Add box detail page with thumbnails and view tests

boxes/views.py

@@ -1,7 +1,20 @@
 from django.http import HttpResponse
+from django.shortcuts import get_object_or_404, render
+
+from .models import Box
 
 
 def index(request):
     """Simple index page."""
     html = '<h1>LabHelper</h1><p><a href="/admin/">Admin</a></p>'
     return HttpResponse(html)
+
+
+def box_detail(request, box_id):
+    """Display contents of a box."""
+    box = get_object_or_404(Box, pk=box_id)
+    things = box.things.select_related('thing_type').all()
+    return render(request, 'boxes/box_detail.html', {
+        'box': box,
+        'things': things,
+    })