Allow max_per_page to be changed via config

[stephenlawrence]

As an admin, I want to be able to set the max_per_page value in the AA configuration so that I can limit the maximum number of items that will return for a single page in case a user tries to over-ride via per_page with a number I find to be too high.

[eshaiju]

@stephenlawrence
You can set this using config.default_per_page = 30
https://github.com/activeadmin/activeadmin/blob/master/docs/3-index-pages.md#user-content-index-pagination

[stephenlawrence]

I am looking for max_per_page, not default_per_page. As far as I can tell, the max_per_page is hardcoded to 10,000. I would like it lower than that since users can over-ride via the &per_page parameter.

[timoschilling]

max_per_page don't work in your case, max_per_page is only the fallback value.

What we need to support your case (which is a good point btw.) is:

1. make max_per_page configurable
2. ActiveAdmin::ResourceController::DataAccess#per_page need's to check the value of dynamic_per_page || configured_per_page against max_per_page and returns max_per_page if dynamic_per_page || configured_per_page is higher.

[timoschilling]

closed by #4052