def unmerge_topic_action(user_id, topic_id, comment=''):
""" return topic_id(int) if succeed, return error message if failed"""
topic = Topic.objects.get(pk=topic_id)
merged_to_id = topic.merged_to_id
if topic:
if topic.locked or topic.deleted:
return '此话题已被锁定或被删除'
elif topic.merged_to_id:
topic.merged_to_id = None
topic.save()
#Note: If topic A is merged to me, me is merged to topic B, then A is merged to B
#Now me unmerges from B, but let A stay merged to B
item_topic_set = Item_Topic.objects.filter(topic_merged_from__id=topic_id)
if item_topic_set:
for item_topic in item_topic_set:
item_topic.topic_id = item_topic.topic_merged_from_id
item_topic.topic_merged_from_id = None
item_topic.save()
topic_parent_set = Topic_Parent.objects.filter(parent_merged_from__id=topic_id)
if topic_parent_set:
for topic_parent in topic_parent_set:
topic_parent.parent_id = topic_parent.parent_merged_from_id
topic_parent.parent_merged_from_id = None
topic_parent.save()
refs = Topic_Revision.objects.filter(topic__id=topic_id, operation='m').order_by('-pk')
if refs:
reference = refs[0]
if reference.user_id != user_id:
notification = Notification(operation='um')
notification.user_id = reference.user_id
notification.related_user_id = user_id
notification.topic_id = topic_id
notification.incr_count_in_profile()
notification.save()
update_user_topic_fame(topic_id, user_id, reference.user_id)
else:
reference = None
update_user_topic_fame(topic_id, user_id)
topic_revision = Topic_Revision(operation='um', reference=reference, comment=comment)
topic_revision.topic_id = topic_id
topic_revision.user_id = user_id
topic_revision.merged_to_id = merged_to_id
topic_revision.save()
return topic_id
else:
return '此话题没被合并'
else:
return '话题不存在'
def merge_topic_action(user_id, topic_id, merged_to_id, comment=''):
"""All args are integer; return topic_id(int) if succeded, otherwise return error message"""
if topic_id == merged_to_id:
return '不能合并到自身话题'
topic = Topic.objects.get(pk=topic_id)
if topic:
if topic.locked or topic.deleted:
return '此话题已被锁定或被删除'
elif not topic.merged_to_id:
merge_to_topic = Topic.objects.get(pk=merged_to_id)
if not merge_to_topic or merge_to_topic.deleted:
return '要合并到的话题不存在或已被删除'
#Find the topic that should really be merged to;
#Should not be normal flow since merged topic won't show up in query suggestion, just in case
if merge_to_topic.merged_to_id:
merged_to_id = merge_to_topic.merged_to_id
topic.merged_to_id = merged_to_id
topic.save()
#Modify the topics that are merged to me
merge_to_me_topics = Topic.objects.filter(merged_to__id=topic_id)
if merge_to_me_topics:
for mt in merge_to_me_topics:
mt.merged_to_id = merged_to_id
mt.save()
item_topic_set = Item_Topic.objects.filter(topic__id=topic_id)
if item_topic_set:
for item_topic in item_topic_set:
existing_item_topic = Item_Topic.objects.filter(item__id=item_topic.item_id, topic__id=merged_to_id)
if not existing_item_topic:
item_topic.topic_merged_from_id = item_topic.topic_id
item_topic.topic_id = merged_to_id
item_topic.save()
topic_parent_set = Topic_Parent.objects.filter(parent__id=topic_id)
if topic_parent_set:
for topic_parent in topic_parent_set:
topic_parent.parent_merged_from_id = topic_parent.parent_id
topic_parent.parent_id = merged_to_id
topic_parent.save()
refs = Topic_Revision.objects.filter(topic__id=topic_id, operation='um').order_by('-pk')
if refs:
reference = refs[0]
if reference.user_id != user_id:
notification = Notification(operation='m')
notification.user_id = reference.user_id
notification.related_user_id = user_id
notification.topic_id = topic_id
notification.incr_count_in_profile()
notification.save()
update_user_topic_fame(topic_id, user_id, reference.user_id)
else:
reference = None
update_user_topic_fame(topic_id, user_id)
topic_revision = Topic_Revision(operation='m', reference=reference, comment=comment)
topic_revision.topic_id = topic_id
topic_revision.user_id = user_id
topic_revision.merged_to_id = merged_to_id
topic_revision.save()
return topic_id
else:
return '此话题已被合并，不能重复操作'
else:
return '话题不存在'
