Haystack says “Model could not be found for SearchResult”

Question

After updating my Django from 1.7 to 1.9, search engine, which is based on Haystack and Solr, stopped working. This is what I get:

./manage.py shell
Python 2         


        

Answer 1

I was able to fix the issue by including a missing commit to the 2.4.1 release. The commit that fixed this issue was https://github.com/django-haystack/django-haystack/commit/f1ed18313777005dd77ed724ecbfb27c0b03cad8

so you can do

pip install git+ssh://git@github.com/django-haystack/django-haystack.git@f1ed18313777005dd77ed724ecbfb27c0b03cad8

to install until that specific commit.