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POStrange Django-admin behaviour
 

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  1. POStrange Django-admin behaviour
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    <p>I met very strange django admin site behaviour.<br> here is my <code>admin.py</code>: </p> <pre><code>from django.contrib import admin from pastebin.models import Paste from datetime import date class ExpiredListFilter(admin.SimpleListFilter): title = u"Expiration" parameter_name = "expiration_date" def lookups(self, request, model_admin): return ( ('yes', u'expired'), ('no', u'actual'), ) def queryset(self, request, queryset): if self.value == 'yes': return queryset.filter(expiration_date__lt=date.today()) if self.value == 'no': return queryset.filter(expiration_date__gte=date.today()) class AuthExpiredListFilter(ExpiredListFilter): def lookups(self, request, model_admin): if request.user.is_superuser: return super(AuthExpiredListFilter, self).lookups(request, model_admin) def queryset(self, request, queryset): if request.user.is_superuser: return super(AuthExpiredListFilter, self).queryset(request, queryset) class PasteAdmin(admin.ModelAdmin): date_hierarchy = "created_at" fields = ('author', 'title', 'content', 'syntax', 'expiration_date') list_display = ('title', 'author', 'syntax', 'is_expired') list_display_links = ('title',) list_filter = (AuthExpiredListFilter,) admin.site.register(Paste, PasteAdmin) </code></pre> <p>I'm just trying to create my own Filter. Application is about creating pastes... similar to pastebin. so every paste has it's expiration date. But admin site doesn't show me expired pastes. I can see it in the shell by calling <code>objects.all()</code> or by direct lookup <code>objects.get(pk=)</code>.<br> Here is my <code>model.py</code>: </p> <pre><code>from django.db import models from django.contrib.auth.models import User from datetime import date, datetime, timedelta class ExpQuerySet(models.query.QuerySet): ''' QuerySet for administrative purpose only. Gives access to expired Pastes to archive and delete them ''' def actual(self): return self.filter(expiration_date__gte=date.today()) def expired(self): return self.filter(expiration_date__lt=date.today()) class ActualExpiredManager(models.Manager): ''' Class to manage ExpQuerySet. Gives access to it's actual() and expired() methods. ''' def get_query_set(self): return ExpQuerySet(self.model) def __getattr__(self, attr, *args): if attr.startswith("_") or attr.startswith("__"): raise AttributeError return getattr(self.get_query_set(), attr, *args) class ActualManager(models.Manager): ''' Actual manager to work with. Returns a QuerySet of actual Pastes. ''' def get_query_set(self): return ExpQuerySet(self.model).actual() def __getattr__(self, attr, *args): if attr.startswith("_") or attr.startswith("__"): raise AttributeError return getattr(self.get_query_set(), attr, *args) class Paste(models.Model): SYNTAX_CHOICES = ( ('txt', u'Text'), ('py', u'Python'), ('js', u'JavaScript'), ('rb', u'Ruby'), ('pl', u'Perl'), ('asp', u'ASP.NET'), ('java', u'Java'), ) title = models.CharField(max_length=100, blank=True, verbose_name=u"Paste's Title") author = models.ForeignKey(User, null=True, verbose_name=u"Paste's Author") content = models.TextField() syntax = models.CharField(max_length=5, choices=SYNTAX_CHOICES, default='txt') created_at = models.DateTimeField(auto_now_add=True, verbose_name=u"Was created at") modified_at = models.DateTimeField(auto_now=True, verbose_name=u"Was modified at") expiration_date = models.DateField(verbose_name=u"Date to expire") _objects = ActualManager() # it was objects.. I thought this is a cause of a problem so I've added underscore and simple Manager act_exp = ActualExpiredManager() objects = models.Manager() def __unicode__(self): return self.title def save(self, *args, **kwargs): if len(self.title) == 0: self.title = u"Untitled Post" super(Paste, self).save(*args, **kwargs) class Meta: ordering=['-created_at'] def was_modified(self): r_range = self.created_at + timedelta(minutes=2) if self.modified_at &lt; r_range: return False return True was_modified.short_description = "Was modified" was_modified.boolean = True def is_expired(self): if self.expiration_date &lt; date.today(): return True return False is_expired.short_description = "Is expired" is_expired.boolean = True </code></pre> <p>Where did I make a mistake?<br> <img src="https://i.stack.imgur.com/Bqg9D.png" alt="django error screenshot"> it cannot get paste with id=6<br> <img src="https://i.stack.imgur.com/oShCR.png" alt="console screenshot"> everything is ok<br> Thanx in advance. Maybe someone will show my mistake.</p>
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