在 rails 中创建下一页的链接 [英] Create a link for next page in rails

问题描述

我在 rails 应用程序中使用 Twilio API 向用户显示他们的录音列表.假设一个用户总共有 11 个录音，我每页显示 3 个.

I'm using the Twilio API in a rails app to show a user a list of their recordings. Say a user has 11 recordings total, and I'm showing them 3 per page.

twilio_controller.rb

twilio_controller.rb

def calls

@user = current_user
@account_sid = @user.twilio_account_sid
@auth_token = @user.twilio_auth_token
@page_size = 3
@page = params[:page_id] || 0
@sub_account_client = Twilio::REST::Client.new(@account_sid, @auth_token)
@subaccount = @sub_account_client.account
@recordings = @subaccount.recordings
@recordingslist = @recordings.list({:page_size => @page_size, :page => @page})

end

calls.html.erb

calls.html.erb

<% @recordingslist.each do |recording| %>
 <tr>
  <td><%= recording.sid %></td>
 </tr>
<% end %>

<%= link_to "Next Page", twilio_calls_path(@page + 1) %>

routes.rb

#twilio routes

 post 'twilio/callhandler'

 get 'twilio/calls'

 match 'twilio/calls' => 'twilio#page', :as => :twilio_page # Allow `recordings/page` to return the first page of results
 match 'twilio/calls/:page_id' => 'twilio#page', :as => :twilio_page

分页信息内置于 Twilio 响应中，使得

Paging info is built into the Twilio response such that

@recordingslist.next_page

给我接下来的 3 个录音(在 rails 控制台中验证).如何链接到该链接，以便当用户单击链接时，表格会加载接下来的 3 个结果?

gives me the next 3 recordings (verified in rails console). How do I link to that so that when a user clicks the link, the table loads the next 3 results?

谢谢！

推荐答案

我建议使用 twilio-ruby 附带的分页功能.根据文档:

I would recommend utilizing the paging functionality that ships with twilio-ruby. According to the docs:

ListResource.list() 接受分页参数.

ListResource.list() accepts paging arguments.

首先为您的 Twilio 列表视图创建一个路由.确保您可以传递 page_id 参数 - 这就是您的控制器操作将知道要呈现哪个页面的方式:

Start by create a route for your Twilio list view. Make sure you can pass a page_id parameter – this is how your controller action will know which page to render:

# config/routes.rb
match 'recordings/page/:page_id' => 'twilio#page', :as => :twilio_page
match 'recordings/page' => 'twilio#page', :as => :twilio_page # Allow `recordings/page` to return the first page of results

然后，在page动作中，拉取page_id参数(如果没有page_id<，则设置if为1/code>，并将 page_number 和 page_size 作为参数传递给 @recordings.list:

Then, in the page action, pull the page_id parameter (or set if to 1 if there is no page_id, and pass the page_number and page_size as arguments to @recordings.list:

# app/controllers/twilio_controller.rb
def page
    page_size = 3
    @page = params[:page_id] || 1
    @sub_account_client = Twilio::REST::Client.new(@account_sid, @auth_token)
    @subaccount = @sub_account_client.account
    @recordings = @subaccount.recordings
    @recordingslist = @recordings.list({:page_size => page_size, :page => page)})
end

最后，在您的视图中，将页码传递给 link_helper 中的 twilio_page_path – 只需确保相应地调整页码 (+1 表示下一页，-1 表示上一页:

Finally, in your view, pass the page number to twilio_page_path in your link_helper – just make sure to adjust the page number accordingly (+1 for the next page, -1 for the previous page:

# view
<%= link_to "Next Page", twilio_page_path(@page.to_i + 1) %>
<%= link_to "Previous Page", twilio_page_path(@page.to_i - 1) %>

请注意，如果您位于列表的开头或结尾，您可能会无意中传递无效的 page_id.因此，您可能希望在您的 page 控制器操作中实现一些异常处理:

Note that – if you're at the start or end of your list – you may inadvertently end up passing an invalid page_id. Therefore, you may want to implement some exception handling in your page controller action:

# app/controllers/twilio_controller.rb
def page
    begin
        @page = params[:page_id] || 1 # If `page_id` is valid
    rescue Exception => e
        @page = 1 # If `page_id` is invalid
    end
    # Remaining logic...
end

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