ruby on rails 4 - Kaminari paginate return nothing with non-empty data in params? -

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I am installing Mani Kinaburi bus to endorse my rail app I used it like this: 

  & lt;% = paginate @ topic% & gt; & Lt; Div id = "topics" & gt; & Lt;% = Render @ Subject% & gt; & Lt; / Div & gt; In my view,  view / topic / index.html.erb   
      / P> 
  DIF index @top ics = theme.order (Score :: desc). Page (Param [: Page] || 1). (20) End  
 
 Works on page () and per (). 
 
  Partial works of topics , my topics are shown, but nothing is included for the paged instructions. 
 
  & lt;% = paginate @ topics% & gt; Back "" (empty string)!  
 
 What's the problem?

OK, in fact, if you have less than "per (x)" number in db , Then nothing has been shown. I thought that there is always "1" number, but not ...


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