{"categories":["Ruby on Rails"],"published":"2017-06-19 19:03:06","blog_title":"\u30ce\u30f3\u30ab\u30d5\u30a7\u30a4\u30f3\u3067\u3042\u306a\u305f\u306b\u3084\u3055\u3057\u3044","url":"https://akinobu.net/entry/2017/06/19/190306","blog_url":"https://akinobu.net/","author_url":"https://blog.hatena.ne.jp/kuronekopunk/","provider_name":"Hatena Blog","author_name":"kuronekopunk","version":"1.0","height":"190","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fakinobu.net%2Fentry%2F2017%2F06%2F19%2F190306\" title=\"Rails\u3067DB\u306b\u914d\u5217Array\u3092\u4fdd\u5b58\u3059\u308b - \u30ce\u30f3\u30ab\u30d5\u30a7\u30a4\u30f3\u3067\u3042\u306a\u305f\u306b\u3084\u3055\u3057\u3044\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","title":"Rails\u3067DB\u306b\u914d\u5217Array\u3092\u4fdd\u5b58\u3059\u308b","width":"100%","description":"Rails\u3067DB\u306b\u914d\u5217\u3092\u4fdd\u5b58\u3059\u308b\u65b9\u6cd5 serialize :column_name \u3092\u6307\u5b9a Rails\u3067DB\u306b\u914d\u5217\u3092\u4fdd\u5b58\u3059\u308b\u65b9\u6cd5(\u30b5\u30f3\u30d7\u30eb\u30b3\u30fc\u30c9) class Hoge < ApplicationRecord serialize :arr end hoge = Hoge.new(arr: [1, 2, 3]) puts hoge.arr # => [1, 2, 3] Array\u3068\u660e\u793a\u3059\u308b\u3068\u3053\u3046\u3044\u3046\u4f7f\u3044\u65b9\u3082\u3067\u304d\u308b\u307f\u305f\u3044 class Hoge < ApplicationRecord serialize :arr, Array end hoge = Hoge.new hoge.arr << 1 <<\u2026","image_url":null,"provider_url":"https://hatena.blog","type":"rich"}