ä»ã¾ã§ä½åº¦ã¨ãªããã¡ã¤ã«ã¢ãããã¼ããæ¸ãã¦ã¯å¿ãããã®é½åº¦èª¿ã¹ã¦ã¦ãããå æ¸ç²ãã¦ããã®ã§ããã«ã¡ã¢ããä»å¾ã¯ãããã³ããããæ¹åã§ã åºæ¬çã«ãã¡ãã®ã³ãã¼ãªã®ã§ãè¦respond_to_parentãã©ã°ã¤ã³ã説æããã¡ããåç §ãããã«ã¯åã«ã³ã¼ãã ãç½®ãã¨ãã¾ãã ã§ãããã¨ã¯ãç»é¢é·ç§»ç¡ãã®ãã¡ã¤ã«ã¢ãããã¼ãã¨ããã©ã¼ã ã®ä¸ã«è¡¨ç¤ºããã¦ãããã¡ã¤ã«ãªã¹ãã®éåæãªæ´æ°ã ãã¼ãã«ã¯ãããªæã class CreateUploadedFiles < ActiveRecord::Migration def self.up create_table :uploaded_files do |t| t.column :filename, :string t.column :content_type, :string t.column :size, :integer t.column :d


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