Possibility to show created and modified in admin

[nemesifier]

Hi,

I would like to be able to show the fields "created" and "modified" in the admin form as readonly fields without too much boilerplate. I believe I'm not the only one doing this, maybe it would make sense to add it to this useful library.

This is the code I actually use:

from django.db import models
from django.utils.translation import ugettext_lazy as _
from django.contrib.admin import ModelAdmin

from model_utils.fields import AutoCreatedField, AutoLastModifiedField


class TimeStampedEditableModel(models.Model):
    """
    An abstract base class model that provides self-updating
    ``created`` and ``modified`` fields.
    """
    created = AutoCreatedField(_('created'), editable=True)
    modified = AutoLastModifiedField(_('modified'), editable=True)

    class Meta:
        abstract = True


class TimeStampedEditableAdmin(ModelAdmin):
    """
    ModelAdmin for TimeStampedEditableModel
    """
    def __init__(self, *args, **kwargs):
        self.readonly_fields += ('created', 'modified',)
        super(TimeStampedEditableAdmin, self).__init__(*args, **kwargs)

TimeStampedEditableAdmin automatically adds created and modified to the list of readonly fields at the bottom.

What do you think? If you like this idea I can send a PR.

[carljm]

Thanks for the idea. I'm not too excited about adding stuff like this, it's not that much code to do it yourself, and there are too many different ways someone might want this to work.