kaminari 未定义的方法`total_pages'

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kaminari 未定义的方法`total_pages'

本文介绍了kaminari 未定义的方法`total_pages'的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！

问题描述

在使用 kaminari 时，我遇到了一个错误.

宝石文件:

# gem 'will_paginate', '~>3.0.6'# gem 'will_paginate-bootstrap'宝石 'kaminari'

lists_controller.rb

 定义索引如果参数[:tag]@lists = List.tagged_with(params[:tag]).order(created_at: :desc).paginate(page:params[:page], per_page: 3 )别的@lists = List.all.order(created_at: :desc)结尾结尾

我也使用 .page params[:page].per(2) 按照 .order(created_at: :desc)但不工作

views/lists/index.html.erb

错误在这里

未定义的方法`total_pages' #提取的源代码(围绕第 26 行):

<div class="容器"><div class="row"><div class="col-md-8">

我正在关注关于 kaminari 的 railscasts 视频，但他们没有任何错误.

解决方案

您需要对两个查询进行分页.我推荐类似的东西:

def 索引如果参数[:tag]@lists = List.tagged_with(params[:tag])别的@lists = List.all结尾@lists = @lists.order(created_at: :desc).paginate(page:params[:page], per_page: 3 )结尾

否则当 params[:tag] 为零时，@lists 将不是分页对象.

While using kaminari, I got an error.

Gemfile:

# gem 'will_paginate', '~> 3.0.6'
# gem 'will_paginate-bootstrap'

gem 'kaminari'

lists_controller.rb

  def index
    if params[:tag]
      @lists = List.tagged_with(params[:tag]).order(created_at: :desc).paginate(page:params[:page], per_page: 3 )
    else
      @lists = List.all.order(created_at: :desc)
    end
  end

I also user .page params[:page].per(2) follow .order(created_at: :desc)but not work

views/lists/index.html.erb

<%= paginate @lists %>

the error is here

undefined method `total_pages' for #<List::ActiveRecord_Relation:0x007fa2303e3fa8>
Extracted source (around line #26):             
    </div>
  </div>
<%= paginate @lists %>
  <div class="container"> 
    <div class="row">
      <div class="col-md-8">

I was following a railscasts video about kaminari, but they did not have any error.

解决方案

You need to paginate both queries. I reccomend something like:

def index
  if params[:tag]
    @lists = List.tagged_with(params[:tag])
  else
    @lists = List.all
  end
  @lists = @lists.order(created_at: :desc).paginate(page:params[:page], per_page: 3 )
end

Otherwise @lists will not be a pagination object when params[:tag] is nil.

这篇关于kaminari 未定义的方法`total_pages'的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！

09-25 18:01