fix for missing field

printaform/formaprint/models.py

@@ -29,7 +29,10 @@ class Item(models.Model):
         d = json.loads(self.json)
         for f in fields:
             short_name = f['short_name']
+            if d.has_key(short_name):
                 f['value'] = d[short_name]
+            else:
+                f['value'] = ''
         return fields
 
     def render(self):
@@ -38,6 +41,7 @@ class Item(models.Model):
         context = Context(json.loads(self.json))
         return t.render(context)
 
+
 class ItemType(models.Model):
     name = models.CharField(max_length=100, unique=True)
     description = models.TextField(blank=True)