6 from django.utils.translation import ugettext as _
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7 from django.utils.safestring import mark_safe
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8 from django.utils.html import strip_tags
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9 from forum.utils.html import sanitize_html
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11 class NodeContent(models.Model):
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12 title = models.CharField(max_length=300)
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13 tagnames = models.CharField(max_length=125)
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14 author = models.ForeignKey(User, related_name='%(class)ss')
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15 body = models.TextField()
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23 return self.as_markdown()
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25 def as_markdown(self, *extensions):
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26 return mark_safe(sanitize_html(markdown.markdown(self.body, extensions=extensions)))
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32 def tagname_list(self):
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34 t = [name.strip() for name in self.tagnames.split(u' ') if name]
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35 return [name.strip() for name in self.tagnames.split(u' ') if name]
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39 def tagname_meta_generator(self):
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40 return u','.join([tag for tag in self.tagname_list()])
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46 class NodeMetaClass(BaseMetaClass):
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49 def __new__(cls, *args, **kwargs):
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50 new_cls = super(NodeMetaClass, cls).__new__(cls, *args, **kwargs)
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52 if not new_cls._meta.abstract and new_cls.__name__ is not 'Node':
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53 NodeMetaClass.types[new_cls.get_type()] = new_cls
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58 def setup_relations(cls):
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59 for node_cls in NodeMetaClass.types.values():
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60 NodeMetaClass.setup_relation(node_cls)
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63 def setup_relation(cls, node_cls):
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64 name = node_cls.__name__.lower()
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67 return node_cls.objects.filter(parent=self)
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70 p = self.__dict__.get('_%s_cache' % name, None)
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72 if p is None and (self.parent is not None) and self.parent.node_type == name:
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73 p = self.parent.leaf
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74 self.__dict__['_%s_cache' % name] = p
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78 Node.add_to_class(name + 's', property(children))
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79 Node.add_to_class(name, property(parent))
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82 class NodeQuerySet(CachedQuerySet):
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83 def obj_from_datadict(self, datadict):
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84 cls = NodeMetaClass.types.get(datadict.get("node_type", ""), None)
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87 obj.__dict__.update(datadict)
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90 return super(NodeQuerySet, self).obj_from_datadict(datadict)
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92 def get(self, *args, **kwargs):
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93 return super(NodeQuerySet, self).get(*args, **kwargs).leaf
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95 def filter_state(self, **kwargs):
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96 apply_bool = lambda q, b: b and q or ~q
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97 return self.filter(*[apply_bool(models.Q(state_string__contains="(%s)" % s), b) for s, b in kwargs.items()])
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100 class NodeManager(CachedManager):
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101 use_for_related_fields = True
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103 def get_query_set(self):
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104 qs = NodeQuerySet(self.model)
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106 if self.model is not Node:
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107 return qs.filter(node_type=self.model.get_type())
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111 def get_for_types(self, types, *args, **kwargs):
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112 kwargs['node_type__in'] = [t.get_type() for t in types]
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113 return self.get(*args, **kwargs)
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115 def filter_state(self, **kwargs):
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116 return self.all().filter_state(**kwargs)
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119 class NodeStateDict(object):
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120 def __init__(self, node):
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121 self.__dict__['_node'] = node
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123 def __getattr__(self, name):
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124 if self.__dict__.get(name, None):
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125 return self.__dict__[name]
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128 node = self.__dict__['_node']
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129 action = NodeState.objects.get(node=node, state_type=name).action
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130 self.__dict__[name] = action
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135 def __setattr__(self, name, value):
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136 current = self.__getattr__(name)
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140 current.action = value
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143 node = self.__dict__['_node']
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144 state = NodeState(node=node, action=value, state_type=name)
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146 self.__dict__[name] = value
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148 if not "(%s)" % name in node.state_string:
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149 node.state_string = "%s(%s)" % (node.state_string, name)
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153 node = self.__dict__['_node']
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154 node.state_string = "".join("(%s)" % s for s in re.findall('\w+', node.state_string) if s != name)
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156 current.node_state.delete()
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157 del self.__dict__[name]
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160 class NodeStateQuery(object):
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161 def __init__(self, node):
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162 self.__dict__['_node'] = node
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164 def __getattr__(self, name):
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165 node = self.__dict__['_node']
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166 return "(%s)" % name in node.state_string
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170 class Node(BaseModel, NodeContent):
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171 __metaclass__ = NodeMetaClass
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173 node_type = models.CharField(max_length=16, default='node')
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174 parent = models.ForeignKey('Node', related_name='children', null=True)
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175 abs_parent = models.ForeignKey('Node', related_name='all_children', null=True)
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177 added_at = models.DateTimeField(default=datetime.datetime.now)
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178 score = models.IntegerField(default=0)
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180 state_string = models.TextField(default='')
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182 #deleted = models.ForeignKey('Action', null=True, unique=True, related_name="deleted_node")
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183 #in_moderation = models.ForeignKey('Action', null=True, unique=True, related_name="moderated_node")
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184 last_edited = models.ForeignKey('Action', null=True, unique=True, related_name="edited_node")
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186 last_activity_by = models.ForeignKey(User, null=True)
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187 last_activity_at = models.DateTimeField(null=True, blank=True)
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189 tags = models.ManyToManyField('Tag', related_name='%(class)ss')
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190 active_revision = models.OneToOneField('NodeRevision', related_name='active', null=True)
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192 extra_ref = models.ForeignKey('Node', null=True)
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193 extra_count = models.IntegerField(default=0)
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194 #extra_action = models.ForeignKey('Action', null=True, related_name="extra_node")
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196 marked = models.BooleanField(default=False)
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197 #wiki = models.BooleanField(default=False)
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199 comment_count = DenormalizedField("children", node_type="comment", canceled=False)
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200 flag_count = DenormalizedField("flags")
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202 friendly_name = _("post")
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204 objects = NodeManager()
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207 def cache_key(cls, pk):
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208 return '%s:node:%s' % (settings.APP_URL, pk)
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212 return cls.__name__.lower()
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216 leaf_cls = NodeMetaClass.types.get(self.node_type, None)
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218 if leaf_cls is None:
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222 leaf.__dict__ = self.__dict__
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227 state = self.__dict__.get('_nstate', None)
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230 state = NodeStateDict(self)
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231 self._nstate = state
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237 nis = self.__dict__.get('_nis', None)
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240 nis = NodeStateQuery(self)
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246 #def deleted(self):
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247 # return self.nstate.deleted
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250 def absolute_parent(self):
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251 if not self.abs_parent_id:
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254 return self.abs_parent.leaf
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258 return strip_tags(self.html)[:300]
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261 def get_revisions_url(self):
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262 return ('revisions', (), {'id': self.id})
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264 def update_last_activity(self, user, save=False):
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265 self.last_activity_by = user
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266 self.last_activity_at = datetime.datetime.now()
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269 self.parent.update_last_activity(user, save=True)
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274 def _create_revision(self, user, number, **kwargs):
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275 revision = NodeRevision(author=user, revision=number, node=self, **kwargs)
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279 def create_revision(self, user, **kwargs):
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280 number = self.revisions.aggregate(last=models.Max('revision'))['last'] + 1
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281 revision = self._create_revision(user, number, **kwargs)
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282 self.activate_revision(user, revision)
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285 def activate_revision(self, user, revision):
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286 self.title = revision.title
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287 self.tagnames = revision.tagnames
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288 self.body = revision.body
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290 self.active_revision = revision
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291 self.update_last_activity(user)
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295 def _list_changes_in_tags(self):
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296 dirty = self.get_dirty_fields()
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298 if not 'tagnames' in dirty:
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301 if self._original_state['tagnames']:
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302 old_tags = set(name for name in self._original_state['tagnames'].split(u' '))
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305 new_tags = set(name for name in self.tagnames.split(u' ') if name)
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308 current=list(new_tags),
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309 added=list(new_tags - old_tags),
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310 removed=list(old_tags - new_tags)
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313 def _last_active_user(self):
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314 return self.last_edited and self.last_edited.by or self.author
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316 def _process_changes_in_tags(self):
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317 tag_changes = self._list_changes_in_tags()
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319 if tag_changes is not None:
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320 for name in tag_changes['added']:
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322 tag = Tag.objects.get(name=name)
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324 tag = Tag.objects.create(name=name, created_by=self._last_active_user())
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326 if not self.nis.deleted:
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327 tag.used_count = models.F('used_count') + 1
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330 if not self.nis.deleted:
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331 for name in tag_changes['removed']:
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333 tag = Tag.objects.get(name=name)
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334 tag.used_count = models.F('used_count') - 1
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343 def mark_deleted(self, action):
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344 self.nstate.deleted = action
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348 for tag in self.tags.all():
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349 tag.used_count = models.F('used_count') - 1
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352 for tag in Tag.objects.filter(name__in=self.tagname_list()):
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353 tag.used_count = models.F('used_count') + 1
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356 def save(self, *args, **kwargs):
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357 tags_changed = self._process_changes_in_tags()
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360 self.node_type = self.get_type()
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361 super(BaseModel, self).save(*args, **kwargs)
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362 self.active_revision = self._create_revision(self.author, 1, title=self.title, tagnames=self.tagnames, body=self.body)
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363 self.update_last_activity(self.author)
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365 if self.parent_id and not self.abs_parent_id:
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366 self.abs_parent = self.parent.absolute_parent
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368 super(Node, self).save(*args, **kwargs)
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369 if tags_changed: self.tags = list(Tag.objects.filter(name__in=self.tagname_list()))
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372 app_label = 'forum'
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375 class NodeRevision(BaseModel, NodeContent):
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376 node = models.ForeignKey(Node, related_name='revisions')
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377 summary = models.CharField(max_length=300)
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378 revision = models.PositiveIntegerField()
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379 revised_at = models.DateTimeField(default=datetime.datetime.now)
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382 unique_together = ('node', 'revision')
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383 app_label = 'forum'
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386 class NodeState(models.Model):
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387 node = models.ForeignKey(Node, related_name='states')
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388 state_type = models.CharField(max_length=16)
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389 action = models.OneToOneField('Action', related_name="node_state")
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392 unique_together = ('node', 'state_type')
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393 app_label = 'forum'
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