I need will create two sortable fields in Django admin by values in Though-Model.
-----------------
My models.py
----------------
from django.core.urlresolvers import reverse
from django.utils.translation import ugettext_lazy as _
from django.db import models
from django.conf import settings
from autoslug import AutoSlugField
from mylabour.models import TimeStampedModel
from mylabour.utils import CHOICES_LEXERS
class Snippet(TimeStampedModel):
"""
"""
title = models.CharField(_('Title'), max_length=200)
slug_title = AutoSlugField(populate_from='title', unique_with='author', always_update=True, sep='__')
description = models.TextField(_('Decription'))
code = models.TextField(_('Code'))
# tags
lexer = models.CharField(_('Lexer of code'), max_length=50, choices=CHOICES_LEXERS)
author = models.ForeignKey(
settings.AUTH_USER_MODEL,
verbose_name=_('Author'),
related_name='snippets',
on_delete=models.DO_NOTHING,
)
voted_users = models.ManyToManyField(
settings.AUTH_USER_MODEL,
verbose_name=_('Voted users'),
related_name='voted_users',
through='VoteUserInSnippet',
through_fields=('snippet', 'user'),
)
class Meta:
db_table = 'snippet'
verbose_name = _("Snippet")
verbose_name_plural = _("Snippets")
get_latest_by = 'date_created'
ordering = ['date_created']
def __str__(self):
return '{0.title}'.format(self)
def get_absolute_url(self):
return reverse('app_snippets:snippet', kwargs={'slug_title': self.slug_title})
class VoteUserInSnippet(models.Model):
user = models.ForeignKey(
settings.AUTH_USER_MODEL,
on_delete=models.CASCADE,
verbose_name='User',
limit_choices_to={'is_active': True},
)
snippet = models.ForeignKey('Snippet', on_delete=models.CASCADE, verbose_name='Snippet')
is_useful = models.BooleanField(_('Is useful'))
date_voting = models.DateTimeField(_('Date voting'), auto_now_add=True)
def __str__(self):
return _('User "{0.user}" found this snippet as {0.is_useful}').format(self)
class SnippetComment(TimeStampedModel):
text_comment = models.TextField(_('Text comment'))
snippet = models.ForeignKey('Snippet', related_name='comments', verbose_name=_('Snippet'), on_delete=models.CASCADE)
author = models.ForeignKey(
settings.AUTH_USER_MODEL,
related_name='comments_snippet',
verbose_name=_('Author'),
on_delete=models.DO_NOTHING,
)
class Meta:
db_table = 'snippet_comment'
verbose_name = "Comment of snippet"
verbose_name_plural = "Comments of snippet"
get_latest_by = 'date_created'
ordering = ['snippet', 'date_created']
def __str__(self):
return _('Comment from "{0.author}" on snippet "{0.snippet}"').format(self)
-----------
My admin.py
-----------
from django.db.models import Count
from django.utils.translation import ugettext_lazy as _
from django.contrib import admin
from .models import *
class SnippetCommentInline(admin.StackedInline):
'''
Stacked Inline View for SnippetComment
'''
model = SnippetComment
min_num = 0
max_num = None
extra = 1
fk_name = 'snippet'
class VoteUserInSnippetInline(admin.TabularInline):
'''
Stacked Inline View for VoteUserInSnippet
'''
model = VoteUserInSnippet
min_num = 0
max_num = None
extra = 1
class SnippetAdmin(admin.ModelAdmin):
'''
Admin View for Snippet
'''
list_display = (
'title',
'author',
'lexer',
'get_count_good_reply',
'get_count_bad_reply',
'get_count_replies',
'is_new',
'date_modified',
'date_created',
)
list_filter = (
('author', admin.RelatedOnlyFieldListFilter),
'lexer',
'date_modified',
'date_created',
)
inlines = [
SnippetCommentInline,
VoteUserInSnippetInline,
]
search_fields = ('title',)
def get_queryset(self, request):
qs = super(SnippetAdmin, self).get_queryset(request)
qs = qs.annotate(
count_comments=Count('comments', distinct=True),
count_voted_users=Count('voted_users', distinct=True),
)
return qs
def get_count_comments(self, obj):
return obj.count_comments
get_count_comments.admin_order_field = 'count_comments'
get_count_comments.short_order = _('Count comments')
def get_count_good_replies(self, obj):
return VoteUserInSnippet.objects.filter(snippet=obj, is_useful=True).count()
# get_count_good_replies.admin_order_field = ''
get_count_good_replies.short_order = _('Count good replies')
def get_count_bad_replies(self, obj):
return VoteUserInSnippet.objects.filter(snippet=obj, is_useful=False).count()
# get_count_bad_replies.admin_order_field = ''
get_count_bad_replies.short_order = _('Count bad replies')
def get_count_replies(self, obj):
return obj.count_voted_users
get_count_replies.admin_order_field = 'count_voted_users'
get_count_replies.short_order = _('Count replies')
class VoteUserInSnippetAdmin(admin.ModelAdmin):
'''
Admin View for VoteUserInSnippet
'''
list_display = ('snippet', 'user', 'is_useful', 'date_voting')
list_filter = (
('user', admin.RelatedOnlyFieldListFilter),
('snippet', admin.RelatedOnlyFieldListFilter),
'is_useful',
'date_voting',
)
class SnippetCommentAdmin(admin.ModelAdmin):
'''
Admin View for SnippetComment
'''
list_display = ('snippet', 'author', 'is_new', 'date_modified', 'date_created')
list_filter = (
('author', admin.RelatedOnlyFieldListFilter),
('snippet', admin.RelatedOnlyFieldListFilter),
'date_modified',
'date_created',
)
Methods get_count_bad_replies() and get_count_bad_replies() right worked but is not sortable.
May be who known have resolve this problem.
Thanks.
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