Merge branch 'main' into feature/111

backend/app/controllers/posts_controller.rb

@@ -88,7 +88,7 @@ class PostsController < ApplicationController
     original_created_from = params[:original_created_from]
     original_created_before = params[:original_created_before]
 
-    post = Post.new(title:, url:, thumbnail_base: '', uploaded_user: current_user,
+    post = Post.new(title:, url:, thumbnail_base: nil, uploaded_user: current_user,
                     original_created_from:, original_created_before:)
     post.thumbnail.attach(thumbnail)
     if post.save

backend/app/models/tag_similarity.rb

@@ -0,0 +1,4 @@
+class TagSimilarity < ApplicationRecord
+  belongs_to :tag, class_name: 'Tag', foreign_key: 'tag_id'
+  belongs_to :target_tag, class_name: 'Tag', foreign_key: 'target_tag_id'
+end