nakaearth

module UserDecorator
  def short_name
    name[0, 5]
  end
  # 以下のメソッドはUserモデルにもある。この状態でView側でcreated_atを使おうとすると
  # SystemStackErrorが発生する
  def created_at
    created_at.strftime("%Y-%m-%d %H:%M")
  end
end

nakaearth

<p id="notice"><%= notice %></p>

<p>
  <strong>Name:</strong>
  <%= @user.name %>(<%= @user.short_name %>)
</p>

<p>
  <strong>Age:</strong>
  <%= @user.age %>

nakaearth

<h1>Listing users</h1>

<table>
  <thead>
    <tr>
      <th>Name</th>
      <th>Age</th>
      <th>Description</th>
      <th colspan="3"></th>
    </tr>

nakaearth

<p id="notice"><%= notice %></p>

<p>
  <strong>Name:</strong>
  <%= @user.name %>(<%= @user.short_name %>)
</p>

<p>
  <strong>Age:</strong>
  <%= @user.age %>

nakaearth

<h1>Listing users</h1>

<table>
  <thead>
    <tr>
      <th>Name</th>
      <th>Age</th>
      <th colspan="3"></th>
    </tr>
  </thead>

nakaearth

module UserDecorator
  def short_name
    name[0, 5]
  end
end

nakaearth

module UserDecorator
end

nakaearth

class UserDecorator < Draper::Decorator
  delegate_all
  decorates_finders

  def short_name
    object.name[0, 5]
  end
end

nakaearth

Draper::CollectionDecorator.delegate :current_page, :total_pages, :limit_value, :total_count

nakaearth

def show
  @user = UserDecorator.find(params[:id])
end