Wicked-PDF not showing images, 'wicked_pdf_image_tag' undefined
I want to generate a PDF with our department logo in it. When I try to use the WickedPdf class in my controller (using the method described at https://github.com/mileszs/wicked_pdf):
def some_action
image_tag_string = image_tag('logo.jpg')
pdf = WickedPdf.new.pdf_from_string(image_tag_string)
save_path = Rails.root.join('testpdfs','logotest.pdf')
File.open(save_path, 'wb') do |file|
file << pdf
end
end
...the application saves the PDF to the target directory, but it has a blue-and-white '?' mark where the image should be.
If I do this instead:
image_tag_string = wicked_pdf_image_tag('logo.jpg')
pdf = WickedPdf.new.pdf_from_string(image_tag_string)
I get the following error:
NoMethodError:
undefined method `wicked_pdf_image_tag' for #<...
It would appear that my Rails app is also missing / not linking to a helper file belonging to the wicked-pdf gem.
Answers to similar questions on StackOverflow recommend writing a custom "image-tag" helper to locate the image or installing wkhtmltopdf. For me, image-tag shows the logo just fine when placed in a View (whatever.html.erb). "logo.jpg" is already located in both the asset pipeline and #{RailsRoot}/public/images. Finally, I am using wkhtmltopdf 0.9.9, wicked-pdf 0.11.0, and rails 4 on Ubuntu 14.04.
In a nutshell - what am I doing wrong that causes WickedPDF to fail to render the image?
Answer
First thing create a pdf template to render and use your wicked_pdf tags in that template.. for example-
app/views/layout/application.pdf.erb-
<!doctype html>
<html>
<head>
<meta charset='utf-8' />
</head>
<body onload='number_pages'>
<div id="content">
<%= yield %>
</div>
</body>
</html>
app/views/pdf/pdf_view.pdf.erb-
<div>
<%= wicked_pdf_image_tag 'logo.jpg' %>
</div>
use this template instead
def save
pdf = WickedPdf.new.pdf_from_string(
render_to_string(
template: 'example/pdf_view.pdf.erb',
layout: 'layouts/application.pdf.erb'))
send_data(pdf,
filename: 'file_name.pdf',
type: 'application/pdf',
disposition: 'attachment')
end
This might help you..