After you use kaminari in Ruby on Rails, do not introduce the will_pagination gem.

This problem found during development today

The per function of kaminari cannot be used in any configuration, and the page size is fixed at 30.

At first, I thought it was the gem of ransack. I searched the internet for a long time and found that no

 

Finally, check carefully. It turns out that the gemfile contains will_pagination. After you delete it, everything will return to normal.

 

After you use kaminari in Ruby on Rails, do not introduce the will_pagination gem.