Update the smart link app to use Django templating language. gh-issues #151.

mayan/apps/document_comments/apps.py

@@ -38,8 +38,11 @@ class DocumentCommentsApp(MayanAppConfig):
             )
         )
 
-        ModelAttribute(
-            Document, label=_('Comments'), name='comments', type_name='related'
+        ModelPermission.register(
+            model=Document, permissions=(
+                permission_comment_create, permission_comment_delete,
+                permission_comment_view
+            )
         )
 
         SourceColumn(source=Comment, label=_('Date'), attribute='submit_date')
@@ -51,13 +54,6 @@ class DocumentCommentsApp(MayanAppConfig):
         )
         SourceColumn(source=Comment, label=_('Comment'), attribute='comment')
 
-        ModelPermission.register(
-            model=Document, permissions=(
-                permission_comment_create, permission_comment_delete,
-                permission_comment_view
-            )
-        )
-
         menu_sidebar.bind_links(
             links=(link_comment_add,),
             sources=(

mayan/apps/documents/apps.py

@@ -95,6 +95,12 @@ class DocumentsApp(MayanAppConfig):
             Document, label=_('Label'), name='label', type_name='field'
         )
 
+        ModelAttribute(
+            Document,
+            description=_('The MIME type of any of the versions of a document'),
+            label=_('MIME type'), name='versions__mimetype', type_name='field'
+        )
+
         ModelPermission.register(
             model=Document, permissions=(
                 permission_acl_edit, permission_acl_view,

mayan/apps/linking/models.py

@@ -2,6 +2,7 @@ from __future__ import unicode_literals
 
 from django.db import models
 from django.db.models import Q
+from django.template import Context, Template
 from django.utils.encoding import python_2_unicode_compatible
 from django.utils.translation import ugettext_lazy as _
 
@@ -17,8 +18,10 @@ class SmartLink(models.Model):
     label = models.CharField(max_length=96, verbose_name=_('Label'))
     dynamic_label = models.CharField(
         blank=True, max_length=96, help_text=_(
-            'This expression will be evaluated against the current selected '
-            'document.'
+            'Enter a template to render. '
+            'Use Django\'s default templating language '
+            '(https://docs.djangoproject.com/en/1.7/ref/templates/builtins/). '
+            'The {{ document }} context variable is available.'
         ), verbose_name=_('Dynamic label')
     )
     enabled = models.BooleanField(default=True, verbose_name=_('Enabled'))
@@ -31,16 +34,16 @@ class SmartLink(models.Model):
 
     def get_dynamic_label(self, document):
         if self.dynamic_label:
+            context = Context({'document': document})
             try:
-                return eval(self.dynamic_label, {'document': document})
+                template = Template(self.dynamic_label)
+                return template.render(context=context)
             except Exception as exception:
-                return Exception(
-                    _(
-                        'Error generating dynamic label; %s' % unicode(exception)
-                    )
+                return _(
+                    'Error generating dynamic label; %s' % unicode(exception)
                 )
         else:
-            return self.label
+            return None
 
     def get_linked_document_for(self, document):
         if document.document_type.pk not in self.document_types.values_list('pk', flat=True):
@@ -53,11 +56,15 @@ class SmartLink(models.Model):
 
         smart_link_query = Q()
 
+        context = Context({'document': document})
+
         for condition in self.conditions.filter(enabled=True):
+            template = Template(condition.expression)
+
             condition_query = Q(**{
                 '%s__%s' % (
                     condition.foreign_document_data, condition.operator
-                ): eval(condition.expression, {'document': document})
+                ): template.render(context=context)
             })
             if condition.negated:
                 condition_query = ~condition_query
@@ -104,7 +111,10 @@ class SmartLinkCondition(models.Model):
     operator = models.CharField(choices=OPERATOR_CHOICES, max_length=16)
     expression = models.TextField(
         help_text=_(
-            'This expression will be evaluated against the current document.'
+            'Enter a template to render. '
+            'Use Django\'s default templating language '
+            '(https://docs.djangoproject.com/en/1.7/ref/templates/builtins/). '
+            'The {{ document }} context variable is available.'
         ), verbose_name=_('Expression')
     )
     negated = models.BooleanField(

mayan/apps/linking/views.py

@@ -116,16 +116,22 @@ class ResolvedSmartLinkView(DocumentListView):
         return queryset
 
     def get_extra_context(self):
-        return {
-            'hide_links': True,
-            'object': self.document,
-            'title': _(
-                'Documents in smart link "%(smart_link)s" as relation to '
+        dynamic_label = self.smart_link.get_dynamic_label(self.document)
+        if dynamic_label:
+            title = _('Documents in smart link: %s') % dynamic_label
+        else:
+            title = _(
+                'Documents in smart link "%(smart_link)s" as related to '
                 '"%(document)s"'
             ) % {
                 'document': self.document,
-                'smart_link': self.smart_link.get_dynamic_label(self.document),
+                'smart_link': self.smart_link.label,
             }
+
+        return {
+            'hide_links': True,
+            'object': self.document,
+            'title': title,
         }
 
 

mayan/apps/metadata/models.py

@@ -45,7 +45,7 @@ class MetadataType(models.Model):
         blank=True, null=True,
         help_text=_(
             'Enter a template to render. '
-            'Must result in a command delimited string. '
+            'Must result in a comma delimited string. '
             'Use Django\'s default templating language '
             '(https://docs.djangoproject.com/en/1.7/ref/templates/builtins/).'
         ),