answer inserts

app/controllers/candidate_controller.rb

@@ -9,12 +9,25 @@ class CandidateController < ApplicationController
     redirect_to :summary and return if qid.nil?
 
     @question = current_candidate.fetch_question(qid)
+    @answer = Answer.new
   end
 
-  def update_question
-    redirect_to :summary and return if params.key?(:update)
-    redirect_to :saved and return if params.key?(:save)
-    redirect_to :question
+  def update_answer
+    answer_ids = { question_id: answer_params[:question_id], candidate_id: current_candidate.to_i }
+    @answer = Answer.find_or_create_by!(answer_ids)
+    @answer.answer = answer_for_type
+    @answer.saved = answer_params[:save]
+    @answer.submitted = answer_params[:next]
+
+    if @answer.save
+      redirect_to :summary and return if params.key?(:update)
+      redirect_to :saved and return if params.key?(:save)
+      redirect_to :question
+    else
+      flash[:error] = [answer_params[:question_id]]
+      @question = current_candidate.fetch_question(qid)
+      render :question
+    end
   end
 
   def summary
@@ -56,7 +69,18 @@ class CandidateController < ApplicationController
 
   private
 
-    def question_params
-      params.permit(:save)
+    def answer_params
+      params.require(:answer).permit(
+        :question_id, :answer_id,
+        :save, :next, :summary,
+        :radio, :text, checkbox: [], live_coder: []
+      )
+    end
+
+    def answer_for_type
+      return answer_params[:radio] unless answer_params[:radio].nil?
+      return answer_params[:text] unless answer_params[:text].nil?
+      return answer_params[:checkbox] unless answer_params[:checkbox].nil?
+      return answer_params[:live_coder] unless answer_params[:live_coder].nil?
     end
 end