Adding custom 500 error page

cadasta/config/urls/default.py

@@ -13,7 +13,11 @@
     1. Add an import:  from blog import urls as blog_urls
     2. Add a URL to urlpatterns:  url(r'^blog/', include(blog_urls))
 """
-from django.conf.urls import include, url
+from django.conf.urls import include, url, handler500
+
+server_error_handler = handler500
+
+server_error_handler = 'core.views.default.server_error'
 
 api_v1 = [
     url(r'^account/', include('accounts.urls.api', namespace='accounts')),

cadasta/core/tests/test_views_default.py

@@ -1,21 +1,22 @@
 import json
 
-from django.http import HttpRequest
+from accounts.tests.factories import UserFactory
+from core.tests.base_test_case import UserTestCase
 from django.contrib.auth.models import AnonymousUser
+from django.http import HttpRequest
 from django.template import RequestContext
 from django.template.loader import render_to_string
-
-from core.tests.base_test_case import UserTestCase
-from tutelary.models import Role
-from accounts.tests.factories import UserFactory
-from organization.tests.factories import OrganizationFactory, ProjectFactory
+from django.test import TestCase
 from organization.models import OrganizationRole, Project
 from organization.serializers import ProjectGeometrySerializer
+from organization.tests.factories import OrganizationFactory, ProjectFactory
+from tutelary.models import Role
 
-from ..views.default import IndexPage, Dashboard
+from ..views.default import Dashboard, IndexPage, server_error
 
 
 class IndexPageTest(UserTestCase):
+
     def setUp(self):
         super().setUp()
         self.view = IndexPage.as_view()
@@ -37,6 +38,7 @@ def test_page_is_rendered_when_user_is_not_signed_in(self):
 
 
 class DashboardTest(UserTestCase):
+
     def setUp(self):
         super().setUp()
         self.view = Dashboard.as_view()
@@ -117,3 +119,14 @@ def test_get_with_superuser(self):
         response = self.view(self.request).render()
         assert response.status_code == 200
         self._test_projects_rendered(response, superuser=True)
+
+
+class ServerErrorTest(TestCase):
+
+    def setUp(self):
+        super().setUp()
+        self.request = HttpRequest()
+
+    def test_server_error(self):
+        response = server_error(self.request, template_name='500.html')
+        assert response.status_code == 500

cadasta/core/views/default.py

@@ -1,11 +1,10 @@
 import json
 
-from django.shortcuts import redirect
 from core.views.generic import TemplateView
-from organization.models import Project, Organization
-from tutelary.models import Role
-
+from django.shortcuts import redirect
+from organization.models import Organization, Project
 from organization.serializers import ProjectGeometrySerializer
+from tutelary.models import Role
 
 
 class IndexPage(TemplateView):
@@ -29,8 +28,8 @@ def get(self, request, *args, **kwargs):
         projects = []
         superuser = Role.objects.filter(name='superuser')
         if len(superuser) and hasattr(self.request.user, 'assigned_policies'):
-                if superuser[0] in self.request.user.assigned_policies():
-                    projects = Project.objects.filter(extent__isnull=False)
+            if superuser[0] in self.request.user.assigned_policies():
+                projects = Project.objects.filter(extent__isnull=False)
         if projects == []:
             if hasattr(self.request.user, 'organizations'):
                 user_orgs = self.request.user.organizations.all()
@@ -45,3 +44,16 @@ def get(self, request, *args, **kwargs):
                 extent__isnull=False))
         context = self.get_context_data(projects=projects)
         return super(TemplateView, self).render_to_response(context)
+
+
+def server_error(request, template_name='500.html'):
+    """
+    500 error handler.
+
+    Templates: `500.html`
+    Context: None
+    """
+    from django.template import RequestContext, loader
+    from django.http import HttpResponseServerError
+    t = loader.get_template(template_name)
+    return HttpResponseServerError(t.render(RequestContext(request)))

cadasta/templates/500.html

@@ -0,0 +1,15 @@
+{% load i18n %}
+<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01//EN"
+    "http://www.w3.org/TR/html4/strict.dtd">
+<html lang="en">
+<head>
+    <title>{% trans 'Platform Error' %}</title>
+</head>
+<body>
+    <h1>{% trans 'Platform Error' %}</h1>
+
+    <p>{% trans "We're sorry, our platform encountered an error while processing your request." %}</p>
+
+    <p>{% trans 'Our developers have been notified.' %}</p>
+</body>
+</html>