On Sep 20, 11:54 am, Julian <maili...@julianmoritz.de> wrote:
> Hi,
>
> I want to display a customized table for a model in the admin. I've
> just written a customized filter, which works very well.
>
> The problem: My model has a field 'timestamp' which is a
> datetimefield. It may be null, so in the admin it's displayed as
> '(None)'. I want to replace '(None)' with 'All'. The problems:
>
> - In change_list.html the table is not generated. It's generated in
> change_list_results.html. Well, the first one may be put in myapp/
> templates/myapp/mymodel/ and overwrites the default one. The latter
> one not.
> - So I have to write a custom template tag, which uses 'admin/
> templatetags/admin_list/result_list', just to tell it which custom
> template to use.
> - Then I realize that the whole
>
> <td class="nowrap">(None)</td>
>
> is NOT generated in a template but anywhere deep down in some python
> code. It's not that there's a
>
> {% if not result.value %}
> <td class="nowrap">(None)</td>
> {% endif %}
>
> which I could replace with
>
> {% if not result.value %}
> <td class="nowrap">All</td>
> {% endif %}
>
> (or similar), but it seems I have to write my own customized
> items_for_result-function, which just replaces with the
> EMPTY_CHANGELIST_VALUE (it's '(None)') with 'All'.
>
> so now my final question: Isn't there an easy, not-hurting way to
> solve my problem?
Instead of specifying the field name in `list_display`, specify the
name of a custom method on your ModelAdmin subclass. Then define that
method to return the format you want:
list_display = ('name', 'my_custom_timestamp')
def my_custom_timestamp(self, obj):
if obj.timestamp is None:
return 'All'
else:
return obj.timestamp
--
DR.
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