Pass Uploaded File path To File.read(path)

Question

As you can see from the picture, i have a button to upload a csv file. How can i get the uploaded file to file.read(PATH) so the script takes the file in.

My Controller (calls_controller.rb)

 def index csv_text = File.read(UPLOADED FILE PATH) csv = CSV.parse(csv_text, :headers => true, :encoding => 'ISO-8859-1', :col_sep => ',') ... .. end

I tried to give my index method an argument

 def index(file)

but that did not work for me.

This is my view (index.html.erb). I call out the method in the submit_tag, but can i somehow pass an argument or ?.

<div> <h4>Import data!</h4> <%= form_tag import_calls_path, multipart: true do %> <%= file_field_tag :file, required: true %> <%= submit_tag "Import CSV", method: :index%> <% end %> </div>

Where is the file stored ? You would need to download the file to some path and then provide the path to the file to File.read — Alok Swain
– Alok Swain, Commented Feb 21, 2020 at 12:46
I actually have no idea, i have not changed it anywhere, but if thats the case then il try to find it out :) — BrandoN
– BrandoN, Commented Feb 21, 2020 at 12:54

spickermann · Accepted Answer · 2020-02-21 13:16:34Z

3

When you upload a file with a form like the one in your question then the following should work:

File.read(params[:file].tempfile.path)

Or even simpler:

params[:file].read

answered Feb 21, 2020 at 13:16

spickermann

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2 Comments

BrandoN Over a year ago

csv_text = File.read(params[:file]) Gives me an error "no implicit conversion of nil into String" tried diffrent ways, but non worked. With .read at the end too. Same error

spickermann Over a year ago

How do the request and the params look like in the log file when sending the form?

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