带有新控制器动作导轨的Ajax

Question

I have created a new micropost controller action called more to receive ajax request.

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

and I have created jquery file- more.js.erb

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

to replace the content with a partial my route file is like

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

and i call the javascript file in the view with

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

Its working with normal html request but not ajax.Nothing happens when I click on the link. I saw similar questions asked by some but the fixes are not working for me. Can someone help me with this. Thanks in advance.. The error in firebug console is

`500 internal server error. NoMethodError in MicropostsController#more. Undefined method id for nil:NilClass'

The firebug error console shows this jquery line on the right hand side. I am not sure if its an error.

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

Answer 1

judging by the error you posted in the comments, this line may be a problem:

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

find_by requires a hash, so either use find

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

or

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