RSpec reinterprets the action from index to show in view testing - ruby-on-rails

Question

I'm getting the following error for my index view:
1) events/index.html.erb should display all the events in a matrix formation
Failure/Error: render
ActionView::Template::Error:
No route matches {:action=>"show", :controller=>"events", :format=>nil, :id=>nil, :locale=>#<Event id: 2, name: "Miles Eichmann", description: "[\"Voluptas quia velit non est.\", \"Commodi aperiam p...", image: "event.jpg", location: nil, created_at: "2015-08-09 13:55:02", updated_at: "2015-08-09 13:55:02", whenwhen: "2015-09-07 04:00:00", speaker_id: 1, map_address: "800 Rene Levesque, Montreal, H3G 5K4", lon: 0.0, lat: 0.0, price: 3550>} missing required keys: [:id]
The test in spec/views/events/index.html.erb_spec.rb:
require 'rails_helper'
RSpec.describe "events/index.html.erb", :type => :view do
let!(:speaker) { FactoryGirl.create(:speaker) }
let!(:events) { FactoryGirl.create_list(:event, 10, speaker_id: speaker.id ) }
it "should display all the events in a matrix" do
assign(:events, events)
render
puts response
end
end
I don't understand why if I have all the actions pointing to index, the error points to :action=>"show".
If I delete the two let statements or take the ! from them, the test passes and the headers and titles of the index page are displayed (with no events, of course).
The index.html.erb makes a call to helper functions to display the events in a matrix as follows:
<!-- app/views/events/index.html.erb -->
...
<% if Event.future.count == 0 %>
<br><%= t(:staytuned) %>
<% else %>
<h2><%= t(:futureevents).mb_chars.upcase %></h2>
<%= raw(display_matrix_events(Event.future)) %>
<% end %>
...
which is one of the code segments that should be called, as the factory is creating events in the future:
#spec/facories/event.rb
require 'faker'
FactoryGirl.define do
factory :event do
....
the_date { Faker::Date.forward(30) }
....
end
end
The code works fine when running on the browser.
Here is the stack trace:
Failures:
1) events/index.html.erb should display all the events in a matrix
Failure/Error: render
ActionView::Template::Error:
No route matches {:action=>"show", :controller=>"events", :format=>nil, :id=>nil, :locale=>#<Event id: 1, name: "Columbus Goodwin", description: "[\"Quam est officia adipisci.\", \"Molestiae cumque vo...", image: "event.jpg", location: nil, created_at: "2015-08-09 20:22:27", updated_at: "2015-08-09 20:22:27", whenwhen: "2015-09-08 04:00:00", speaker_id: 1, map_address: "800 Rene Levesque, Montreal, H3G 5K4", lon: 0.0, lat: 0.0, price: 3550>} missing required keys: [:id]
# /home/mancilla/.rvm/gems/ruby-2.0.0-p451/gems/actionpack-4.0.4/lib/action_dispatch/journey/formatter.rb:39:in `generate'
# /home/mancilla/.rvm/gems/ruby-2.0.0-p451/gems/actionpack-4.0.4/lib/action_dispatch/routing/route_set.rb:595:in `generate'
# /home/mancilla/.rvm/gems/ruby-2.0.0-p451/gems/actionpack-4.0.4/lib/action_dispatch/routing/route_set.rb:625:in `generate'
# /home/mancilla/.rvm/gems/ruby-2.0.0-p451/gems/actionpack-4.0.4/lib/action_dispatch/routing/route_set.rb:661:in `url_for'
# /home/mancilla/.rvm/gems/ruby-2.0.0-p451/gems/actionpack-4.0.4/lib/action_dispatch/routing/url_for.rb:155:in `url_for'
# /home/mancilla/.rvm/gems/ruby-2.0.0-p451/gems/actionpack-4.0.4/lib/action_view/routing_url_for.rb:83:in `url_for'
# /home/mancilla/.rvm/gems/ruby-2.0.0-p451/gems/turbolinks-2.5.3/lib/turbolinks/xhr_url_for.rb:12:in `url_for_with_xhr_referer'
# /home/mancilla/.rvm/gems/ruby-2.0.0-p451/gems/actionpack-4.0.4/lib/action_dispatch/routing/route_set.rb:228:in `call'
# /home/mancilla/.rvm/gems/ruby-2.0.0-p451/gems/actionpack-4.0.4/lib/action_dispatch/routing/route_set.rb:268:in `block (2 levels) in define_url_helper'
# /home/mancilla/.rvm/gems/ruby-2.0.0-p451/gems/actionpack-4.0.4/lib/action_dispatch/routing/polymorphic_routes.rb:129:in `polymorphic_url'
# /home/mancilla/.rvm/gems/ruby-2.0.0-p451/gems/actionpack-4.0.4/lib/action_dispatch/routing/polymorphic_routes.rb:135:in `polymorphic_path'
# /home/mancilla/.rvm/gems/ruby-2.0.0-p451/gems/actionpack-4.0.4/lib/action_view/routing_url_for.rb:87:in `url_for'
# /home/mancilla/.rvm/gems/ruby-2.0.0-p451/gems/turbolinks-2.5.3/lib/turbolinks/xhr_url_for.rb:12:in `url_for_with_xhr_referer'
# /home/mancilla/.rvm/gems/ruby-2.0.0-p451/gems/actionpack-4.0.4/lib/action_view/helpers/url_helper.rb:180:in `link_to'
# ./app/views/events/_speaker_in_event_index.html.erb:6:in `_app_views_events__speaker_in_event_index_html_erb__148285862205269253_56219800'
# /home/mancilla/.rvm/gems/ruby-2.0.0-p451/gems/actionpack-4.0.4/lib/action_view/template.rb:143:in `block in render'
# /home/mancilla/.rvm/gems/ruby-2.0.0-p451/gems/activesupport-4.0.4/lib/active_support/notifications.rb:159:in `block in instrument'
# /home/mancilla/.rvm/gems/ruby-2.0.0-p451/gems/activesupport-4.0.4/lib/active_support/notifications/instrumenter.rb:20:in `instrument'
# /home/mancilla/.rvm/gems/ruby-2.0.0-p451/gems/activesupport-4.0.4/lib/active_support/notifications.rb:159:in `instrument'
# /home/mancilla/.rvm/gems/ruby-2.0.0-p451/gems/actionpack-4.0.4/lib/action_view/template.rb:141:in `render'
# /home/mancilla/.rvm/gems/ruby-2.0.0-p451/gems/actionpack-4.0.4/lib/action_view/renderer/partial_renderer.rb:306:in `render_partial'
# /home/mancilla/.rvm/gems/ruby-2.0.0-p451/gems/actionpack-4.0.4/lib/action_view/renderer/partial_renderer.rb:279:in `block in render'
# /home/mancilla/.rvm/gems/ruby-2.0.0-p451/gems/actionpack-4.0.4/lib/action_view/renderer/abstract_renderer.rb:38:in `block in instrument'
# /home/mancilla/.rvm/gems/ruby-2.0.0-p451/gems/activesupport-4.0.4/lib/active_support/notifications.rb:159:in `block in instrument'
# /home/mancilla/.rvm/gems/ruby-2.0.0-p451/gems/activesupport-4.0.4/lib/active_support/notifications/instrumenter.rb:20:in `instrument'
# /home/mancilla/.rvm/gems/ruby-2.0.0-p451/gems/activesupport-4.0.4/lib/active_support/notifications.rb:159:in `instrument'
# /home/mancilla/.rvm/gems/ruby-2.0.0-p451/gems/actionpack-4.0.4/lib/action_view/renderer/abstract_renderer.rb:38:in `instrument'
# /home/mancilla/.rvm/gems/ruby-2.0.0-p451/gems/actionpack-4.0.4/lib/action_view/renderer/partial_renderer.rb:278:in `render'
# /home/mancilla/.rvm/gems/ruby-2.0.0-p451/gems/actionpack-4.0.4/lib/action_view/renderer/renderer.rb:47:in `render_partial'
# /home/mancilla/.rvm/gems/ruby-2.0.0-p451/gems/actionpack-4.0.4/lib/action_view/helpers/rendering_helper.rb:27:in `render'
# /home/mancilla/.rvm/gems/ruby-2.0.0-p451/gems/actionpack-4.0.4/lib/action_view/test_case.rb:198:in `render'
# ./app/helpers/events_helper.rb:21:in `display_matrix_events'
# ./app/views/events/index.html.erb:18:in `_app_views_events_index_html_erb__3520103631403717635_53363480'
# /home/mancilla/.rvm/gems/ruby-2.0.0-p451/gems/actionpack-4.0.4/lib/action_view/template.rb:143:in `block in render'
# /home/mancilla/.rvm/gems/ruby-2.0.0-p451/gems/activesupport-4.0.4/lib/active_support/notifications.rb:159:in `block in instrument'
# /home/mancilla/.rvm/gems/ruby-2.0.0-p451/gems/activesupport-4.0.4/lib/active_support/notifications/instrumenter.rb:20:in `instrument'
# /home/mancilla/.rvm/gems/ruby-2.0.0-p451/gems/activesupport-4.0.4/lib/active_support/notifications.rb:159:in `instrument'
# /home/mancilla/.rvm/gems/ruby-2.0.0-p451/gems/actionpack-4.0.4/lib/action_view/template.rb:141:in `render'
# /home/mancilla/.rvm/gems/ruby-2.0.0-p451/gems/actionpack-4.0.4/lib/action_view/renderer/template_renderer.rb:49:in `block (2 levels) in render_template'
# /home/mancilla/.rvm/gems/ruby-2.0.0-p451/gems/actionpack-4.0.4/lib/action_view/renderer/abstract_renderer.rb:38:in `block in instrument'
# /home/mancilla/.rvm/gems/ruby-2.0.0-p451/gems/activesupport-4.0.4/lib/active_support/notifications.rb:159:in `block in instrument'
# /home/mancilla/.rvm/gems/ruby-2.0.0-p451/gems/activesupport-4.0.4/lib/active_support/notifications/instrumenter.rb:20:in `instrument'
# /home/mancilla/.rvm/gems/ruby-2.0.0-p451/gems/activesupport-4.0.4/lib/active_support/notifications.rb:159:in `instrument'
# /home/mancilla/.rvm/gems/ruby-2.0.0-p451/gems/actionpack-4.0.4/lib/action_view/renderer/abstract_renderer.rb:38:in `instrument'
# /home/mancilla/.rvm/gems/ruby-2.0.0-p451/gems/actionpack-4.0.4/lib/action_view/renderer/template_renderer.rb:48:in `block in render_template'
# /home/mancilla/.rvm/gems/ruby-2.0.0-p451/gems/actionpack-4.0.4/lib/action_view/renderer/template_renderer.rb:56:in `render_with_layout'
# /home/mancilla/.rvm/gems/ruby-2.0.0-p451/gems/actionpack-4.0.4/lib/action_view/renderer/template_renderer.rb:47:in `render_template'
# /home/mancilla/.rvm/gems/ruby-2.0.0-p451/gems/actionpack-4.0.4/lib/action_view/renderer/template_renderer.rb:17:in `render'
# /home/mancilla/.rvm/gems/ruby-2.0.0-p451/gems/actionpack-4.0.4/lib/action_view/renderer/renderer.rb:42:in `render_template'
# /home/mancilla/.rvm/gems/ruby-2.0.0-p451/gems/actionpack-4.0.4/lib/action_view/renderer/renderer.rb:23:in `render'
# /home/mancilla/.rvm/gems/ruby-2.0.0-p451/gems/actionpack-4.0.4/lib/action_view/helpers/rendering_helper.rb:24:in `render'
# /home/mancilla/.rvm/gems/ruby-2.0.0-p451/gems/actionpack-4.0.4/lib/action_view/test_case.rb:198:in `render'
# /home/mancilla/.rvm/gems/ruby-2.0.0-p451/gems/actionpack-4.0.4/lib/action_view/test_case.rb:118:in `render'
# ./spec/views/events/index.html.erb_spec.rb:28:in `block (2 levels) in <top (required)>'
Finished in 2.11 seconds (files took 3.79 seconds to load)
1 example, 1 failure
Failed examples:
rspec ./spec/views/events/index.html.erb_spec.rb:10 # events/index.html.erb should display all the events in a matrix formation

Answer 1

The action index is executed correctly but it has a sequence of renders and method calls which lead to a show action.
The app/views/events/index.html.erb file has a call to a method which renders a partial containing the line
<%= link_to image_tag(e.speaker.image.to_s, width: '150%'), e %>
RSpec interprets e in the link_to as is (i.e. an event object) instead of using its id to build the actual link as Rails does.
Changing e to e.id throws the error:
undefined method `model_name' for Fixnum:Class
in both the browser and RSpec.
Deleting this line make the tests pass, but of course, gives the wrong output.