Glavni problem je u tome što Django ne obrađuje pravilno polje datuma automatskog ažuriranja. Ako pokušate ažurirati polje datuma pomoću administratorskog sučelja, Django će automatski ažurirati sva polja u tablici s istim imenom, uključujući polje datuma automatskog ažuriranja. To može dovesti do neočekivanih i potencijalno netočnih promjena vaših podataka.
I have a model with a date field. I want to automatically update the date field when an object is created or edited in the admin panel. How can I do this?
A:
You can override <code>save_model</code> method of your admin class and set the value of <code>date</code> field to <code>datetime.now()</code>.
<blockquote>
<p><strong><a href="https://docs.djangoproject.com/en/2.1/ref/contrib/admin/#django.contrib.admin.ModelAdmin" rel="nofollow noreferrer">ModelAdmin</a></strong></p>
<p><strong><a href="https://docs.djangoproject.com/en/2.1/ref/contrib/admin/#django-contrib-admin-options-modeladmin-save_model" rel="nofollow noreferrer">save_model()</a></strong></p>
<p>[...] This method should save the object and return the new instance.</p>
</blockquote>
Example:
<code>class MyModelAdmin(admin, ModelAdmin):
def save_model(self, request, obj, form, change):
if not change: # obj is being created for first time (i e., it's new)
obj = super().save_model(request, obj, form, change) # create object first
# now set your custom values here...
obj = super().save_model(request, obj, form=form._meta['fields'], change=change) # update object with custom values
else: # existing object is being edited (i e., it's not new)
# now set your custom values here...
obj = super().save_model(request, obj=obj._meta['fields'], form=form._meta['fields'], change=change) # update object with custom values
return obj
</code>
Što je polje za automatsko ažuriranje
Polje "Automatsko ažuriranje" je booleovo polje u tablici "postavki" Django projekta. Kada je postavljen na True, Django će automatski provjeriti ima li ažuriranja datoteka postavki projekta i, ako se pronađu nove postavke, ažurirat će datoteke postavki projekta.
