Prevent mixed plurality from getting into jobs code

api/jobs.py

@@ -47,6 +47,9 @@ FileInput = namedtuple('input', ['container_type', 'container_id', 'filename', '
 
 # Convert a dictionary to a FileInput
 def convert_to_fileinput(d):
+    if d['container_type'].endswith('s'):
+        raise Exception('Container type cannot be plural :|')
+
     return FileInput(
         container_type= d['container_type'],
         container_id  = d['container_id'],
@@ -101,6 +104,9 @@ def queue_job(db, algorithm_id, input, attempt_n=1, previous_job_id=None):
     if algorithm_id not in ALGORITHMS:
         raise Exception('Usupported algorithm ' + algorithm_id)
 
+    if input.container_type.endswith('s'):
+        raise Exception('Container type cannot be plural :|')
+
     # TODO validate container exists
 
     now = datetime.datetime.utcnow()