First pass at the debug submission view

apps/submissions/templates/submissions.html

 <h3>Submissions for {{ student_id }} > {{ course_id }} > {{ item_id }}:</h3>
+{{ error }} <br/>
 {{ submissions|length }} total submissions. <br/>
 <br/>
 <table border=1>

apps/submissions/urls.py

 from django.conf.urls import url, patterns
 
-urlpatterns = patterns('submissions.views',
-                       url(r'^submissions/(?P<student_id>[^/]+)/(?P<course_id>[^/]+)/(?P<item_id>[^/]+)$',
-                           'get_submissions_for_student_item'),
+urlpatterns = patterns(
+    'submissions.views',
+    url(r'^submissions/(?P<student_id>[^/]+)/(?P<course_id>[^/]+)/(?P<item_id>[^/]+)$',
+        'get_submissions_for_student_item'),
+    (r'^accounts/login/$', 'django.contrib.auth.views.login'),
 )
 
+

apps/submissions/views.py

 import logging
+from django.contrib.auth.decorators import login_required
 
 from django.shortcuts import render_to_response
-from submissions import api
+from submissions.api import SubmissionRequestError, get_submissions
 
 log = logging.getLogger(__name__)
 
 
+@login_required()
 def get_submissions_for_student_item(request, course_id, student_id, item_id):
     """Retrieve all submissions associated with the given student item.
 
@@ -20,7 +22,9 @@ def get_submissions_for_student_item(request, course_id, student_id, item_id):
         item_id (str): The item id for this student item.
 
     Returns:
-        HttpResponse: The response object for this request.
+        HttpResponse: The response object for this request. Renders a simple
+            development page with all the submissions related to the specified
+            student item.
 
     """
     student_item_dict = dict(
@@ -28,11 +32,11 @@ def get_submissions_for_student_item(request, course_id, student_id, item_id):
         student_id=student_id,
         item_id=item_id,
     )
-    submissions = api.get_submissions(student_item_dict)
-
-    context = dict(
-        submissions=submissions,
-        **student_item_dict
-    )
+    context = dict(**student_item_dict)
+    try:
+        submissions = get_submissions(student_item_dict)
+        context["submissions"] = submissions
+    except SubmissionRequestError:
+        context["error"] = "The specified student item was not found."
 
     return render_to_response('submissions.html', context)