ruby-on-rails – 使用没有活动记录的will_paginate

发布时间：2020-12-17 03:47:36 所属栏目：百科来源：网络整理

导读：主持人：应用程序/主持人/ games_presenter.rb class GamesPresenter attr_reader :games,:next_page,:previous_page def initialize json @games = json['machine-games'] paging = json['paging'] if paging paging['next'] next_page_query = paging['ne

主持人：

应用程序/主持人/ games_presenter.rb

class GamesPresenter

  attr_reader :games,:next_page,:previous_page

  def initialize json
    @games = json['machine-games']

    paging = json['paging']
    if paging && paging['next']
      next_page_query = paging['next'].match(/?.*/)[0]
      @next_page = "/machine_games/search#{next_page_query}"
    end

    if paging && paging['previous']
      previous_page_query = paging['previous'].match(/?.*/)[0]
      @previous_page = "/machine_games/search#{previous_page_query}"
    end
  end

end

控制器动作：

def show
  # ...
  @presenter = GamesPresenter.new(json)
end

观点：

<% @presenter.games.each do |game| %>
  ...
<% end %>

<%= link_to "Previous",@presenter.previous_page %>
<%= link_to "Next",@presenter.next_page %>

并且为了告诉Rails加载apps / presenters /目录以及models /,controllers /,views /等,将其添加到config / application.rb：

config.after_initialize do |app|
  app.config.paths.add 'app/presenters',:eager_load => true
end

我想知道如何在上述情况下使用will_paginate？ .谢谢.

解决方法

假设@presenter.games是一个数组,试试这个：

# Gemfile

gem 'will_paginate'


# /config/initializers/will_paginate_array.rb

require 'will_paginate/collection'

Array.class_eval do
  def paginate(page = 1,per_page = 15)
    page = 1 if page.blank? # To fix weird params[:page] = nil problem
    WillPaginate::Collection.create(page,per_page,size) do |pager|
      pager.replace self[pager.offset,pager.per_page].to_a
    end
  end
end


# /app/controllers/games_controller.rb

def show
  @presenter = GamesPresenter.new(json)
  @games = @presenter.games.paginate(params[:page],5)
end


# /app/views/games/index.html.erb

<% @games.each do |game| %>
  ...
<% end %>

<%= will_paginate @games %>

这基本上将.paginate方法添加到所有数组.有关此问题的更多文档可在https://github.com/mislav/will_paginate/blob/master/lib/will_paginate/collection.rb找到

（编辑：李大同）

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