improve template not found debugging

itf/app/models.py

@@ -7,6 +7,7 @@ from django.core.paginator import Paginator, InvalidPage, EmptyPage
 from django.template.loader import render_to_string
 from django.contrib.contenttypes.models import ContentType
 from insidepages.models import ModuleTab, ModelExtra
+from os.path import exists
 
 def splitSearch(string):
   ret = []
@@ -80,10 +81,14 @@ class ItfModel(models.Model):
     return self.get(self._get_fields().keys())
 
   def insidepage_dict(self):
+    if not exists(self.get_template_path()):
+        return {
+            'html': "Template for this model not found."
+        }
     try:
         html = render_to_string(self.get_template_path(), self.info_dict())
     except:
-        html = "Template for this model not found."
+        html = "Template render error."
     return {
         'url': self.get_absolute_url(),
         'title': self.get_title(),