Reading pdf in rails error "Input must be an IO-like object or a filename error on" -

I am trying to read a PDF file in Rail using Rail Mani. Here's my code

  & lt;% reader = PDF :: Reader.new ('/ uploads / pdf / pdf_1.pdf') putser.pdf_version says putser.info putser.metadata Puts Reader.page_mount% & gt;   
 There is a problem loading the PDF file. Also, I have this url  http: // localhost: 3000 / uploads / pdf / pdf_1.pdf   
 Using this error:    Input should be an IO-like object or file name   
 What is wrong with IDK Any help would be appreciated.   
 
 
 Try to use:  
  Reader = PDF :: Reader.new (rail.root.joint ('upload / pdf / pdf_1 pdf'))   
 And if you want it to appear on the page then you should do something like:  
  & lt;% reader = PDF :: Reader.new (Rails.root.join ('uploads / pdf / pdf_1.pdf'))%> & Lt;% = reader.pdf_version + reader.info + reader.metadata + reader.page_count% & gt;