#59

backend/app/models/post_similarity.rb

@@ -0,0 +1,4 @@
+class PostSimilarity < ApplicationRecord
+  belongs_to :post, class_name: 'Post', foreign_key: 'post_id'
+  belongs_to :target_post, class_name: 'Post', foreign_key: 'target_post_id'
+end