Rails active storage - Download link - ruby-on-rails

Question

I am trying to create a download link with active storage to download whatever files has been uploaded using the
<%= link_to 'download', rails_blob_path(f, disposition: "attachment") %>
But instead it's showing me undefined method filename for #<Order id: 1, paper_size: A4....
How can i fix this??
index.html.erb:
<div class="h1">Admin Dashboard</div>
<table class="table">
<thead>
<tr>
<th scope="col">#</th>
<th scope="col">First</th>
<th scope="col">Last</th>
<th scope="col">Phone</th>
<th scope="col">Email</th>
<th scope="col">Size</th>
<th scope="col">Color</th>
<th scope="col">Type</th>
<th scope="col">Quantity</th>
<th scope="col">Description</th>
<th scope="col">Downloads</th>
</tr>
</thead>
<tbody>
<% #orders.each do |f| %>
<tr>
<th scope="row"><%= f.id %></th>
<td><%= f.first_name %></td>
<td><%= f.last_name %></td>
<td><%= f.phone_number %></td>
<td><%= f.email %></td>
<td><%= f.paper_size %></td>
<td><%= f.color %></td>
<td><%= f.paper_style %></td>
<td><%= f.quantity %></td>
<td><%= f.description %></td>
<% if f.files.attached? %>
<td><%= link_to 'download', rails_blob_path(f, disposition: "attachment") %></td>
<% end %>
<% end %>
</tr>
</tbody>
</table>
According to the tutorials and documentation, it said we need to use the rails_blob_path function to create downloads but when I use it I am getting an error saying 'undefined method filename'.
I am trying to create a download link inside of a table when i use:
<% if f.files.attached? %>
<td><%= link_to 'download', root_url %></td>
<% end %>
It works and redirects me to root path which indicates that f.files.attached? is returning TRUE, but when i call the rails_blob_path function its not working.

Answer 1

You need to pass Active Storage instances to the rails_blob_path path (instead of the Active Record parent object). Since it seems you have multiple files, it should be something like (iterate through all "files" and create a link for each one):
<% f.files.each do |file| %>
<%= link_to 'download', rails_blob_path(file, disposition: "attachment") %>
<% end %>