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Railsでページネーション

前提として、以下のようなモデルを作成済み。

class Sample < ActiveRecord::Migration[5.2]
 def change
  create_table :sample do |t|
   #型            #カラム名
    t.string     :name 
    t.text       :text
    t.timestamps null: true
  end
 end
end

Gemfileに追記
その後、bundle install

gem 'kaminari'

kaminari:pageメソッド
ページネーションにおけるページ数を指定する

kaminari:perメソッド

1ページあたりに表示する件数を示す

class SampleController < ApplicationController
 def index
  @sample = Sample.order("id DESC").page(params[:page]).per(5)
 end
end

ビューファイルの編集

kaminari:paginateメソッド
ページネーションのリンクを表示する

index.html.erb
<div class="content">
 <% @sample.each do |sample| %>
  <%= sample.name %>
 <% end %>
 <%= pagnate(@sample) %>
</div>
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