javascript - Ajax with new controller action rails -

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i have created new micropost controller action called more receive ajax request.

def more   micropost=micropost.find_by(params[:id])   @answers=micropost.answers   respond_to |format|    format.html {redirect_to micropost}    format.js   end end

and have created jquery file- more.js.erb 

$(".microposts").html("<%= escape_javascript(render('users/unfollow')) %>"); `

to replace content partial route file like

resources :microposts, only: [:edit,:create,:destroy,:update,:show,:more]   member     :more   end end

and call javascript file in view with

<%= link_to "load more",more_micropost_path(micropost),remote: true %>

its working normal html request not ajax.nothing happens when click on link. saw similar questions asked fixes not working me. can me this. in advance.. error in firebug console

`500 internal server error. nomethoderror in micropostscontroller#more. undefined method id nil:nilclass'

the firebug error console shows jquery line on right hand side. not sure if error.

lixhr.send( ( options.hascontent && options.data ) || null );

judging error posted in comments, line may problem: 

micropost = micropost.find_by(params[:id])

find_by requires hash, either use find

micropost = micropost.find(params[:id])

or 

micropost = micropost.find_by(id: params[:id])

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