Add support for an --image flag to atest.

frontend/afe/model_logic.py

 """
 Extensions to Django's model logic.
 """
 
 import re
 import django.core.exceptions
 from django.db import models as dbmodels, backend, connection
 from django.db.models.sql import query
 import django.db.models.sql.where
 from django.utils import datastructures
@@ skipping 659 matching lines @@
                     else:
                         to_val, from_val = choice_data
                     if from_val == data[field_name]:
                         data[field_name] = to_val
                         break
             # convert foreign key values
             elif field_obj.rel:
                 dest_obj = field_obj.rel.to.smart_get(data[field_name],
                                                       valid_only=False)
                 if to_human_readable:
-                    if dest_obj.name_field is not None:
+                    # parameterized_jobs do not have a name_field
+                    if (field_name != 'parameterized_job' and
+                        dest_obj.name_field is not None):
                         data[field_name] = getattr(dest_obj,
                                                    dest_obj.name_field)
                 else:
                     data[field_name] = dest_obj
 
 
     @classmethod
     def validate_field_names(cls, data):
         'Checks for extraneous fields in data.'
         errors = {}
@@ skipping 482 matching lines @@
 
         The exception is that save(force_insert=True) will be allowed, since
         that creates a new row. However, the preferred way to make instances of
         these models is through the get_or_create() method.
         """
         if not force_insert:
             # Allow a forced insert to happen; if it's a duplicate, the unique
             # constraint will catch it later anyways
             raise Exception('ModelWithHash is immutable')
         super(ModelWithHash, self).save(force_insert=force_insert, **kwargs)