added admin (2) - fixed

app/models/candidate.rb

-class Candidate < ApplicationRecord
-	belongs_to :position
-end
+class Candidate < ActiveRecord::Base
+	        belongs_to :position
+	        has_many :votes
+	        
+	    def full_name
+	    	"#{ self.first_name }-#{ self.last_name }"
+	    end
+end
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