Created attachment 2387 [details]
crashed_toaster_project_page

Hi,

For 1.8 M2 RC2, commit: 22c38e2d8a058619e3d05534b5e830b750aa4241, for a particular project, the configuration page ("Edit configuration variables") allow users to add two or more variables having the same name as the one that is already added.
This is causing toaster project configuration page to crash.

select name, value from orm_projectvariable;
 name = IMAGE_INSTALL_append
value = 

 name = PACKAGE_CLASSES
value = package_rpm

 name = MACHINE
value = genericx86-64

 name = SDKMACHINE
value = x86_64

 name = DISTRO
value = poky

 name = IMAGE_FSTYPES
value = ext3 jffs2 tar.bz2

 name = MACHINE
value = qemux86

Below the traceback from toaster_web.log:

Internal Server Error: /toastergui/project/1/
Traceback (most recent call last):
  File "/usr/local/lib/python2.7/dist-packages/django/core/handlers/base.py", line 115, in get_response
    response = callback(request, *callback_args, **callback_kwargs)
  File "/home/ionut/work/poky_1.8/poky/bitbake/lib/toaster/toastergui/views.py", line 2056, in project
    context["machine"] = {"name": prj.projectvariable_set.get(name="MACHINE").value}
  File "/usr/local/lib/python2.7/dist-packages/django/db/models/manager.py", line 143, in get
    return self.get_query_set().get(*args, **kwargs)
  File "/usr/local/lib/python2.7/dist-packages/django/db/models/query.py", line 405, in get
    (self.model._meta.object_name, num, kwargs))
MultipleObjectsReturned: get() returned more than one ProjectVariable -- it returned 2! Lookup parameters were {'name': 'MACHINE'}
[04/Feb/2015 15:39:48] "GET /toastergui/project/1/ HTTP/1.1" 500 86331

Attached the screen shot with the crashed page.

Cheers,
Ionut C