NumericListfilter or similar

[Omer Korner]

This is a proposal for a new ListFilter subclass.

Currently, if you add a numeric field to list_filter, Django admin outputs all possible values of that field using AllValuesFieldListFilter. This can get ugly very quickly.

For example, in my case, I have an application that manages transactions (orders) from an ecommerce site, and saves the transaction value. I can't easily filter the values (hundreds of thousands of them).

I have two suggestions for a replacement, instead of outputting all available values for a numeric field:

1. Output something similar to what DateFieldListFilter does, eg. "10 or less/more, 15 or less" and so on, depending on real values. 
   
   
   
   
2. A numeric input. These an be two inputs for a range, or a single input for a specific value. Looking at the ListFilter code, this would be a much more complex change.

Happy to hear your thoughts.

[John Griebel]

I agree that we need a replacement; the current behaviour isn't all that useful, IMHO. My vote would for choice #2, after all it seems more natural (to me, at least), to think of numbers as a range, especially while searching. Option 1 seems less intuitive for a situation like this.

+1 from me, especially if we were to go with option 2.

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[Tim Graham]

Does it need to be in Django itself? I'd think probably not, at least to start, but if there's something prohibiting that, then let us know.

[Omer Korner]

Released as a plugin:

https://github.com/jbkkd/django-numericfieldlistfilter

[Cristiano Coelho]

Implementing a custom filter with an arbitrary text input is quite easy. All you need is a template and subclass of ListFilter. However I agree that it could be great that it comes already as an option by django since ListFilter and FieldFilter are usually not enough.