Hello,
I have a form (Rails) which allows me to load a .csv
file using the file_field.
In the view:
<% form_for(:upcsv, :html => {:multipart => true}) do |f| %>
<table>
<tr>
<td><%= f.label("File:") %></td>
<td><%= f.file_field(:filename) %></td>
</tr>
</table>
<%= f.submit("Submit") %>
<% end %>
Clicking Submit redirects me to another page (create.html.erb). The
file was loaded fine, and I was able to read the contents just fine in this second page. I am trying to show the number of lines in the .csv
file in this second page.
My controller (semi-pseudocode):
class UpcsvController < ApplicationController
def index
end
def create
file = params[:upcsv][:filename]
...
#params[:upcsv][:file_length] =
file.length # Show number of lines in the
file
#params[:upcsv][:file_length] =
file.size
...
end
end
Both
file.length and
file.size returns '91' when my
file only contains 7 lines. From the Rails documentation that I read, once the Submit button is clicked, Rails creates a temp
file of the uploaded
file, and the params[:upcsv][:filename] contains the contents of the temp/uploaded
file and not the path to the
file. And I don't know how to extract the number of lines in my original
file. What is the correct way to get the number of lines in the file?
My create.html.erb:
<table>
<tr>
<td>File length:</td>
<td><%= params[:upcsv][:file_length] %></td>
</tr>
</table>
I'm really new at Rails (just started last week), so please bear with my stupid questions.
Thank you!
