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from base import *
from tag import Tag
class QuestionManager(models.Manager):
def create_new(self, title=None,author=None,added_at=None, wiki=False,tagnames=None,summary=None, text=None):
question = Question(
title = title,
author = author,
added_at = added_at,
last_activity_at = added_at,
last_activity_by = author,
wiki = wiki,
tagnames = tagnames,
html = text,
summary = summary
)
if question.wiki:
question.last_edited_by = question.author
question.last_edited_at = added_at
question.wikified_at = added_at
question.save()
from models import QuestionRevision
# create the first revision
QuestionRevision.objects.create(
question = question,
revision = 1,
title = question.title,
author = author,
revised_at = added_at,
tagnames = question.tagnames,
summary = CONST['default_version'],
text = text
)
return question
def update_tags(self, question, tagnames, user):
"""
Updates Tag associations for a question to match the given
tagname string.
Returns ``True`` if tag usage counts were updated as a result,
``False`` otherwise.
"""
current_tags = list(question.tags.all())
current_tagnames = set(t.name for t in current_tags)
updated_tagnames = set(t for t in tagnames.split(' ') if t)
modified_tags = []
removed_tags = [t for t in current_tags
if t.name not in updated_tagnames]
if removed_tags:
modified_tags.extend(removed_tags)
question.tags.remove(*removed_tags)
added_tagnames = updated_tagnames - current_tagnames
if added_tagnames:
added_tags = Tag.objects.get_or_create_multiple(added_tagnames,
user)
modified_tags.extend(added_tags)
question.tags.add(*added_tags)
if modified_tags:
Tag.objects.update_use_counts(modified_tags)
return True
return False
def update_answer_count(self, question):
"""
Executes an UPDATE query to update denormalised data with the
number of answers the given question has.
"""
# for some reasons, this Answer class failed to be imported,
# although we have imported all classes from models on top.
from models import Answer
self.filter(id=question.id).update(
answer_count=Answer.objects.get_answers_from_question(question).filter(deleted=False).count())
def update_view_count(self, question):
"""
update counter+1 when user browse question page
"""
self.filter(id=question.id).update(view_count = question.view_count + 1)
def update_favorite_count(self, question):
"""
update favourite_count for given question
"""
from models import FavoriteQuestion
self.filter(id=question.id).update(favourite_count = FavoriteQuestion.objects.filter(question=question).count())
def get_similar_questions(self, question):
"""
Get 10 similar questions for given one.
This will search the same tag list for give question(by exactly same string) first.
Questions with the individual tags will be added to list if above questions are not full.
"""
#print datetime.datetime.now()
questions = list(self.filter(tagnames = question.tagnames, deleted=False).all())
tags_list = question.tags.all()
for tag in tags_list:
extend_questions = self.filter(tags__id = tag.id, deleted=False)[:50]
for item in extend_questions:
if item not in questions and len(questions) < 10:
questions.append(item)
#print datetime.datetime.now()
return questions
class Question(Content, DeletableContent):
title = models.CharField(max_length=300)
tags = models.ManyToManyField('Tag', related_name='questions')
answer_accepted = models.BooleanField(default=False)
closed = models.BooleanField(default=False)
closed_by = models.ForeignKey(User, null=True, blank=True, related_name='closed_questions')
closed_at = models.DateTimeField(null=True, blank=True)
close_reason = models.SmallIntegerField(choices=CLOSE_REASONS, null=True, blank=True)
followed_by = models.ManyToManyField(User, related_name='followed_questions')
# Denormalised data
answer_count = models.PositiveIntegerField(default=0)
view_count = models.PositiveIntegerField(default=0)
favourite_count = models.PositiveIntegerField(default=0)
last_activity_at = models.DateTimeField(default=datetime.datetime.now)
last_activity_by = models.ForeignKey(User, related_name='last_active_in_questions')
tagnames = models.CharField(max_length=125)
summary = models.CharField(max_length=180)
objects = QuestionManager()
class Meta(Content.Meta):
db_table = u'question'
def delete(self):
super(Question, self).delete()
try:
ping_google()
except Exception:
logging.debug('problem pinging google did you register you sitemap with google?')
def save(self, **kwargs):
"""
Overridden to manually manage addition of tags when the object
is first saved.
This is required as we're using ``tagnames`` as the sole means of
adding and editing tags.
"""
initial_addition = (self.id is None)
super(Question, self).save(**kwargs)
if initial_addition:
tags = Tag.objects.get_or_create_multiple(self.tagname_list(),
self.author)
self.tags.add(*tags)
Tag.objects.update_use_counts(tags)
def tagname_list(self):
"""Creates a list of Tag names from the ``tagnames`` attribute."""
return [name for name in self.tagnames.split(u' ')]
def tagname_meta_generator(self):
return u','.join([unicode(tag) for tag in self.tagname_list()])
def get_absolute_url(self):
return '%s%s' % (reverse('question', args=[self.id]), django_urlquote(slugify(self.title)))
def has_favorite_by_user(self, user):
if not user.is_authenticated():
return False
from models import FavoriteQuestion
return FavoriteQuestion.objects.filter(question=self, user=user).count() > 0
def get_answer_count_by_user(self, user_id):
from models import Answer
query_set = Answer.objects.filter(author__id=user_id)
return query_set.filter(question=self).count()
def get_question_title(self):
if self.closed:
attr = CONST['closed']
elif self.deleted:
attr = CONST['deleted']
else:
attr = None
if attr is not None:
return u'%s %s' % (self.title, attr)
else:
return self.title
def get_revision_url(self):
return reverse('question_revisions', args=[self.id])
def get_latest_revision(self):
return self.revisions.all()[0]
def get_last_update_info(self):
when, who = self.post_get_last_update_info()
answers = self.answers.all()
if len(answers) > 0:
for a in answers:
a_when, a_who = a.post_get_last_update_info()
if a_when > when:
when = a_when
who = a_who
return when, who
def get_update_summary(self,last_reported_at=None,recipient_email=''):
edited = False
if self.last_edited_at and self.last_edited_at > last_reported_at:
if self.last_edited_by.email != recipient_email:
edited = True
comments = []
for comment in self.comments.all():
if comment.added_at > last_reported_at and comment.user.email != recipient_email:
comments.append(comment)
new_answers = []
answer_comments = []
modified_answers = []
commented_answers = []
import sets
commented_answers = sets.Set([])
for answer in self.answers.all():
if (answer.added_at > last_reported_at and answer.author.email != recipient_email):
new_answers.append(answer)
if (answer.last_edited_at
and answer.last_edited_at > last_reported_at
and answer.last_edited_by.email != recipient_email):
modified_answers.append(answer)
for comment in answer.comments.all():
if comment.added_at > last_reported_at and comment.user.email != recipient_email:
commented_answers.add(answer)
answer_comments.append(comment)
#create the report
if edited or new_answers or modified_answers or answer_comments:
out = []
if edited:
out.append(_('%(author)s modified the question') % {'author':self.last_edited_by.username})
if new_answers:
names = sets.Set(map(lambda x: x.author.username,new_answers))
people = ', '.join(names)
out.append(_('%(people)s posted %(new_answer_count)s new answers') \
% {'new_answer_count':len(new_answers),'people':people})
if comments:
names = sets.Set(map(lambda x: x.user.username,comments))
people = ', '.join(names)
out.append(_('%(people)s commented the question') % {'people':people})
if answer_comments:
names = sets.Set(map(lambda x: x.user.username,answer_comments))
people = ', '.join(names)
if len(commented_answers) > 1:
out.append(_('%(people)s commented answers') % {'people':people})
else:
out.append(_('%(people)s commented an answer') % {'people':people})
url = settings.APP_URL + self.get_absolute_url()
retval = '<a href="%s">%s</a>:<br>\n' % (url,self.title)
out = map(lambda x: '<li>' + x + '</li>',out)
retval += '<ul>' + '\n'.join(out) + '</ul><br>\n'
return retval
else:
return None
def __unicode__(self):
return self.title
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