Add some more failsafe for administration

passbook/core/models.py

@@ -157,6 +157,8 @@ class Application(PolicyModel):
 
     def get_provider(self):
         """Get casted provider instance"""
+        if not self.provider:
+            return None
         return Provider.objects.get_subclass(pk=self.provider.pk)
 
     def __str__(self):

passbook/core/templates/login/base.html

@@ -29,7 +29,7 @@
 <div class="login-pf-page">
     <div class="container-fluid">
         <div class="row">
-            <div class="col-sm-12 col-md-8 col-md-offset-2 col-lg-4 col-lg-offset-4">
+            <div class="col-sm-12 col-md-8 col-md-offset-2 col-lg-6 col-lg-offset-3">
                 <header class="login-pf-page-header">
                     <img class="login-pf-brand" style="max-height: 10rem;" src="{% static 'img/logo.svg' %}"
                         alt="passbook logo" />

passbook/lib/templatetags/utils.py

@@ -212,10 +212,14 @@ def gravatar(email, size=None, rating=None):
 @register.filter
 def verbose_name(obj):
     """Return Object's Verbose Name"""
+    if not obj:
+        return ''
     return obj._meta.verbose_name
 
 
 @register.filter
 def form_verbose_name(obj):
     """Return ModelForm's Object's Verbose Name"""
+    if not obj:
+        return ''
     return obj._meta.model._meta.verbose_name