Django: Why does this custom model field not behave as expected?

The following field is meant to format money as a two places decimal (quantized). You can see that it returns a `<decimal>.quantize(TWOPLACES)` version of the stored decimal. When I view this in the Django admin however, it doesn't do that. If I put in `50` to a field that is using `CurrencyField()` and view it in the admin, I get `50` vs `50.00`. Why is that? ``` from django.db import models from decimal import Decimal class CurrencyField(models.DecimalField): """ Only changes output into a quantized format. Everything else is the same. """ def __init__(self, *args, **kwargs): kwargs['max_digits'] = 8 kwargs['decimal_places'] = 2 super(CurrencyField, self).__init__(*args, **kwargs) def to_python(self, value): try: return super(CurrencyField, self).to_python(value).quantize(Decimal('0.01')) except AttributeError: return None ``` Update: I tried putting `return 'Hello World'` in place of `return super(CurrencyField, self).to_python(value).quantize(Decimal('0.01'))` and it didn't even show 'Hello World' in the shell. It put out `50` again. Does this mean that when I access an attribute of a model that is a `CurrencyField()` it doesn't call `to_python()`?