Remove XML and using first or initialize.

app/controllers/responses_controller.rb

@@ -1,36 +1,30 @@
 class ResponsesController < ApplicationController
   require 'csv'
   # GET /responses
-  # GET /responses.xml
   layout proc { |c| c.request.xhr? ? false : 'application' }
   def index
     @responses = Response.all
 
     respond_to do |format|
       format.html # index.html.erb
-      format.xml  { render xml: @responses }
     end
   end
 
   # GET /responses/1
-  # GET /responses/1.xml
   def show
     @response = Response.find(params[:id])
 
     respond_to do |format|
       format.html # show.html.erb
-      format.xml  { render xml: @response }
     end
   end
 
   # GET /responses/new
-  # GET /responses/new.xml
   def new
     @response = Response.new
 
     respond_to do |format|
       format.html # new.html.erb
-      format.xml  { render xml: @response }
     end
   end
 
@@ -53,67 +47,82 @@ def export_to_csv
 
     csv_string = CSV.generate do |csv|
       # header row
-      csv << ['id', 'participant_id', 'group', 'error', 'essay', 'Correct?', 'Field Before Correction', 'Seconds to Complete', 'Round','Treatment', 'Time Corrected']
+      csv << [
+        'id',
+        'participant_id',
+        'group',
+        'error',
+        'essay',
+        'Correct?',
+        'Field Before Correction',
+        'Seconds to Complete',
+        'Round',
+        'Treatment',
+        'Time Corrected'
+      ]
 
       # data rows
       @responses.each do |response|
-        csv << [response.id, response.user_id, response.user.group, response.error, response.essay, response.correct, response.uncorrected, response.round_number, response.user.time_to_complete, response.controller, response.created_at]
+        csv << [
+          response.id,
+          response.user_id,
+          response.user.group,
+          response.error,
+          response.essay,
+          response.correct,
+          response.uncorrected,
+          response.round_number,
+          response.user.time_to_complete,
+          response.controller,
+          response.created_at
+        ]
       end
     end
 
     # send it to the browsah
     send_data csv_string,
-      type: 'text/csv; charset=iso-8859-1; header=present',
-      disposition: 'attachment; filename=responses.csv'
+              type: 'text/csv; charset=iso-8859-1; header=present',
+              disposition: 'attachment; filename=responses.csv'
   end
 
   # POST /responses
-  # POST /responses.xml
   def create
     @user = User.find_or_create_by_id(params[:participant_id], group: params[:group])
-    @response =  @user.responses.where(:error => params[:response][:id], :round_number => params[:response][:round_number]).first_or_create
-    @response.update_attributes(params[:response])
+    @response =  @user.responses.where(error: params[:response][:id], round_number: params[:response][:round_number]).first_or_initalize(params[:response])
 
     respond_to do |format|
       if @response.save
         format.js
         format.html { redirect_to(@response, notice: 'Response was successfully created.') }
-        format.xml  { render xml: @response, status: :created, location: @response }
 
       else
         format.js { render js: "#{ @response.errors}" }
         format.html { render action: 'new' }
-        format.xml  { render xml: @response.errors, status: :unprocessable_entity }
 
       end
     end
   end
 
   # PUT /responses/1
-  # PUT /responses/1.xml
   def update
     @response = Response.find(params[:id])
 
     respond_to do |format|
       if @response.update_attributes(params[:response])
         format.html { redirect_to(@response, notice: 'Response was successfully updated.') }
-        format.xml  { head :ok }
       else
         format.html { render action: 'edit' }
-        format.xml  { render xml: @response.errors, status: :unprocessable_entity }
       end
     end
   end
 
   # DELETE /responses/1
-  # DELETE /responses/1.xml
   def destroy
     @response = Response.find(params[:id])
     @response.destroy
 
     respond_to do |format|
       format.html { redirect_to(responses_url) }
-      format.xml  { head :ok }
     end
   end
 end