Reduce smart link code by using a proxy model.

mayan/apps/linking/models.py

@@ -10,7 +10,6 @@ from documents.models import Document, DocumentType
 from .literals import (
     INCLUSION_AND, INCLUSION_CHOICES, INCLUSION_OR, OPERATOR_CHOICES
 )
-from .managers import SmartLinkManager
 
 
 @python_2_unicode_compatible
@@ -20,8 +19,6 @@ class SmartLink(models.Model):
     enabled = models.BooleanField(default=True, verbose_name=_('Enabled'))
     document_types = models.ManyToManyField(DocumentType, verbose_name=_('Document types'))
 
-    objects = SmartLinkManager()
-
     def __str__(self):
         return self.title
 
@@ -34,6 +31,9 @@ class SmartLink(models.Model):
         else:
             return self.title
 
+    def resolve_for(self, document):
+        return ResolvedSmartLink(smart_link=self, queryset=self.get_linked_document_for(document))
+
     def get_linked_document_for(self, document):
         if document.document_type.pk not in self.document_types.values_list('pk', flat=True):
             raise Exception(_('This smart link is not allowed for the selected document\'s type.'))
@@ -62,6 +62,11 @@ class SmartLink(models.Model):
         verbose_name_plural = _('Smart links')
 
 
+class ResolvedSmartLink(SmartLink):
+    class Meta:
+        proxy = True
+
+
 @python_2_unicode_compatible
 class SmartLinkCondition(models.Model):
     smart_link = models.ForeignKey(SmartLink, related_name='conditions', verbose_name=_('Smart link'))