CODEWITHSUNDEEP
pythondjangodjango-modelsdjango-views
smack
smack

Reputation: 950

Update model field and any other fields in django

Is it possible to update a field and when saving it, it should save other fields with new changes.

For example, I have the below model,

class Backup(models.Model):
    user=models.ForeignKey(User)
    title=models.CharField(max_length=200)
    is_approve=models.BooleanField(default=False)
    is_bad=models.BooleanField(default=False)
    country=models.CharField(max_length=100)

Now, my main aim is to just make is_approve field True. My secondary aim is to update other fields alongside the is_approve field, incase the user makes changes before clicking on the approve button in template.

    @staff_member_required
    def activate_moderation(request, backup_id=None):
        if id:
           vpostmod=get_object_or_404(Backup, id=backup_id)
           vpostmod.is_approve =1
           vpostmod.save()

How can I plug in instances of all fields alongside with the save(), in order to make the changes after setting is_approve to True.

UPDATE TO DANIEL'S QUESTION

The model has a 'Backup' ModelForm. The forms are rendered via Django admin (BackupAdmin) using the same 'backup' modelform.

I passed my button link by invoking the change_form place in my admin/app_name/modelname/ folder. 

    def render_change_form(self, request, context, *args, **kwargs):
        backup= self.get_object(request, self.backup_id)
        context.update({'backup':backup})
        return super(BackupAdmin, self).render_change_form(request, context, *args, **kwargs)

And the change form template is like this:

  {% block submit_buttons_bottom %}
        <div class="submit-row">
         {% if backup.is_approve %} 
            <p>pass</p>
         {% else %}
           <a href="{% url 'activate_moderation' backup.id %}" class="historylink"> <input type="button" value="{% trans 'Approve' %}" name="_approvebutton" /></a>
           <input type="button" value="{% trans 'Reject' %}" name="_rejectbutton" />
          {% endif %}
        </div>
{{ block.super }}
{% endblock %}

Upvotes: 0

Views: 314

Answers (1)

dani herrera
dani herrera

Reputation: 51715

Do you have several options.

First one is to overwrite save method on Backup model:

#Backup
def save(self, *args, **kwargs):
    if self.pk:
        previous_Backup = Backup.objects.get(self.pk).is_approve
    super(Backup, self).save(*args, **kwargs)
    if self.pk and self.is_approve != previous_Backup:
        #make changes

Second one is binding function to post save signal + django model utils field tracker:

@receiver(post_save, sender=Backup)
def create_change_backup(sender,instance, signal, created, **kwargs):
    if created:
        previous_Backup = get it from django model utils field tracker
        #make changes

Upvotes: 1

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