Allow deleting candidates

views/votes_edit.erb

@@ -17,6 +17,9 @@
 <% @vote.candidates.each do |candidate| %>
 <h3><%= candidate.name %></h3>
 <p><%= candidate.description %></p>
+<form action="/votes/<%= @vote.secure_id %>/candidates/<%= candidate.id %>/delete" method="post">
+  <button type="submit">Delete candidate</button>
+</form>
 <% end %>
 
 <h3>Add candidate</h3>

vote.rb

@@ -15,7 +15,7 @@ end
 
 class Candidate < ActiveRecord::Base
   belongs_to :vote
-  has_many :ratings
+  has_many :ratings, dependent: :destroy
 
   def mj
     return MajorityJudgment.new(self.ratings.collect {|r| r.value })
@@ -151,6 +151,15 @@ post '/votes/:id/candidates' do
   redirect '/votes/' + @vote.secure_id
 end
 
+post '/votes/:id/candidates/:cid/delete' do
+  redirect '/login' unless current_user
+  @vote = Vote.find_by(secure_id: params[:id])
+  redirect '/votes/' + @vote.secure_id unless @vote.state == "draft" and @vote.users.exists?(current_user.id)
+  @candidate = Candidate.find(params[:cid])
+  @candidate.destroy
+  redirect '/votes/' + @vote.secure_id
+end
+
 post '/votes/:id/open' do
   redirect '/login' unless current_user
   @vote = Vote.find_by(secure_id: params[:id])