_fid =
>>>>>>> models.OneToOneField(Mail_item_Event,on_delete=models.CASCADE)
>>>>>>> Event_cd = models.OneToOneField(Mail_item_Event,on_delete=models.
>>>>>>> CASCADE,related_name="mail_item_event_cd")
>>>>>>> office_Evt_cd = models.ForeignKey(Office,on_delete=models.CASCADE,
>>>>>>> related_name='office_Ev')
>>>>>>> Date_Evt = models.DateTimeField()
>>>>>>> Pays_origine = models.ForeignKey(Pays, on_delete=models.CASCADE ,
>>>>>>> related_name='paysOrigine')
>>>>>>> Pays_destination = models.ForeignKey(Pays,on_delete=models.
>>>>>>> CASCADE,related_name='paysDestination')
>>>>>>> Expediteur_id = models.ForeignKey(Client,on_delete=models.CASCADE
>>>>>>> ,related_name='expedi')
>>>>>>> Destinateur_id = models.ForeignKey(Client,on_delete=models.
>>>>>>> CASCADE,related_name='destin')
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> Le mardi 12 mai 2020 06:43:43 UTC+1, hajar a écrit :
>>>>>>>>
>>>>>>>> hello django users ,
>>>>>>>>
>>>>>>>> I am trying to update a class using signals , you will understand
>>>>>>>> once you see the code below
>>>>>>>>
>>>>>>>> class mail_item_count(models.Model):
>>>>>>>> country = models.CharField(max_length=100)
>>>>>>>> count = models.IntegerField(default=1)
>>>>>>>>
>>>>>>>>
>>>>>>>> def __str__(self):
>>>>>>>> return '{}, {}'.format(self.country,self.count)
>>>>>>>>
>>>>>>>> def sum(self):
>>>>>>>> a = sum(instance.count for instance in self.objects.all())
>>>>>>>>
>>>>>>>> return a
>>>>>>>>
>>>>>>>>
>>>>>>>> @receiver(post_save, sender=mail_item)
>>>>>>>> def update_count(sender, instance, created, **kwargs):
>>>>>>>> count_object,_ =
>>>>>>>> mail_item_count.objects.get_or_create(country=instance.Pays_origine)
>>>>>>>>
>>>>>>>> count_object.count = count_object.count + 1
>>>>>>>> count_object.save()
>>>>>>>>
>>>>>>>> but I am getting this error :
>>>>>>>>
>>>>>>>> *" Tried to update field dashboard.mail_item_count.country with a
>>>>>>>> model instance, <Pays: Maroc >. Use a value compatible with CharField.
>>>>>>>> "*
>>>>>>>>
>>>>>>>> can you help me out solving it
>>>>>>>>
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