In windows powershell:
ERRORS:
<class 'polls.admin.QuestionAdmin'>: (admin.E108) The value of
'list_display[0]' refers to 'question_text', which is not a callable, an
attribute of 'QuestionAdmin', or an attribute or method on 'polls.Question'.
<class 'polls.admin.QuestionAdmin'>: (admin.E108) The value of
'list_display[1]' refers to 'pub_date', which is not a callable, an
attribute of 'QuestionAdmin', or an attribute or method on 'polls.Question'.
<class 'polls.admin.QuestionAdmin'>: (admin.E116) The value of
'list_filter[0]' refers to 'pub_date', which does not refer to a Field.
System check identified 3 issues (0 silenced).
polls\models.py:
import datetime
from django.db import models
from django.utils import timezone
class Question(models.Model):
#...
def was_published_recently(self):
now = timezone.now()
return now - datetime.timedelta(days=1) <= self.pub_date <= now
was_published_recently.admin_order_field = 'pub_date'
was_published_recently.boolean = True
was_published_recently.short_description = 'published recently?'
class Choice(models.Model):
#...
def __str__(self):
return self.choice_text
question = models.ForeignKey(Question, on_delete=models.CASCADE)
choice_text = models.CharField(max_length=200)
votes = models.IntegerField(default=0)
polls\admin.py:
from django.contrib import admin
from . models import Choice, Question
class ChoiceInline(admin.TabularInline):
model = Choice
extra = 3
class QuestionAdmin(admin.ModelAdmin):
fieldsets = [
(None, {'fields': ['question_text']}),
('Date information',{'fields': ['pub_date'], 'classes':
['collapse']}),
]
inlines = [ChoiceInline]
list_display = ('question_text', 'pub_date', 'was_published_recently')
list_filter = ['pub_date']
admin.site.register(Question, QuestionAdmin)
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