My nested relationship is switching the ids of the models - ruby-on-rails

Question

I'm trying to delete an attachment from my rails project. I have the attachment nested under test_suite. When I hit the attachment delete button, the generated url switch the ids of attachment and test_suite. ex. the url should be localhost:3000/test_suites/3/attachments/11 but I'm getting localhost:3000/test_suites/11/attachmnts/3 and I get the error that attachment id=3 doesn't exist which is right because it should be attachment id = 11
Here is how I set it up.
routes.rb:
resources :test_suites do
resources :attachmnts, :only => [:create, :new, :destroy]
end
model/test_suite.rb:
class TestSuite < ApplicationRecord
has_many :attachemnts
end
model/attachment.rb:
class Attachment < ApplicationRecord
belongs_to :test_suite
has_attached_file :attach
validates_attachment_content_type :attach, :content_type => ["text/xml", "text/plain","text/html"]
end
I'm creating new attachment in test_suite show.The attachment will have a test_suite_id attribute.
test_suites_controller.rb:
def show
# create a variable pammed to test_suite with id passed from previous page
#test_suite = TestSuite.find(params[:id])
#attachment = Attachment.new
#attachment.test_suite_id = #test_suite.id
end
test_suite/show.html.erb:
<table class="table table-hover table-responsive">
<thead>
<tr>
<th>File Name</th>
<th>File Type</th>
<th>File Size</th>
<th>Created At</th>
<th></th>
</tr>
</thead>
<tbody>
<%= render partial: 'attachment', locals: {test_suite: #test_suite} %>
</tbody>
</table>
attachments/_attachment.html.erb:
<% test_suite.attachemnts.each do |attachment| %>
<tr>
<td> <%=attachment.attach_file_name %> </td>
<% if attachment.attach_content_type == 'text/plain'%>
<td>txt</td>
<% else %>
<td><%= attchement.attach_content_type.split('/').last %></td>
<% end %>
<td><%= attachement.attach_file_size %></td>
<td><%= attachement.created_at %></td>
<td><%= link_to '<span class="glyphicon glyphicon-remove-sign"></span>'.html_safe, test_suite_attachment_path(attachment),class:"btn btn-lg", method: :delete, data: {confirm: "Are you sure you want to delete the file?"} %>
</td>
</tr>
<% end %>
My rails routes outputs:
Prefix Verb URI Pattern Controller#Action
root GET / test_suites#index
test_suite_attachements POST /test_suites/:test_suite_id/attachements(.:format) attachements#create
new_test_suite_attachement GET /test_suites/:test_suite_id/attachements/new(.:format) attachements#new
test_suite_attachement DELETE /test_suites/:test_suite_id/attachements/:id(.:format) attachements#destroy
test_suites GET /test_suites(.:format) test_suites#index
POST /test_suites(.:format) test_suites#create
new_test_suite GET /test_suites/new(.:format) test_suites#new
edit_test_suite GET /test_suites/:id/edit(.:format) test_suites#edit
test_suite GET /test_suites/:id(.:format) test_suites#show
PATCH /test_suites/:id(.:format) test_suites#update
PUT /test_suites/:id(.:format) test_suites#update
DELETE /test_suites/:id(.:format) test_suites#destroy

Answer 1

When you're dealing with a nested object, you need the ids of both the parent and child object to perform show/edit/update/destroy operations. The issue is because you're not passing the test_suite object to test_suite_attachment_path helper. Modify your link to
<%= link_to '<span class="glyphicon glyphicon-remove-sign"></span>'.html_safe, test_suite_attachement_path(test_suite, attachment),class:"btn btn-lg", method: :delete, data: {confirm: "Are you sure you want to delete the file?"} %>
You can also pass an array of the parent and child objects instead of using the path helper.
#[test_suite, attachment]
<%= link_to '<span class="glyphicon glyphicon-remove-sign"></span>'.html_safe, [test_suite, attachment], class:"btn btn-lg", method: :delete, data: {confirm: "Are you sure you want to delete the file?"} %>
Please use a consistent spelling of 'attachments'. You're using a different version in every place.