DecimalField in admin can show up as Scientific Notation

[Eric]

In the django admin, if a DecimalField's value is lower than 0.000001 displays as Scientific Notation (ex: 1E-7) since python Decimals converts automatically to a scientific notation (exponential) ex: Decimal("0.0000001") = Decimal('1E-7')

this is mostly visible when using Postgresql since DecimalFields with a value of 0 are saved with the decimal precision higher than 6 , ex: 0.00000000 then in the admin instead of seeing 0 or 0.00000000 it is displayed as 0E-8

the bug can be fixed by converting the Decimal to a fixed point value in django.utils.numberformat.format:

link to my branch: ​https://github.com/xblitz/django/tree/ticket_23935

[Tim Graham <timograham@…>]

In 9d1a69579b996eaa208f141b409141be63f597ec:

Fixed #23935 -- Converted decimals to fixed point in utils.numberformat.format

[Collin Anderson]

I'm using a custom "Money" subclass of DecimalField that automatically adds a dollar sign when displaying. It works fine on 1.7 but now it doesn't work.

Is it too late possibly change this? We could move this to a {{ value|decimalformat }} filter, or we could do {{ |stringformat:"F" }}

If the ship has already sailed, that's ok too. I can always find a different way to do it.

[Collin Anderson]

On 1.7 the template renders the string "$27.98", but on 1.8 it's "27.98".

My Money() subclass overrides str/unicode.

[Tim Graham]

I don't see how this low-level fix would translate to using a template filter (e.g. in form inputs)? Nor do I understand your code well enough to understand how this fix broke it. If you had a test or even a snippet to demonstrate the change in behavior, that would be helpful.

[Collin Anderson]

Ok, here's a rough failing test case demonstrating my issue:
​https://github.com/django/django/pull/3921