DateTimeField doesn't show in admin system

Question

How come my \"date\" field doesn\'t come up in the admin system?

In my admin.py file i have

from django.contrib import admin
from glasses.players.mod         


        

Answer 1

It might have to do with the auto_now_add being true. Perhaps instead of that parameter to capture the date on add, you could override the model save method to insert the datetime when the id is null.

class Rating(models.Model):

    ....
    def save(self, *args, **kwargs)
        if not self.id: 
            self.date = datetime.datetime.now()

Answer 2

If you want any field to be visible in the list of all your entries (when you click on a model in the admin people) and not when you open that particular entry then -

class RatingAdmin(admin.ModelAdmin):
    list_display = ('name', 'date') 

admin.site.register(Rating, RatingAdmin)

'name' being your main field or any other field you want to display in the admin panel.

This way you can specify all the columns you want to see.

Answer 3

I believe to reason lies with the auto_now_add field.

From this answer:

Any field with the auto_now attribute set will also inherit editable=False and therefore will not show up in the admin panel.

Also mentioned in the docs:

As currently implemented, setting auto_now or auto_now_add to True will cause the field to have editable=False and blank=True set.

This does make sense, since there is no reason to have the field editable if it's going to be overwritten with the current datetime when the object is saved.

Answer 4

If you really want to see date in the admin panel, you can add readonly_fields in admin.py:

class RatingAdmin(admin.ModelAdmin):
    readonly_fields = ('date',)

admin.site.register(Rating,RatingAdmin)

Any field you specify will be added last after the editable fields. To control the order you can use the fields options.

Additional information is available from the Django docs.

Answer 5

You can not do that, check the documentation

auto_now and auto_now_add are all non-editable fields and you can not override them...

Answer 6

Depending on your specific needs, and any nuances in difference in behavior, you could do the following:

from django.utils.timezone import now

class MyModel(models.Model):
    date = models.DateTimeField(default=now)

The default field can be used this way: https://docs.djangoproject.com/en/dev/ref/models/fields/#default

The default value for the field. This can be a value or a callable object. If callable it will be called every time a new object is created.

This does not set editable to False