Django Round 2 Decimal

When working with Django, you might come across situations where you need to round decimal values to a specific number of decimal places. This can be achieved by using Python's round() function.

Rounding Decimal Fields in Django Models

If you have a decimal field in your Django model, you can easily round it to a specific number of decimal places before saving the value to the database.

from django.db import models

class MyModel(models.Model):
    decimal_field = models.DecimalField(decimal_places=2, max_digits=5)

    def save(self, *args, **kwargs):
        self.decimal_field = round(self.decimal_field, 2) # Round it to 2 decimal places
        super(MyModel, self).save(*args, **kwargs)

In the above code snippet, we are overriding the save() method of our model and rounding the decimal_field to 2 decimal places before saving.

Rounding Decimal Values in Django Views

If you need to round a decimal value in your Django view, you can use Python's round() function.

def my_view(request):
    decimal_value = 3.14159
    rounded_value = round(decimal_value, 2) # Round to 2 decimal places
    context = {'rounded_value': rounded_value}
    return render(request, 'my_template.html', context)

In the above code snippet, we are rounding a decimal value to 2 decimal places and passing it to the context for rendering in a template.

Conclusion

Rounding decimal values to a specific number of decimal places can be easily achieved in Django using Python's round() function. Whether you need to round values in your models or in your views, the round() function is a simple and effective way to do so.