Using Gem 'wicked_pdf' to Generate PDF FIle in Rails

Ok, it ‘s turn for PDF file in Rails.
The wicked_pdf is the best gem I have seen for generating pdf file. It is powerful, versatile and flexible. It also provides the capability of generate PDF from HTML file. This is just what I want.
Thewicked_pdf utilizing the shell utility wkhtmltopdf to serve a PDF file to a user from HTML.
There are also many options which provides huge flexibility to users to customize the output PDF file.

Installation

put it in Gemfile

gem 'wicked_pdf'

Likewise, bundle install. Then, execute the initializer.

$rails generate wicked_pdf

It will create app/config/initializers/wicked_pdf.rb. Normally, nothing has to do with it if higher version of Rails was used. (My Rails version is 5)
Because wicked_pdf is a wrapper for wkhtmltopdf, you’ll need to install that in Gemfile, too.

gem 'wkhtmltopdf-binary'

Of course, then bundle install.

Usage

1.Put the code in the response_tosection of the controller. Like:

def show
  @orderdetails = @order.orderdetails.includes(:model, :size, :color)
  respond_to do |format|
    fn = "order_#{@order.po_number}_#{Time.now.strftime("%Y-%m-%d %H:%M:%S")}"
    format.pdf { render pdf: fn, disposition: 'attachment'}
  end
end

2.Copy the show.html.erb to a new file and rename it as show.pdf.erb.
3. Remove all the link_to tags in the file to prevent them from showing in the pdf file.
It’s done!
Further reading: How To Create PDFs in Rails