{"id":1271,"date":"2020-05-05T21:44:45","date_gmt":"2020-05-05T12:44:45","guid":{"rendered":"http:\/\/168.138.214.208\/?p=1271"},"modified":"2020-11-25T06:40:08","modified_gmt":"2020-11-24T21:40:08","slug":"post-1271","status":"publish","type":"post","link":"https:\/\/nobunobu1717.site\/?p=1271","title":{"rendered":"ActiveStorage\u3092\u4f7f\u7528\u3057\u305f\u753b\u50cf\u30a2\u30c3\u30d7\u30ed\u30fc\u30c9\u3068\u30d7\u30ec\u30d3\u30e5\u30fc\u6a5f\u80fd(Ruby on Rails)"},"content":{"rendered":"<div id=\"toc_container\" class=\"no_bullets\"><p class=\"toc_title\">Contents<\/p><ul class=\"toc_list\"><ul><li><a href=\"#i\"><span class=\"toc_number toc_depth_2\">0.1<\/span> \u6982\u8981<\/a><\/li><li><a href=\"#i-2\"><span class=\"toc_number toc_depth_2\">0.2<\/span> \u524d\u63d0<\/a><\/li><li><a href=\"#i-3\"><span class=\"toc_number toc_depth_2\">0.3<\/span> \u624b\u9806<\/a><\/li><\/ul><\/li><li><a href=\"#i-4\"><span class=\"toc_number toc_depth_1\">1<\/span> \u8a18\u4e8b\u7de8\u96c6(\u65b0\u898f)<\/a><ul><li><a href=\"#i-5\"><span class=\"toc_number toc_depth_2\">1.1<\/span> \u307e\u3068\u3081<\/a><\/li><\/ul><\/li><\/ul><\/div>\n<h2><span id=\"i\">\u6982\u8981<\/span><\/h2>\n<p>Ruby on Rails\u30675\u304b\u3089\u8ffd\u52a0\u3055\u308c\u305fActiveStorage\u3092\u4f7f\u3063\u305f\u30d5\u30a1\u30a4\u30eb\u30a2\u30c3\u30d7\u30ed\u30fc\u30c9\u6a5f\u80fd\u3092\u5b9f\u88c5\u3057\u305f\u6642\u306e\u30e1\u30e2<\/p>\n<blockquote class=\"wp-embedded-content\" data-secret=\"QuD243zA2e\"><p><a href=\"https:\/\/nobunobu1717.site\/?p=1271\">ActiveStorage\u3092\u4f7f\u7528\u3057\u305f\u753b\u50cf\u30a2\u30c3\u30d7\u30ed\u30fc\u30c9\u3068\u30d7\u30ec\u30d3\u30e5\u30fc\u6a5f\u80fd(Ruby on Rails)<\/a><\/p><\/blockquote>\n<p><iframe class=\"wp-embedded-content\" sandbox=\"allow-scripts\" security=\"restricted\" style=\"position: absolute; clip: rect(1px, 1px, 1px, 1px);\" title=\"&#8220;ActiveStorage\u3092\u4f7f\u7528\u3057\u305f\u753b\u50cf\u30a2\u30c3\u30d7\u30ed\u30fc\u30c9\u3068\u30d7\u30ec\u30d3\u30e5\u30fc\u6a5f\u80fd(Ruby on Rails)&#8221; &#8212; nobu blog\" src=\"https:\/\/nobunobu1717.site\/?p=1271&#038;embed=true#?secret=HqPKHk3Yts#?secret=QuD243zA2e\" data-secret=\"QuD243zA2e\" width=\"600\" height=\"338\" frameborder=\"0\" marginwidth=\"0\" marginheight=\"0\" scrolling=\"no\"><\/iframe><br \/>\n<div class=\"kattene\">\n    <div class=\"kattene__imgpart\"><a target=\"_blank\" rel=\"noopener\" href=\"https:\/\/www.amazon.co.jp\/gp\/product\/B07QW41QCM\/ref=as_li_tl?ie=UTF8&camp=247&creative=1211&creativeASIN=B07QW41QCM&linkCode=as2&tag=nobu17171009-22&linkId=63191532924b3d4e659f6460e293fa0a\"><img width=\"160\" height=\"160\" loading=\"lazy\" src=\"https:\/\/ws-fe.amazon-adsystem.com\/widgets\/q?_encoding=UTF8&MarketPlace=JP&ASIN=B07QW41QCM&ServiceVersion=20070822&ID=AsinImage&WS=1&Format=_SL250_&tag=nobu17171009-22\" class=\"kattene__shadow\" ><\/a><\/div>\n    <div class=\"kattene__infopart\">\n      <div class=\"kattene__title\"><a target=\"_blank\" rel=\"noopener\" href=\"https:\/\/www.amazon.co.jp\/gp\/product\/B07QW41QCM\/ref=as_li_tl?ie=UTF8&camp=247&creative=1211&creativeASIN=B07QW41QCM&linkCode=as2&tag=nobu17171009-22&linkId=63191532924b3d4e659f6460e293fa0a\">\u72ec\u7fd2Ruby on Rails<\/a><\/div>\n      <div class=\"kattene__description\"><\/div>\n      <div class=\"kattene__btns __one\"><div><a class=\"kattene__btn __orange\" target=\"_blank\" rel=\"noopener\" href=\"https:\/\/www.amazon.co.jp\/gp\/product\/B07QW41QCM\/ref=as_li_tl?ie=UTF8&camp=247&creative=1211&creativeASIN=B07QW41QCM&linkCode=as2&tag=nobu17171009-22&linkId=63191532924b3d4e659f6460e293fa0a\">Amazon<\/a><\/div><\/div><\/div><\/div><\/p>\n<h2><span id=\"i-2\">\u524d\u63d0<\/span><\/h2>\n<p>Mac OS 10.15.4<br \/>\n\u4e88\u3081Rails\u306e\u4e00\u5f0f\u306f\u30a4\u30f3\u30b9\u30c8\u30fc\u30eb\u6e08<br \/>\nRuby 2.6.3p62<br \/>\nRails 6.0.2.2<\/p>\n\n\t<p style=\"color:#666;margin-bottom:5px;\">\u30b9\u30dd\u30f3\u30b5\u30fc\u30ea\u30f3\u30af<\/p>\n\t<div class=\"middle-ad\">\n\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\n\n<h2><span id=\"i-3\">\u624b\u9806<\/span><\/h2>\n<h3>\u30a4\u30f3\u30b9\u30c8\u30fc\u30eb<\/h3>\n<p>\u4e0b\u8a18\u306e\u30b3\u30de\u30f3\u30c9\u3067ActiveStorage\u306e\u30a4\u30f3\u30b9\u30c8\u30fc\u30eb\u3068DB\u306e\u30de\u30a4\u30b0\u30ec\u30fc\u30b7\u30e7\u30f3\u3092\u5b9f\u65bd\u3059\u308b\u3002<br \/>\n(ActiveStorage\u3092\u30a4\u30f3\u30b9\u30c8\u30fc\u30eb\u3059\u308b\u3068\u65b0\u3057\u3044\u30c6\u30fc\u30d6\u30eb\u304c\u8ffd\u52a0\u3055\u308c\u308b\u305f\u3081\u3001\u30de\u30a4\u30b0\u30ec\u30fc\u30b7\u30e7\u30f3\u304c\u5fc5\u8981\u3068\u306a\u308b\u3002)<\/p>\n<pre class=\"lang:batch decode:true \" >\r\nrails active_storage:install\r\nrails db:migrate\r\n\r\n<\/pre>\n<p>AWS\u306a\u3069\u3092\u4f7f\u3046\u5834\u5408\u306b\u306f\u3053\u306e\u5f8c\u3001\u8a2d\u5b9a\u304c\u5fc5\u8981\u3060\u304c\u30c7\u30d5\u30a9\u30eb\u30c8\u306e\u30b5\u30fc\u30d0\u306e\u30ed\u30fc\u30ab\u30fc\u30eb\u30b9\u30c8\u30ec\u30fc\u30b8\u306e\u307e\u307e\u4f7f\u7528\u3059\u308b\u3002<\/p>\n<h3>\u30e2\u30c7\u30eb\u8a2d\u5b9a<\/h3>\n<p>\u4efb\u610f\u306e\u30e2\u30c7\u30eb\u3092\u4f5c\u6210\u3059\u308b<br \/>\nrails g model Article title:string<\/p>\n<p>\u4f5c\u6210\u3057\u305f\u30e2\u30c7\u30eb\u306b\u30d5\u30a1\u30a4\u30eb\u30a2\u30c3\u30d7\u30ed\u30fc\u30c9\u7528\u306e\u30d5\u30a3\u30fc\u30eb\u30c9\u3092\u8ffd\u52a0\u3059\u308b\u3002<br \/>\n\"has_one_attached: \u30d5\u30a3\u30fc\u30eb\u30c9\u540d\"\u3067\u5b9a\u7fa9\u3059\u308b\u3002<br \/>\n\u8907\u6570\u306e\u30d5\u30a1\u30a4\u30eb\u3092\u30a2\u30c3\u30d7\u30ed\u30fc\u30c9\u3057\u305f\u3044\u5834\u5408\u306f\u3001has_many_attached\u306b\u3059\u308b\u3002<\/p>\n<pre class=\"lang:ruby decode:true \" >\r\nclass Article &lt; ApplicationRecord\r\n  has_one_attached :title_image\r\nend\r\n<\/pre>\n<p>\u8ffd\u52a0\u5f8c\u306bDB\u306e\u30de\u30a4\u30b0\u30ec\u30fc\u30b7\u30e7\u30f3\u3092\u5b9f\u884c\u3059\u308b\u3002<br \/>\nrails db:migrate<\/p>\n<h3>\u30b3\u30f3\u30c8\u30ed\u30fc\u30e9\u8a2d\u5b9a<\/h3>\n<p>\u30b3\u30f3\u30c8\u30ed\u30fc\u30e9\u3092\u4f5c\u6210\u3059\u308b\u3002<br \/>\nrails g controller Article<\/p>\n<p>\u30b9\u30c8\u30ed\u30f3\u30b0\u30d1\u30e9\u30e1\u30fc\u30bf(article_params)\u306b\u753b\u50cf\u7528\u306e\u30d5\u30a3\u30fc\u30eb\u30c9\u3092\u5fd8\u308c\u305a\u306b\u8ffd\u52a0\u3059\u308b\u4e8b\u3002<br \/>\ndestroy\u3067\u30c7\u30fc\u30bf\u524a\u9664\u6642\u306b\u306f\u3001purge\u3067\u30d5\u30a1\u30a4\u30eb\u81ea\u4f53\u3092\u524a\u9664\u3059\u308b\u3002<br \/>\n\u3042\u3068\u306f\u7279\u6bb5\u610f\u8b58\u305b\u305a\u306b\u3001\u901a\u5e38\u3068\u540c\u3058\u3088\u3046\u306b\u5b9f\u88c5\u3002<\/p>\n<pre class=\"lang:ruby decode:true \" >\r\nclass ArticleEditController &lt; ApplicationController\r\n\r\n  # GET \/article\/new\r\n  def index\r\n    @articles = Article.all\r\n  end\r\n\r\n  # GET \/article\/new\r\n  def new\r\n    @article = Article.new\r\n  end\r\n\r\n  # POST \/article\r\n  def create\r\n    @article = Article.new(article_params)\r\n    if @article.save\r\n      \/\/ \r\n    else\r\n      \/\/ \r\n    end\r\n  end\r\n\r\n  # PATCH\/PUT \/article\/:id\r\n  def update\r\n    if @article.update(article_params)\r\n      \/\/ \r\n    else\r\n      \/\/ \r\n    end\r\n  end\r\n\r\n  # DELETE admin\/article_edit\/1\r\n  def destroy\r\n    @article.title_image.purge if @article.title_image.attached?\r\n    @article.destroy\r\n    \/\/\r\n  end\r\n\r\n  private\r\n\r\n  def article_params\r\n    params.require(:article).permit(:title, :title_image) # \u753b\u50cf\u7528\u306e\u30d5\u30a3\u30fc\u30eb\u30c9\u3082\u8ffd\u52a0\r\n  end\r\nend\r\n\r\n<\/pre>\n<h3>View\u8a2d\u5b9a<\/h3>\n<p>\u30b3\u30f3\u30c8\u30ed\u30fc\u30e9\u306b\u5bfe\u5fdc\u3059\u308b\u30d3\u30e5\u30fc\u3092\u4f5c\u6210\u3059\u308b\u3002<br \/>\n\u65b0\u898f\u4f5c\u6210\u6642\u306eView\u3092\u4e00\u4f8b\u3068\u3057\u3066\u53d6\u308a\u4e0a\u3052\u308b\u3002<\/p>\n<p>attached\u3067\u753b\u50cf\u304c\u4ee5\u524d\u306b\u30a2\u30c3\u30d7\u30ed\u30fc\u30c9\u6e08\u304b\u3069\u3046\u304b\u3092\u5224\u65ad\u53ef\u80fd\u3002<br \/>\n\u30a2\u30c3\u30d7\u30ed\u30fc\u30c9\u6e08\u306e\u5834\u5408\u306fimage_tag\u30d8\u30eb\u30d1\u30fc\u3067\u753b\u50cf\u3092\u8868\u793a\u3059\u308b\u3002<\/p>\n<pre class=\"lang:ruby decode:true \" >\r\n\/\/ views\/article\/new.html.erb\r\n<h1><span id=\"i-4\">\u8a18\u4e8b\u7de8\u96c6(\u65b0\u898f)<\/span><\/h1>\r\n<%= render 'form', article: @article %>\r\n<\/pre>\n<pre class=\"lang:ruby decode:true \" >\r\n\r\n\/\/ views\/article\/_form.html.erb\r\n&lt;%= form_with(model: article, local: true) do |form| %&gt;\r\n\/\/ \u7565\r\n&lt;div class=\"field\"&gt;\r\n    &lt;%= form.label :title %&gt;\r\n    &lt;%= form.text_field :title %&gt;\r\n&lt;\/div&gt;\r\n\r\n&lt;div class=\"field\"&gt;\r\n    &lt;%= form.label :title_image %&gt;\r\n    &lt;%= form.file_field :title_image %&gt;\r\n    \/\/ \u30a2\u30c3\u30d7\u30ed\u30fc\u30c9\u3057\u305f\u753b\u50cf\u304c\u3042\u308c\u3070\u8868\u793a\u3059\u308b\r\n    &lt;%= if article.title_image.attached? %&gt;\r\n       &lt;%= image_tag article.title_image %&gt;\r\n    &lt;% end %&gt;\r\n&lt;\/div&gt;\r\n\r\n&lt;div class=\"actions\"&gt;\r\n    &lt;%= form.submit %&gt;\r\n&lt;\/div&gt;\r\n&lt;% end %&gt;\r\n<\/pre>\n<p>\u4e0b\u8a18\u306e\u3088\u3046\u306b\u4e00\u5ea6\u78ba\u5b9a\u5f8c\u306b\u3001\u518d\u5ea6\u7de8\u96c6\u3092\u884c\u3046\u3068\u4e0b\u8a18\u306e\u3088\u3046\u306b\u4ee5\u524d\u306e\u753b\u50cf\u304c\u8868\u793a\u3055\u308c\u308b\u3002<\/p>\n<p><a href=\"http:\/\/168.138.214.208\/wp-content\/uploads\/2020\/05\/122dfa48109ad4d73a47b5c78de634fa.png\"><img src=\"http:\/\/168.138.214.208\/wp-content\/uploads\/2020\/05\/122dfa48109ad4d73a47b5c78de634fa-300x244.png\" alt=\"\" width=\"300\" height=\"244\" class=\"aligncenter size-medium wp-image-1277\" srcset=\"https:\/\/nobunobu1717.site\/wp-content\/uploads\/2020\/05\/122dfa48109ad4d73a47b5c78de634fa-300x244.png 300w, https:\/\/nobunobu1717.site\/wp-content\/uploads\/2020\/05\/122dfa48109ad4d73a47b5c78de634fa-768x625.png 768w, https:\/\/nobunobu1717.site\/wp-content\/uploads\/2020\/05\/122dfa48109ad4d73a47b5c78de634fa-1024x833.png 1024w, https:\/\/nobunobu1717.site\/wp-content\/uploads\/2020\/05\/122dfa48109ad4d73a47b5c78de634fa.png 1180w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/a><\/p>\n\n\t<p style=\"color:#666;margin-bottom:5px;\">\u30b9\u30dd\u30f3\u30b5\u30fc\u30ea\u30f3\u30af<\/p>\n\t<div class=\"middle-ad\">\n\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\n\n<h3>View\u8a2d\u5b9a(\u30d7\u30ec\u30d3\u30e5\u30fc)<\/h3>\n<p>\u73fe\u5728\u306e\u5b9f\u88c5\u3067\u306f\u78ba\u5b9a\u5f8c\u306e\u753b\u50cf\u3057\u304b\u8868\u793a\u3067\u304d\u306a\u3044\u305f\u3081\u3001\u30d5\u30a1\u30a4\u30eb\u9078\u629e\u5f8c\u306b\u30d7\u30ec\u30d3\u30e5\u30fc\u3067\u304d\u308b\u3088\u3046\u306b\u3059\u308b\u3002<br \/>\n\u30d6\u30e9\u30a6\u30b6\u5074\u3067\u306e\u51e6\u7406\u3068\u306a\u308b\u306e\u3067JS\u5074\u306b\u51e6\u7406\u3092\u8ffd\u52a0\u3059\u308b\u3002<\/p>\n<h4>jQuery\u306e\u8ffd\u52a0<\/h4>\n<p>DOM\u64cd\u4f5c\u3092\u3057\u3084\u3059\u3044\u3088\u3046\u306bjQuery\u3092\u30a4\u30f3\u30b9\u30c8\u30fc\u30eb\u3057\u3066\u4f7f\u3046\u3002<\/p>\n<p>yarn\u3067\u30a4\u30f3\u30b9\u30c8\u30fc\u30eb<br \/>\n<em>yarn add jquery<\/em><\/p>\n<p>js\u3092\u30d0\u30f3\u30c9\u30eb\u3067\u304d\u308b\u3088\u3046\u306b\u8a2d\u5b9a\u3059\u308b\u3002<\/p>\n<p>app\/assets\/javascripts\/application.js<\/p>\n<p>\/\/ \u8ffd\u52a0<br \/>\nrequire('jquery')<\/p>\n<p>webpack\u306b\u8ffd\u52a0<\/p>\n<p>config\/webpack\/environment.js<\/p>\n<pre class=\"lang:js decode:true \" >\r\n\r\nconst { environment } = require('@rails\/webpacker')\r\n\r\n\/\/ \u8ffd\u52a0\r\nconst webpack = require('webpack') \r\n environment.plugins.append('Provide', \r\n   new webpack.ProvidePlugin({ \r\n     $: 'jquery', \r\n     jQuery: 'jquery'\r\n   }) \r\n ) \r\n\r\n module.exports = environment\r\n<\/pre>\n<h4>\u5b9f\u88c5<\/h4>\n<p>\u30d5\u30a1\u30a4\u30eb\u30c0\u30a4\u30a2\u30ed\u30b0\u3067\u753b\u50cf\u9078\u629e\u6642\u306b\u753b\u50cf\u3092\u8ffd\u52a0\u3059\u308b\u51e6\u7406\u3092\u5b9a\u7fa9\u3059\u308b\u3002<br \/>\n\u5148\u307b\u3069\u306e\u30d5\u30a9\u30fc\u30e0\u3092\u7de8\u96c6\u3059\u308b\u3002<\/p>\n<pre class=\"lang:ruby decode:true \" >\r\n\r\n&lt;%= javascript_pack_tag 'article_edit\/_form' %&gt;\r\n&lt;%= form_with(model: article, local: true) do \r\n\r\n&lt;div class=\"field\"&gt;\r\n    &lt;%= form.label :title %&gt;\r\n    &lt;%= form.text_field :title %&gt;\r\n&lt;\/div&gt;\r\n\r\n&lt;div class=\"field image_field\"&gt;\r\n    &lt;%= form.label :title_image %&gt;\r\n    &lt;%= form.file_field :title_image %&gt;\r\n    \/\/ id\u3092\u4ed8\u4e0eimage_preview\r\n    &lt;div id=\"image_preview\"&gt;\r\n    \/\/ \u30a2\u30c3\u30d7\u30ed\u30fc\u30c9\u3057\u305f\u753b\u50cf\u304c\u3042\u308c\u3070\u8868\u793a\u3059\u308b\r\n    &lt;%= if article.title_image.attached? %&gt;\r\n       &lt;%= image_tag article.title_image %&gt;\r\n    &lt;% end %&gt;\r\n    &lt;\/div&gt;\r\n&lt;\/div&gt;\r\n\r\n<div class=\"actions\">\r\n    <%= form.submit %>\r\n<\/div>\r\n\r\n<% end %>\r\n\r\n<\/pre>\n<p> \u4e0b\u8a18\u306e\u3088\u3046\u306ajs\u3092\u5b9a\u7fa9\u3059\u308b\u3002<br \/>\n\u6ce8\u610f\u70b9\u3068\u3057\u3066\u3001\"article_title_image\"\u306f<br \/>\n<%= form.file_field :title_image %><br \/>\n\u3067\u81ea\u52d5\u3067\u4ed8\u4e0e\u3055\u308c\u308bid\u306a\u306e\u3067\u4f7f\u7528\u3059\u308b\u30d5\u30a3\u30fc\u30eb\u30c9\u540d\u306b\u5408\u308f\u305b\u3066\u5909\u66f4\u3059\u308b\u3002<\/p>\n<pre class=\"lang:js decode:true \" >\r\n\r\n$(document).on(\"turbolinks:load\", function () {\r\n  $(\"#article_title_image\").on(\"change\", function (e) {\r\n    var files = e.target.files;\r\n    var d = new $.Deferred().resolve();\r\n    $.each(files, function (i, file) {\r\n      d = d.then(function () {\r\n        return previewImage(file);\r\n      });\r\n    });\r\n  });\r\n\r\n  var previewImage = function (imageFile) {\r\n    var reader = new FileReader();\r\n    var img = new Image();\r\n    var def = $.Deferred();\r\n    reader.onload = function (e) {\r\n      \/\/ \u753b\u50cf\u3092\u8868\u793a\r\n      $(\"#image_preview\").empty();\r\n      $(\"#image_preview\").append(img);\r\n      img.src = e.target.result;\r\n      def.resolve(img);\r\n    };\r\n    reader.readAsDataURL(imageFile);\r\n    return def.promise();\r\n  };\r\n});\r\n\r\n<\/pre>\n<h3>\u305d\u306e\u4ed6<\/h3>\n<h4>\u753b\u50cf\u306e\u30ea\u30b5\u30a4\u30ba<\/h4>\n<p>\u30a2\u30c3\u30d7\u30ed\u30fc\u30c9\u5f8c\u306e\u753b\u50cf\u3092\u305d\u306e\u307e\u307e\u4f7f\u3046\u306e\u3067\u306f\u306a\u304f\u3001\u30ea\u30b5\u30a4\u30ba\u3084\u52a0\u5de5\u3059\u308b\u4e8b\u3082\u53ef\u80fd\u3002<\/p>\n<p>GemFile\u306e\u4e0b\u8a18\u304c\u30c7\u30d5\u30a9\u30eb\u30c8\u3067\u306f\u30b3\u30e1\u30f3\u30c8\u30a2\u30a6\u30c8\u3055\u308c\u3066\u3044\u308b\u306e\u3067\u3001\u5916\u3057\u3066bundle install\u3092\u884c\u3046\u3002<br \/>\n# Use Active Storage variant<br \/>\ngem 'image_processing', '~> 1.2'<\/p>\n<p>ImageMagick\u304c\u30a4\u30f3\u30b9\u30c8\u30fc\u30eb\u3055\u308c\u3066\u3044\u306a\u3044\u74b0\u5883\u3067\u4f7f\u7528\u3059\u308b\u5834\u5408\u3001brew\u3084apt-get\u306a\u3069\u3067\u30a4\u30f3\u30b9\u30c8\u30fc\u30eb\u3057\u3066\u304a\u304f\u3002<\/p>\n<p>\u8868\u793a\u6642\u306bvariant\u30e1\u30bd\u30c3\u30c9\u3092\u547c\u3073\u51fa\u3057\u3066\u3001\u8868\u793a\u30b5\u30a4\u30ba\u306a\u3069\u3092\u6307\u5b9a\u3059\u308b\u4e8b\u3067\u30ea\u30b5\u30a4\u30ba\u5f8c\u306e\u753b\u50cf\u304c\u8868\u793a\u3055\u308c\u307e\u3059\u3002<br \/>\nprocessed\u3092\u3064\u3051\u308b\u4e8b\u3067\u3001\u65e2\u306b\u5909\u63db\u6e08\u306e\u753b\u50cf\u304c\u3042\u308b\u5834\u5408\u306b\u306f\u518d\u5229\u7528\u3059\u308b\u306e\u3067\u30ad\u30e3\u30c3\u30b7\u30e5\u304c\u52b9\u304f\u3088\u3046\u306b\u306a\u308a\u65e9\u304f\u306a\u308a\u307e\u3059\u3002<\/p>\n<p><%= image_tag article.title_image.variant(resize_to_fill: [300, 300]).processed %><\/p>\n<h4>\u30d5\u30a1\u30a4\u30eb\u306e\u524a\u9664<\/h4>\n<p>\u753b\u50cf\u30d5\u30a1\u30a4\u30eb\u306e\u5dee\u3057\u66ff\u3048\u6642\u306a\u3069\u306b\u306f\u524a\u9664\u3055\u308c\u305a\u306b\u30d5\u30a1\u30a4\u30eb\u306f\u6b8b\u308b\u3067\u306e\u4e0b\u8a18\u306e\u51e6\u7406\u3092\u5b9a\u671f\u7684\u306b\u5b9f\u884c\u3059\u308b\u4e8b\u3067\u7d10\u4ed8\u3051\u3067\u304d\u3066\u3044\u306a\u3044\u30d5\u30a1\u30a4\u30eb\u3082\u6d88\u3059\u4e8b\u304c\u53ef\u80fd\u306a\u6a21\u69d8\u3002<br \/>\n (\u307e\u3060\u672a\u691c\u8a3c)<br \/>\nActiveStorage::Blob.unattached.find_each(&:purge)<\/p>\n<h4>\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3<\/h4>\n<p>\u4e0b\u8a18\u306e\u3088\u3046\u306b\u30e2\u30c7\u30eb\u5185\u306b\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\u3092\u5b9f\u65bd\u3059\u308b\u4e8b\u3067\u30d5\u30a1\u30a4\u30eb\u306e\u30c1\u30a7\u30c3\u30af\u3082\u53ef\u80fd\u3002<br \/>\n\u4e0b\u8a18\u306f\u30d5\u30a1\u30a4\u30eb\u30b5\u30a4\u30ba\u306e\u30c1\u30a7\u30c3\u30af\u3092\u5b9f\u65bd\u3002<\/p>\n<pre class=\"lang:ruby decode:true \" >\r\nclass Article &lt; ActiveRecord::Base\r\n  has_one_attached :title_image\r\n  validate :image_size\r\n  \r\n  private\r\n  \r\n  def image_size\r\n    errors.add :image, 'too big' if image.blob.byte_size &gt; 4096\r\n  end\r\nend\r\n\r\n<\/pre>\n\n\t<p style=\"color:#666;margin-bottom:5px;\">\u30b9\u30dd\u30f3\u30b5\u30fc\u30ea\u30f3\u30af<\/p>\n\t<div class=\"middle-ad\">\n\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\n\n<h2><span id=\"i-5\">\u307e\u3068\u3081<\/span><\/h2>\n<p>\u99c6\u3051\u8db3\u3060\u304c\u3001ActiveStorage\u3067\u306e\u30d5\u30a1\u30a4\u30eb\u30a2\u30c3\u30d7\u30ed\u30fc\u30c9\u65b9\u6cd5\u3092\u7d39\u4ecb\u3057\u305f\u3002<br \/>\nDB\u51e6\u7406\u3068\u3057\u3066\u306eActiveRecord\u306f\u3001SQL\u3092\u96a0\u853d\u3059\u308b\u305f\u3081\u72ec\u81ea\u306e\u30eb\u30fc\u30eb\u3092\u591a\u304f\u899a\u3048\u306a\u3044\u3068\u3044\u3051\u306a\u3044\u304c\u3001<br \/>\nActiveStorage\u306f\u30b7\u30f3\u30d7\u30eb\u3067\u30d5\u30a1\u30a4\u30eb\u306e\u30a2\u30c3\u30d7\u30ed\u30fc\u30c9\u64cd\u4f5c\u304c\u4f7f\u3044\u3084\u3059\u304f\u96a0\u853d\u3055\u308c\u3066\u3044\u3066\u7d20\u6674\u3089\u3057\u3044\u3068\u611f\u3058\u307e\u3057\u305f\u3002<\/p>\n<p>\u4e0b\u8a18\u3067\u6280\u8853\u66f8\u534a\u984d\u30bb\u30fc\u30eb\u306e\u5185\u5bb9\u3092\u7d39\u4ecb\u3057\u3066\u3044\u307e\u3059\u306e\u3067\u3001\u8208\u5473\u304c\u3042\u308b\u65b9\u306f\u53c2\u7167\u3057\u3066\u307f\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n<blockquote class=\"wp-embedded-content\" data-secret=\"PGLxuyNKXo\"><p><a href=\"https:\/\/nobunobu1717.site\/?p=1713\">\u30108\/5\u307e\u3067\u3011\u6280\u8853\u66f8\u306e\u96fb\u5b50\u66f8\u7c4d(Kindle)\u304c\u534a\u984d\u4ee5\u4e0b\u306e\u30bb\u30fc\u30eb\u4e2d\u3010\u73fe\u5f79\u30a8\u30f3\u30b8\u30cb\u30a2\u304b\u3089\u898b\u305f\u30aa\u30b9\u30b9\u30e1\u66f8\u7c4d\u3082\u7d39\u4ecb\u3011<\/a><\/p><\/blockquote>\n<p><iframe class=\"wp-embedded-content\" sandbox=\"allow-scripts\" security=\"restricted\" style=\"position: absolute; clip: rect(1px, 1px, 1px, 1px);\" title=\"&#8220;\u30108\/5\u307e\u3067\u3011\u6280\u8853\u66f8\u306e\u96fb\u5b50\u66f8\u7c4d(Kindle)\u304c\u534a\u984d\u4ee5\u4e0b\u306e\u30bb\u30fc\u30eb\u4e2d\u3010\u73fe\u5f79\u30a8\u30f3\u30b8\u30cb\u30a2\u304b\u3089\u898b\u305f\u30aa\u30b9\u30b9\u30e1\u66f8\u7c4d\u3082\u7d39\u4ecb\u3011&#8221; &#8212; nobu blog\" src=\"https:\/\/nobunobu1717.site\/?p=1713&#038;embed=true#?secret=VUQr51Q5Nk#?secret=PGLxuyNKXo\" data-secret=\"PGLxuyNKXo\" width=\"600\" height=\"338\" frameborder=\"0\" marginwidth=\"0\" marginheight=\"0\" scrolling=\"no\"><\/iframe><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Contents0.1 \u6982\u89810.2 \u524d\u63d00.3 \u624b\u98061 \u8a18\u4e8b\u7de8\u96c6(\u65b0\u898f)1.1 \u307e\u3068\u3081 \u6982\u8981 Ruby on Rails\u30675\u304b\u3089\u8ffd\u52a0\u3055\u308c\u305fActiveStorage\u3092\u4f7f\u3063\u305f\u30d5\u30a1\u30a4\u30eb\u30a2\u30c3\u30d7\u30ed\u30fc\u30c9\u6a5f\u80fd\u3092\u5b9f &#8230; <\/p>\n","protected":false},"author":1,"featured_media":1278,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[22,32],"tags":[],"_links":{"self":[{"href":"https:\/\/nobunobu1717.site\/index.php?rest_route=\/wp\/v2\/posts\/1271"}],"collection":[{"href":"https:\/\/nobunobu1717.site\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/nobunobu1717.site\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/nobunobu1717.site\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/nobunobu1717.site\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1271"}],"version-history":[{"count":20,"href":"https:\/\/nobunobu1717.site\/index.php?rest_route=\/wp\/v2\/posts\/1271\/revisions"}],"predecessor-version":[{"id":1749,"href":"https:\/\/nobunobu1717.site\/index.php?rest_route=\/wp\/v2\/posts\/1271\/revisions\/1749"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/nobunobu1717.site\/index.php?rest_route=\/wp\/v2\/media\/1278"}],"wp:attachment":[{"href":"https:\/\/nobunobu1717.site\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1271"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/nobunobu1717.site\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1271"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/nobunobu1717.site\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1271"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}