read and get content from tempfile .xlsx

Question

I am using dropzone to send an .xlsx file to my controller, that sends me the file by parameters and I get an <ActionDispatch::Http::UploadedFile:0x007fe9f87bb030

In my controller I am trying to receive and read it but it does not work

def update_activities_with_excel
    file = params[:file].tempfile
    File.open(file, 'r') do |file|

    end
end

file prints:

#<File:/tmp/RackMultipart20190731-16696-1khug2d.xlsx>

My parameters:

Parameters: {
"file"=>#<ActionDispatch::Http::UploadedFile:0x007fe9f87bb030 
@tempfile=#<Tempfile:/tmp/RackMultipart20190731-16696-1khug2d.xlsx>, 
@original_filename="Actividades.xlsx", 
@content_type="application/vnd.openxmlformats-officedocument.spreadsheetml.sheet", 
@headers="Content-Disposition: form-data; name=\"file\"; 
filename=\"Actividades.xlsx\"\r\n
Content-Type: application/vnd.openxmlformats-officedocument.spreadsheetml.sheet\r\n">}

I need to get its content to process it, I am using the axlsx gem

Answer 1

I found the solution using the creek gem

file = params[:file]
creek = Creek::Book.new file.tempfile