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I'm using an API instead of a database, so I'm not using ActiveRecord but ActiveModel (I mostly did like here: railscasts.com/episodes/219-active-model) Thing is, when I try to edit an item (in my case a parking), the action of the form still remains the action of the create and not update. so when I go on /parkings/2/edit to edit a parking, the form is still: <form accept-charset="UTF-8" action="/parkings" class="form-horizontal" id="new_parking" method="post"> when it should be more like that with the put hidden field and the parkings/2 as the action: <form accept-charset="UTF-8" action="/parkings/2" class="form-horizontal" id="edit_parking" method="post"><div style="margin:0;padding:0;display:inline"><input name="utf8" type="hidden" value="&#x2713;" /><input name="_method" type="hidden" value="put" /> Anybody knows where the method & action of the form_for is set according to the route? What I'm trying to do is be as close as if I was using ActiveRecord with a database. Here is some code : _form.html.erb <%= form_for(@parking, :html => { :class => "form-horizontal" }) do |f| %> ... <% end %> edit.html.erb & new.html.erb, simply has <%= render 'form' %> Controller class ParkingsController < ApplicationController def index @parkings = Parse.get("Parking") respond_to do |format| format.html format.json { render :json => @parking } end end def new @parking = Parking.new respond_to do |format| format.html format.json { render :json => @parking } end end def edit @parking = Parking.find(params[:id]) respond_to do |format| format.html format.json { render :json => @parking }

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