Code modified to enable reversion disable feature

1 files changed, 256 insertions, 78 deletions

diff --git a/gstudio/models.py b/gstudio/models.py
index 65262cc..4e047fc 100644
--- a/gstudio/models.py
+++ b/gstudio/models.py
@@ -93,6 +93,7 @@ from gstudio.settings import NODETYPE_TEMPLATES
 from gstudio.settings import NODETYPE_BASE_MODEL
 from gstudio.settings import MARKDOWN_EXTENSIONS
 from gstudio.settings import AUTO_CLOSE_COMMENTS_AFTER
+from gstudio.settings import GSTUDIO_VERSIONING
 from gstudio.managers import nodetypes_published
 from gstudio.managers import NodetypePublishedManager
 from gstudio.managers import NodePublishedManager
@@ -103,11 +104,13 @@ from gstudio.url_shortener import get_url_shortener
 from gstudio.signals import ping_directories_handler
 from gstudio.signals import ping_external_urls_handler
 import json
-import reversion
+if GSTUDIO_VERSIONING:
+    import reversion
 from reversion.models import Version
 from django.core import serializers
 from reversion.models import *
 
+
 NODETYPE_CHOICES = (
     ('ND', 'Nodes'),
     ( 'OB' ,'Objects'),
@@ -210,6 +213,9 @@ class NID(models.Model):
     slug = models.SlugField(help_text=_('used for publication'),
                             unique_for_date='creation_date',
                             max_length=255)
+    nodemodel = models.CharField(_('nodemodel'),max_length=255)
+
+
 
 
     def get_serialized_dict(self):
@@ -241,22 +247,25 @@ class NID(models.Model):
 
     @property
     def ref(self):
-        """ 
-        Returns the object reference the id belongs to.
-        """
-        try:
-            """ 
-            ALGO:     get object id, go to version model, return for the given id.
-            """
-
-            # Retrieving only the relevant tupleset for the versioned objects
-            vrs = Version.objects.filter(type=0 , object_id=self.id)
-            # Returned value is a list, so splice it.                                                                                                     
-            vrs =  vrs[0]            
-        except:
-            return None
+        return eval(self.nodemodel).objects.get(id=self.id)
         
-        return vrs.object
+        # """ 
+        # Returns the object reference the id belongs to.
+        # """
+        # try:
+        #     """ 
+        #     ALGO:     get object id, go to version model, return for the given id.
+        #     """
+
+        #     # Retrieving only the relevant tupleset for the versioned objects
+        #     # vrs = Version.objects.filter(type=0 , object_id=self.id)
+        #     # Returned value is a list, so splice it.                                                                                                     
+        #     vrs =  vrs[0]            
+        # except:
+        #     return None
+        
+        # return vrs.object
+    
     
     @property
     def reftype(self):
@@ -266,9 +275,11 @@ class NID(models.Model):
         try:
             """ 
             ALGO: simple wrapper for the __class__.__name__ so that it can be used in templates  
+            
             """
-            obj = self.ref
-            return obj.__class__.__name__
+            return self.__class__.__name__
+            # obj = self.ref
+            # return obj.__class__.__name__
         
         except:
             return None
@@ -317,6 +328,8 @@ class Node(NID):
 
     sites = models.ManyToManyField(Site, verbose_name=_('sites publication'),
                                    related_name='nodetypes')
+    nbhood = models.TextField(help_text="The neighbourhood of the model.")
+    
     published = NodePublishedManager()
     def __unicode__(self):
         return self.title
@@ -324,11 +337,16 @@ class Node(NID):
     class Meta:
         abstract=False
 
-    @reversion.create_revision()
+   
     def save(self, *args, **kwargs):
+        if GSTUDIO_VERSIONING:
+            with reversion.create_revision():
+                super(Node, self).save(*args, **kwargs) # Call the "real" save() method.
         super(Node, self).save(*args, **kwargs) # Call the "real" save() method.
 
 
+
+
 class Edge(NID):
 
 
@@ -337,9 +355,11 @@ class Edge(NID):
 
     class Meta:
         abstract=False
-    @reversion.create_revision()
-    # Save for edge
     def save(self, *args, **kwargs):
+        if GSTUDIO_VERSIONING:
+            with reversion.create_revision():
+                super(Edge, self).save(*args, **kwargs) # Call the "real" save() method.
+
         super(Edge, self).save(*args, **kwargs) # Call the "real" save() method.
 
 
@@ -524,8 +544,12 @@ class Metatype(Node):
         verbose_name_plural = _('metatypes')
 
     # Save for metatype
-    @reversion.create_revision()
+
     def save(self, *args, **kwargs):
+        if GSTUDIO_VERSIONING:
+            with reversion.create_revision():
+                super(Metatype, self).save(*args, **kwargs) # Call the "real" save() method.
+
         super(Metatype, self).save(*args, **kwargs) # Call the "real" save() method.
 
 
@@ -1159,8 +1183,10 @@ class Nodetype(Node):
                        ('can_change_author', 'Can change author'), )
     
     # Save for nodetype
-    @reversion.create_revision()
     def save(self, *args, **kwargs):
+        if GSTUDIO_VERSIONING:
+            with reversion.create_revision():
+                super(Nodetype, self).save(*args, **kwargs) # Call the "real" save() method.
         super(Nodetype, self).save(*args, **kwargs) # Call the "real" save() method.
 
 
@@ -1343,8 +1369,13 @@ class Objecttype(Nodetype):
                        ('can_change_author', 'Can change author'), )
 
     # Save for Objecttype
-    @reversion.create_revision()
+    # @reversion.create_revision()
     def save(self, *args, **kwargs):
+        self.nodemodel = self.__class__.__name__
+        if GSTUDIO_VERSIONING:
+            with reversion.create_revision():
+                super(Objecttype, self).save(*args, **kwargs) # Call the "real" save() method.
+        
         super(Objecttype, self).save(*args, **kwargs) # Call the "real" save() method.
 
 
@@ -1390,8 +1421,14 @@ class Relationtype(Nodetype):
                        ('can_change_author', 'Can change author'), )
 
     # Save for Relationtype
-    @reversion.create_revision()
+    # @reversion.create_revision()
     def save(self, *args, **kwargs):
+        self.nodemodel = self.__class__.__name__
+        if GSTUDIO_VERSIONING:
+            with reversion.create_revision():
+                self.nodemodel = self.__class__.__name__
+
+
         super(Relationtype, self).save(*args, **kwargs) # Call the "real" save() method.
 
 
@@ -1439,8 +1476,13 @@ class Attributetype(Nodetype):
                        ('can_change_author', 'Can change author'), )
 
     # Save for Attributetype
-    @reversion.create_revision()
+
     def save(self, *args, **kwargs):
+        self.nodemodel = self.__class__.__name__
+
+        if GSTUDIO_VERSIONING:
+            with reversion.create_revision():
+                super(Attributetype, self).save(*args, **kwargs) # Call the "real" save() method.
         super(Attributetype, self).save(*args, **kwargs) # Call the "real" save() method.
 
 
@@ -1537,8 +1579,12 @@ class Relation(Edge):
     
     
     # Save for Relation
-    @reversion.create_revision()
+
     def save(self, *args, **kwargs):
+        self.nodemodel = self.__class__.__name__
+        if GSTUDIO_VERSIONING:
+            with reversion.create_revision():
+                super(Relation, self).save(*args, **kwargs) # Call the "real" save() method.
         super(Relation, self).save(*args, **kwargs) # Call the "real" save() method.
 
 
@@ -1619,8 +1665,13 @@ class Attribute(Edge):
                 return each.get_members
 
     # Save for Attribute
-    @reversion.create_revision()
+
     def save(self, *args, **kwargs):
+        self.nodemodel = self.__class__.__name__
+        if GSTUDIO_VERSIONING:
+            with reversion.create_revision():
+                super(Attribute, self).save(*args, **kwargs) # Call the "real" save() method.
+
         super(Attribute, self).save(*args, **kwargs) # Call the "real" save() method.
 
                     
@@ -1634,8 +1685,13 @@ class AttributeCharField(Attribute):
         return self.title
 
     
-    @reversion.create_revision()
+    # @reversion.create_revision()
     def save(self, *args, **kwargs):
+        self.nodemodel = self.__class__.__name__
+        if GSTUDIO_VERSIONING:
+            with reversion.create_revision():
+                super(AttributeCharField, self).save(*args, **kwargs) # Call the "real" save() method.
+
         super(AttributeCharField, self).save(*args, **kwargs) # Call the "real" save() method.
 
 
@@ -1646,8 +1702,12 @@ class AttributeTextField(Attribute):
     def __unicode__(self):
         return self.title
 
-    @reversion.create_revision()
+    # @reversion.create_revision()
     def save(self, *args, **kwargs):
+        self.nodemodel = self.__class__.__name__
+        if GSTUDIO_VERSIONING:
+            with reversion.create_revision():
+                super(AttributeTextField, self).save(*args, **kwargs) # Call the "real" save() method.
         super(AttributeTextField, self).save(*args, **kwargs) # Call the "real" save() method.
 
     
@@ -1657,10 +1717,15 @@ class AttributeIntegerField(Attribute):
      def __unicode__(self):
          return self.title
 
-     @reversion.create_revision()
+     # @reversion.create_revision()
      def save(self, *args, **kwargs):
-        super(AttributeIntegerField, self).save(*args, **kwargs) # Call the "real" save() method.
+         self.nodemodel = self.__class__.__name__
+         if GSTUDIO_VERSIONING:
+             with reversion.create_revision():
+                 super(AttributeIntegerField, self).save(*args, **kwargs) # Call the "real" save() method.
 
+         super(AttributeIntegerField, self).save(*args, **kwargs) # Call the "real" save() method.
+         
 
 
 class AttributeCommaSeparatedIntegerField(Attribute):
@@ -1670,8 +1735,12 @@ class AttributeCommaSeparatedIntegerField(Attribute):
     def __unicode__(self):
         return self.title
 
-    @reversion.create_revision()
+    # @reversion.create_revision()
     def save(self, *args, **kwargs):
+        self.nodemodel = self.__class__.__name__
+        if GSTUDIO_VERSIONING:
+            with reversion.create_revision():
+                super(AttributeCommaSeparatedIntegerField, self).save(*args, **kwargs) # Call the "real" save() method.
         super(AttributeCommaSeparatedIntegerField, self).save(*args, **kwargs) # Call the "real" save() method.
 
 class AttributeBigIntegerField(Attribute):
@@ -1688,8 +1757,12 @@ class AttributePositiveIntegerField(Attribute):
     def __unicode__(self):
         return self.title
 
-    @reversion.create_revision()
+    # @reversion.create_revision()
     def save(self, *args, **kwargs):
+        self.nodemodel = self.__class__.__name__
+        if GSTUDIO_VERSIONING:
+            with reversion.create_revision():
+                super(AttributePositiveIntegerField, self).save(*args, **kwargs) # Call the "real" save() method.
         super(AttributePositiveIntegerField, self).save(*args, **kwargs) # Call the "real" save() method.
 
 
@@ -1700,6 +1773,12 @@ class AttributeDecimalField(Attribute):
     def __unicode__(self):
         return self.title
     def save(self, *args, **kwargs):
+        self.nodemodel = self.__class__.__name__
+        if GSTUDIO_VERSIONING:
+            with reversion.create_revision():
+                super(AttributeDecimalField, self).save(*args, **kwargs) # Call the "real" save() method.
+
+
         super(AttributeDecimalField, self).save(*args, **kwargs) # Call the "real" save() method.
 
 class AttributeFloatField(Attribute):
@@ -1709,8 +1788,13 @@ class AttributeFloatField(Attribute):
     def __unicode__(self):
         return self.title
 
-    @reversion.create_revision()
+    # @reversion.create_revision()
     def save(self, *args, **kwargs):
+        self.nodemodel = self.__class__.__name__
+        if GSTUDIO_VERSIONING:
+            with reversion.create_revision():
+                super(AttributeFloatField, self).save(*args, **kwargs) # Call the "real" save() method.
+
         super(AttributeFloatField, self).save(*args, **kwargs) # Call the "real" save() method.
 
 
@@ -1721,6 +1805,11 @@ class AttributeBooleanField(Attribute):
     def __unicode__(self):
         return self.title
     def save(self, *args, **kwargs):
+        self.nodemodel = self.__class__.__name__
+        if GSTUDIO_VERSIONING:
+            with reversion.create_revision():
+                super(AttributeBooleanField, self).save(*args, **kwargs) # Call the "real" save() method.
+
         super(AttributeBooleanField, self).save(*args, **kwargs) # Call the "real" save() method.
 
 
@@ -1731,8 +1820,12 @@ class AttributeNullBooleanField(Attribute):
     def __unicode__(self):
         return self.title
 
-    @reversion.create_revision()
+
     def save(self, *args, **kwargs):
+        self.nodemodel = self.__class__.__name__
+        if GSTUDIO_VERSIONING:
+            with reversion.create_revision():
+                super(AttributeNullBooleanField, self).save(*args, **kwargs) # Call the "real" save() method.
         super(AttributeNullBooleanField, self).save(*args, **kwargs) # Call the "real" save() method.
 
 
@@ -1743,8 +1836,12 @@ class AttributeDateField(Attribute):
     def __unicode__(self):
         return self.title
 
-    @reversion.create_revision()
+
     def save(self, *args, **kwargs):
+        if GSTUDIO_VERSIONING:
+            with reversion.create_revision():
+                super(AttributeDateField, self).save(*args, **kwargs) # Call the "real" save() method.
+
         super(AttributeDateField, self).save(*args, **kwargs) # Call the "real" save() method.
 
 
@@ -1755,8 +1852,13 @@ class AttributeDateTimeField(Attribute):
     def __unicode__(self):
         return self.title
 
-    @reversion.create_revision()
+    # @reversion.create_revision()
     def save(self, *args, **kwargs):
+        self.nodemodel = self.__class__.__name__
+        if GSTUDIO_VERSIONING:
+            with reversion.create_revision():
+                super(AttributeDateTimeField, self).save(*args, **kwargs) # Call the "real" save() method.
+
         super(AttributeDateTimeField, self).save(*args, **kwargs) # Call the "real" save() method.
 
     
@@ -1767,8 +1869,13 @@ class AttributeTimeField(Attribute):
     def __unicode__(self):
         return self.title
 
-    @reversion.create_revision()
+    # @reversion.create_revision()
     def save(self, *args, **kwargs):
+        self.nodemodel = self.__class__.__name__
+        if GSTUDIO_VERSIONING:
+            with reversion.create_revision():
+                super(AttributeTimeField, self).save(*args, **kwargs) # Call the "real" save() method.
+
         super(AttributeTimeField, self).save(*args, **kwargs) # Call the "real" save() method.
 
 
@@ -1779,8 +1886,12 @@ class AttributeEmailField(Attribute):
     def __unicode__(self):
         return self.title
 
-    @reversion.create_revision()
+    # @reversion.create_revision()
     def save(self, *args, **kwargs):
+        if GSTUDIO_VERSIONING:
+            with reversion.create_revision():
+                super(AttributeEmailField, self).save(*args, **kwargs) # Call the "real" save() method.
+
         super(AttributeEmailField, self).save(*args, **kwargs) # Call the "real" save() method.
 
 
@@ -1791,8 +1902,13 @@ class AttributeFileField(Attribute):
     def __unicode__(self):
         return self.title
 
-    @reversion.create_revision()
+    # @reversion.create_revision()
     def save(self, *args, **kwargs):
+        self.nodemodel = self.__class__.__name__
+        if GSTUDIO_VERSIONING:
+            with reversion.create_revision():
+                super(AttributeFileField, self).save(*args, **kwargs) # Call the "real" save() method.
+
         super(AttributeFileField, self).save(*args, **kwargs) # Call the "real" save() method.
 
 
@@ -1803,8 +1919,13 @@ class AttributeFilePathField(Attribute):
     def __unicode__(self):
         return self.title
 
-    @reversion.create_revision()
+    # @reversion.create_revision()
     def save(self, *args, **kwargs):
+        self.nodemodel = self.__class__.__name__
+        if GSTUDIO_VERSIONING:
+            with reversion.create_revision():
+                super(AttributeFilePathField, self).save(*args, **kwargs) # Call the "real" save() method.
+
         super(AttributeFilePathField, self).save(*args, **kwargs) # Call the "real" save() method.
 
 
@@ -1815,8 +1936,9 @@ class AttributeImageField(Attribute):
     def __unicode__(self):
         return self.title
 
-    @reversion.create_revision()
+    # @reversion.create_revision()
     def save(self, *args, **kwargs):
+        self.nodemodel = self.__class__.__name__
         super(AttributeImageField, self).save(*args, **kwargs) # Call the "real" save() method.
 
 
@@ -1827,8 +1949,13 @@ class AttributeURLField(Attribute):
     def __unicode__(self):
         return self.title
 
-    @reversion.create_revision()
+    # @reversion.create_revision()
     def save(self, *args, **kwargs):
+        self.nodemodel = self.__class__.__name__
+        if GSTUDIO_VERSIONING:
+            with reversion.create_revision():
+                super(AttributeURLField, self).save(*args, **kwargs) # Call the "real" save() method.
+
         super(AttributeURLField, self).save(*args, **kwargs) # Call the "real" save() method.
 
 
@@ -1839,8 +1966,13 @@ class AttributeIPAddressField(Attribute):
     def __unicode__(self):
         return self.title
 
-    @reversion.create_revision()
+    # @reversion.create_revision()
     def save(self, *args, **kwargs):
+        self.nodemodel = self.__class__.__name__
+        if GSTUDIO_VERSIONING:
+            with reversion.create_revision():
+                super(AttributeIPAddressField, self).save(*args, **kwargs) # Call the "real" save() method.
+
         super(AttributeIPAddressField, self).save(*args, **kwargs) # Call the "real" save() method.
 
 
@@ -1867,8 +1999,13 @@ class Processtype(Nodetype):
         verbose_name_plural = _('process types')
         permissions = (('can_view_all', 'Can view all'),
                        ('can_change_author', 'Can change author'), )
-    @reversion.create_revision()
+    # @reversion.create_revision()
     def save(self, *args, **kwargs):
+        self.nodemodel = self.__class__.__name__
+        if GSTUDIO_VERSIONING:
+            with reversion.create_revision():
+                super(Processtype, self).save(*args, **kwargs) # Call the "real" save() method.
+
         super(Processtype, self).save(*args, **kwargs) # Call the "real" save() method.
 
 
@@ -1903,8 +2040,13 @@ class Systemtype(Nodetype):
         permissions = (('can_view_all', 'Can view all'),
                        ('can_change_author', 'Can change author'), )
 
-    @reversion.create_revision()
+    # @reversion.create_revision()
     def save(self, *args, **kwargs):
+        self.nodemodel = self.__class__.__name__
+        if GSTUDIO_VERSIONING:
+            with reversion.create_revision():
+                super(Systemtype, self).save(*args, **kwargs) # Call the "real" save() method.
+
         super(Systemtype, self).save(*args, **kwargs) # Call the "real" save() method.
 
     
@@ -1932,6 +2074,7 @@ class AttributeSpecification(Node):
 
 
     def __unicode__(self):
+        self.nodemodel = self.__class__.__name__
         return self.composed_subject
 
 
@@ -1940,8 +2083,13 @@ class AttributeSpecification(Node):
         permissions = (('can_view_all', 'Can view all'),
                        ('can_change_author', 'Can change author'), )
 
-    @reversion.create_revision()
+    # @reversion.create_revision()
     def save(self, *args, **kwargs):
+        self.nodemodel = self.__class__.__name__
+        if GSTUDIO_VERSIONING:
+            with reversion.create_revision():
+                super(AttributeSpecification, self).save(*args, **kwargs) # Call the "real" save() method.
+
         super(AttributeSpecification, self).save(*args, **kwargs) # Call the "real" save() method.
 
 
@@ -1975,8 +2123,13 @@ class RelationSpecification(Node):
         permissions = (('can_view_all', 'Can view all'),
                        ('can_change_author', 'Can change author'), )
 
-    @reversion.create_revision()
+    # @reversion.create_revision()
     def save(self, *args, **kwargs):
+        self.nodemodel = self.__class__.__name__
+        if GSTUDIO_VERSIONING:
+            with reversion.create_revision():
+                super(RelationSpecification, self).save(*args, **kwargs) # Call the "real" save() method.
+
         super(RelationSpecification, self).save(*args, **kwargs) # Call the "real" save() method.
 
 
@@ -2011,8 +2164,13 @@ class NodeSpecification(Node):
         permissions = (('can_view_all', 'Can view all'),
                        ('can_change_author', 'Can change author'), )
 
-    @reversion.create_revision()
+    # @reversion.create_revision()
     def save(self, *args, **kwargs):
+        self.nodemodel = self.__class__.__name__
+        if GSTUDIO_VERSIONING:
+            with reversion.create_revision():
+                super(NodeSpecification, self).save(*args, **kwargs) # Call the "real" save() method.
+
         super(NodeSpecification, self).save(*args, **kwargs) # Call the "real" save() method.
 
 
@@ -2044,8 +2202,13 @@ class Expression(Node):
         permissions = (('can_view_all', 'Can view all'),
                        ('can_change_author', 'Can change author'), )
 
-    @reversion.create_revision()
+    # @reversion.create_revision()
     def save(self, *args, **kwargs):
+        self.nodemodel = self.__class__.__name__
+        if GSTUDIO_VERSIONING:
+            with reversion.create_revision():
+                super(Expression, self).save(*args, **kwargs) # Call the "real" save() method.
+
         super(Expression, self).save(*args, **kwargs) # Call the "real" save() method.
 
 
@@ -2060,8 +2223,13 @@ class Union(Node):
     def __unicode__(self):
         return self.title
 
-    @reversion.create_revision()
+    # @reversion.create_revision()
     def save(self, *args, **kwargs):
+        self.nodemodel = self.__class__.__name__
+        if GSTUDIO_VERSIONING:
+            with reversion.create_revision():
+                super(Union, self).save(*args, **kwargs) # Call the "real" save() method.
+
         super(Union, self).save(*args, **kwargs) # Call the "real" save() method.
 
 
@@ -2076,8 +2244,13 @@ class Complement(Node):
     def __unicode__(self):
         return self.title
 
-    @reversion.create_revision()
+    # @reversion.create_revision()
     def save(self, *args, **kwargs):
+        self.nodemodel = self.__class__.__name__
+        if GSTUDIO_VERSIONING:
+            with reversion.create_revision():
+                super(Complement, self).save(*args, **kwargs) # Call the "real" save() method.
+
         super(Complement, self).save(*args, **kwargs) # Call the "real" save() method.
 
 
@@ -2090,48 +2263,53 @@ class Intersection(Node):
     def __unicode__(self):
         return self.title
 
-    @reversion.create_revision()
+    # @reversion.create_revision()
     def save(self, *args, **kwargs):
+        self.nodemodel = self.__class__.__name__
+        if GSTUDIO_VERSIONING:
+            with reversion.create_revision():
+                super(Intersection, self).save(*args, **kwargs) # Call the "real" save() method.
+
         super(Intersection, self).save(*args, **kwargs) # Call the "real" save() method.
 
     
+if GSTUDIO_VERSIONING == True:
+    reversion.register(NID)
 
-reversion.register(NID)
-
-if not reversion.is_registered(Systemtype):
-    reversion.register(Systemtype)
+    if not reversion.is_registered(Systemtype):
+        reversion.register(Systemtype)
 
-if not reversion.is_registered(Objecttype):
-    reversion.register(Objecttype , follow=["nodetype_ptr"])
+    if not reversion.is_registered(Objecttype):
+        reversion.register(Objecttype , follow=["nodetype_ptr"])
 
-if not reversion.is_registered(Node):
-    reversion.register(Node , follow=["nid_ptr"])
+    if not reversion.is_registered(Node):
+        reversion.register(Node , follow=["nid_ptr"])
 
-if not reversion.is_registered(Edge):
-    reversion.register(Edge , follow=["nid_ptr"])
+    if not reversion.is_registered(Edge):
+        reversion.register(Edge , follow=["nid_ptr"])
 
 
-if not reversion.is_registered(Processtype):
-    reversion.register(Processtype, follow=["changing_attributetype_set", "changing_relationtype_set"])
+    if not reversion.is_registered(Processtype):
+        reversion.register(Processtype, follow=["changing_attributetype_set", "changing_relationtype_set"])
 
-if not reversion.is_registered(Nodetype): 
-    reversion.register(Nodetype, follow=["node_ptr","parent", "metatypes","prior_nodes", "posterior_nodes"])
+    if not reversion.is_registered(Nodetype): 
+        reversion.register(Nodetype, follow=["node_ptr","parent", "metatypes","prior_nodes", "posterior_nodes"])
 
-if not reversion.is_registered(Metatype):
-    reversion.register(Metatype, follow=["node_ptr","parent"])
+    if not reversion.is_registered(Metatype):
+        reversion.register(Metatype, follow=["node_ptr","parent"])
 
 
-if not reversion.is_registered(Relationtype): 
-    reversion.register(Relationtype, follow=["left_subjecttype", "right_subjecttype"])
+    if not reversion.is_registered(Relationtype): 
+        reversion.register(Relationtype, follow=["left_subjecttype", "right_subjecttype"])
 
-if not reversion.is_registered(Attributetype): 
-    reversion.register(Attributetype, follow=["subjecttype"])
+    if not reversion.is_registered(Attributetype): 
+        reversion.register(Attributetype, follow=["subjecttype"])
 
-if not reversion.is_registered(Attribute): 
-    reversion.register(Attribute, follow=["subject", "attributetype"])
+    if not reversion.is_registered(Attribute): 
+        reversion.register(Attribute, follow=["subject", "attributetype"])
 
-if not reversion.is_registered(Relation): 
-    reversion.register(Relation, follow=["left_subject", "right_subject", "relationtype"])
+    if not reversion.is_registered(Relation): 
+        reversion.register(Relation, follow=["left_subject", "right_subject", "relationtype"])
 
 moderator.register(Nodetype, NodetypeCommentModerator)
 mptt.register(Metatype, order_insertion_by=['title'])