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RubyOnRails 画像サイズの指定方法

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#「refile」「refile-mini_magick」をインストールする
投稿フォーム等で得た画像データをリサイズすることができる機能を持っています。Gemfileにてインストールを実行。

Gemfileに記述
gem "refile", require: "refile/rails", github: 'manfe/refile'
gem "refile-mini_magick"

#サイズ指定の実例

①サイズ指定のみ

<%= attachment_image_tag post_image, :image ,size:'100x100'%>

②サイズ指定+写真が無い場合のfallback設定

  <%= attachment_image_tag book.user, :profile_image, :fill, 100, 100, format: 'jpeg', fallback: "no_image.jpg", size:'100x100'  %>

③少し変わったバージョンでのサイズ指定(()の中にsize指定記述を入れる)

<%= image_tag('sample-author1.jpg',size:'100x100') %>
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