ruby on rails 3.2 - Rails3 installing Jquery plugins disables javascript altogether -

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i'm running rails 3.2.13 rvm. each time want install new jquery plugin (i tried tablesorter http://tablesorter.com/ ) javascript frozen, , other plugins used work (miraculously, ends doing so, magic...) disabled , when uninstall last culprit , elements, still don't work anymore, sending me stone-age each-time...

here application.js:

    //= require jquery     //= require jquery_ujs     //= require jquery-ui     //= require_tree .     //= require jquery.ui.datepicker-fr     //= require best_in_place

i had managed have date_picker , best_in_place work @ same time. have installed , uninstalled tablesorter, neither of them works anymore...

it extremely frustrating. after numerous readings, think has either assets pipeline (which makes absolute mess of public/assets folder...) or rvm caching of assets... have in application.rb:

     config.assets.enabled = true

i set because use heroku in production, need assets compiled there.

i read many questions , answers relating assets pipeline mess, either complex me comprehend, or people wrote them supposed readers experts when aren't, , didn't go enough details in simple words, or context didn't apply case, either because related rails version prior mine or didn't use heroku , suggested disable assets pipeline, needed there...

could knowledgeable enough please take few minutes explain, in simple words , detailed actions undertaken, going on , should ? think must not 1 undergoing ordeal.

i appreciate help.

put //= require_tree . @ last.

you calls plugins should placed @ last.


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