django-admin sum multiple columns

Question

I have a model with several fields. And I wanted to add another field in django-admin (list_display), where it is the sum of all fields.

Model's

class Model1(models.Model):
    field1 = models.DecimalField(blank=True,null=True,decimal_places=2,max_digits=8)
    field2 = models.DecimalField(blank=True,null=True,decimal_places=2,max_digits=8)
    field3 = models.DecimalField(blank=True,null=True,decimal_places=2,max_digits=8)
    field3 = models.DecimalField(blank=True,null=True,decimal_places=2,max_digits=8)
    field4 = models.DecimalField(blank=True,null=True,decimal_places=2,max_digits=8)


    def __str__(self):
        return str(self.id)

Model's Admin

class Model1Admin(admin.ModelAdmin):
    model = Model1

    list_display = ('field1','field2',<!--Sum of (field1,field2,field3,field4,field5-->)

admin.site.register(Modell,Model1Admin)

i am using the last version of django.

Answer 1

if you want you can do something like that:

1- Create a property in your model:

class Model1(models.Model):
    field1 = models.DecimalField(blank=True,null=True,decimal_places=2,max_digits=8)
    field2 = models.DecimalField(blank=True,null=True,decimal_places=2,max_digits=8)
    field3 = models.DecimalField(blank=True,null=True,decimal_places=2,max_digits=8)
    field3 = models.DecimalField(blank=True,null=True,decimal_places=2,max_digits=8)
    field4 = models.DecimalField(blank=True,null=True,decimal_places=2,max_digits=8)


    def __str__(self):
        return str(self.id)

    @property
    def final_sum(self):
        return self.field1 + self.field2 + self.field3 + self.field4 + self.field5

2- Then use it in your admin.py

class Model1Admin(admin.ModelAdmin):
    model = Model1

    list_display = ('final_sum', 'field1','field2', )

admin.site.register(Modell,Model1Admin)