MultipleObjectsReturned at /admin/wagtail_review/reviews/2/view/

[Adrien Lemaire]

Exception Value: | get() returned more than one Reviewer -- it returned 2!

Traceback

Environment:


Request Method: GET
Request URL: http://localhost:8000/admin/wagtail_review/reviews/2/view/

Django Version: 2.1.8
Python Version: 3.7.3
Installed Applications:
['home',
 'blog',
 'search',
 'wagtail.contrib.forms',
 'wagtail.contrib.redirects',
 'wagtail.embeds',
 'wagtail.sites',
 'wagtail.users',
 'wagtail.snippets',
 'wagtail.documents',
 'wagtail.images',
 'wagtail.search',
 'wagtail.admin',
 'wagtail.core',
 'modelcluster',
 'taggit',
 'wagtail_review',
 'django.contrib.admin',
 'django.contrib.auth',
 'django.contrib.contenttypes',
 'django.contrib.sessions',
 'django.contrib.messages',
 'django.contrib.staticfiles']
Installed Middleware:
['django.contrib.sessions.middleware.SessionMiddleware',
 'django.middleware.common.CommonMiddleware',
 'django.middleware.csrf.CsrfViewMiddleware',
 'django.contrib.auth.middleware.AuthenticationMiddleware',
 'django.contrib.messages.middleware.MessageMiddleware',
 'django.middleware.clickjacking.XFrameOptionsMiddleware',
 'django.middleware.security.SecurityMiddleware',
 'wagtail.core.middleware.SiteMiddleware',
 'wagtail.contrib.redirects.middleware.RedirectMiddleware']



Traceback:

File "/home/dori/.virtualenvs/project/lib/python3.7/site-packages/django/core/handlers/exception.py" in inner
  34.             response = get_response(request)

File "/home/dori/.virtualenvs/project/lib/python3.7/site-packages/django/core/handlers/base.py" in _get_response
  126.                 response = self.process_exception_by_middleware(e, request)

File "/home/dori/.virtualenvs/project/lib/python3.7/site-packages/django/core/handlers/base.py" in _get_response
  124.                 response = wrapped_callback(request, *callback_args, **callback_kwargs)

File "/home/dori/.virtualenvs/project/lib/python3.7/site-packages/django/views/decorators/cache.py" in _wrapped_view_func
  44.         response = view_func(request, *args, **kwargs)

File "/home/dori/.virtualenvs/project/lib/python3.7/site-packages/wagtail/admin/urls/__init__.py" in wrapper
  102.             return view_func(request, *args, **kwargs)

File "/home/dori/.virtualenvs/project/lib/python3.7/site-packages/wagtail/admin/decorators.py" in decorated_view
  34.             return view_func(request, *args, **kwargs)

File "/home/dori/.virtualenvs/project/lib/python3.7/site-packages/wagtail_review/views/admin.py" in view_review_page
  133.         reviewer = review.reviewers.get(user=request.user)

File "/home/dori/.virtualenvs/project/lib/python3.7/site-packages/django/db/models/manager.py" in manager_method
  82.                 return getattr(self.get_queryset(), name)(*args, **kwargs)

File "/home/dori/.virtualenvs/project/lib/python3.7/site-packages/django/db/models/query.py" in get
  403.             (self.model._meta.object_name, num)

Exception Type: MultipleObjectsReturned at /admin/wagtail_review/reviews/2/view/
Exception Value: get() returned more than one Reviewer -- it returned 2!

Steps:

• Install wagtail and follow getting started tutorial v2.4
• Install wagtail-review
• As admin, create 4 articles, and ask a review for the fourth post (I believe).
• Login as editor, go to Reviews, but only the 3rd post (unpublished) appear (did I mistakenly ask a review for the 3rd post instead of the 4th?)
• As editor, go as a review to self for the 4th post
• from Reviews, click on the 4th post, the error happens.

Seeing 2 issues here:

• review request from admin didn't show up in Reviews
• Multiple reviewers (actually the same user twice) can be assigned to a post, but wagtail-review doesn't support it (wagtail_review/views/admin.py l.133)

[Adrien Lemaire]

Sorry for the lack of clarity, I'm just getting started with WagTail and don't yet understand the details behind it.

Here what I can see from a shell

In [27]: rf = Review.objects.first()

In [28]: PageRevision.objects.get(id=rf.page_revision_id)                                                   
Out[28]: <PageRevision: "Third post unpublished" at 2019-04-19 07:02:40.572529+00:00>                       

In [29]: [User.objects.get(id=r.user_id) for r in rf.reviewers.all()]                                       
Out[29]: [<User: Reviewer>, <User: dori>]

In [30]: rl = Review.objects.last()

In [31]: PageRevision.objects.get(id=rl.page_revision_id)                                                   
Out[31]: <PageRevision: "4th post to review" at 2019-04-19 07:04:40.425567+00:00>                           

In [32]: [User.objects.get(id=r.user_id) for r in rl.reviewers.all()]                                       
Out[32]: [<User: Reviewer>, <User: Reviewer>]

I do not know why my 3rd post has 2 reviewers. Is there some logic where unpublishing a post auto-assign reviewers? Strange... Also, no error happens when viewing it.

screenshot

I suppose the relevant bug report here is that the same user can be assigned twice for the same review, which causes a 500 error. Why the review made as admin didn't show up first in the user Reviews page is another concern.