Combine PDF files with Prawn

Question

I am having a problem with the combination of several PDF files.

I am generating the PDF using PrawnPDF on the "show" action.

I would like to be able to combine multiple selected items into a single PDF.

I am trying to solve it this way using the combine_pdf geam

def nested_jobs_multiply_pdf
    pdf_file_paths  = params[:items]
    pdf_file_paths  = pdf_file_paths.map! do |x|
      x.to_s + ".pdf"
    end

@pdfForms = CombinePDF.new
pdf_file_paths.each do |x|
  @pdfForms << CombinePDF.parse(nested_job_path(x, format: "pdf"))
end
@pdfForms.save "combined.pdf"

    flash[:notice] = "Combined PDF successful"
    redirect_to nested_jobs_path
  end

Unfortunately, I am getting an error

RuntimeError in NestedJobsController#nested_jobs_multiply_pdf
Unknown PDF parsing error - malformed PDF file?

Extracted source (around line #89):
87   @pdfForms = CombinePDF.new
88    pdf_file_paths.each do |x|
89    @pdfForms << CombinePDF.parse(nested_job_path(x, format: "pdf"))
90   end
91  @pdfForms.save "combined.pdf"
92

dp7 dp7 · Accepted Answer · 2016-10-09T18:44:35

Try if this works:

pdf_file_paths.each do |path|
  @pdfForms << CombinePDF.load(path) #path is relative path to pdf file stored locally like path/to/801.pdf
end

Combine PDF files with Prawn

1 Answers