Specs failing for api with nested routes - ruby-on-rails

Question

I'm working on adding an api to a ruby on rails todo list project as a learning exercise and I'm having problems testing some specs that use nested routes.
I'd like to show a list of uncompleted tasks when the /lists/1/ endpoint is used, but when I run my specs, there are UrlGenerationErrors and no route matches.
Any thoughts about how I can fix this? Is it a mistake in routes.rb?
FYI, I do have index responding to /user/1/lists and /lists/ so I can also show what lists are owned by a user and what public lists exist across the app. Is this what's confusing the app?
Thanks!
Specs
describe "#show" do
...
context "authorized user is the owner of the list" do
it "returns all uncompleted items" do
params = {list_id: #personal_list.id}
get :show, params
expect(response.status).to eq(200)
#expect(json).to json
end
end
context "authorized user when looking at a nonprivate list" do
it "returns all uncompleted items" do
params = {list_id: #open_list.id}
get :show, params
expect(response.status).to eq(200)
#expect(json).to json
end
end
context "authorized user when looking at a private list" do
it "returns error" do
authWithToken(#api.access_token)
params = {list_id: #private_list.id}
get :show, params
expect(response.status).to eq(400)
end
end
end
Failure Messages
:V1::ListsController#show authorized user is the owner of the list returns all uncompleted items
Failure/Error: get :show, params
ActionController::UrlGenerationError:
No route matches {:list_id=>"1", :controller=>"api/v1/lists", :action=>"show"}
# ./spec/controllers/api/v1/lists_controller_spec.rb:109:in `block (4 levels) in <top (required)>'
2) Api::V1::ListsController#show authorized user when looking at a nonprivate list returns all uncompleted items
Failure/Error: get :show, params
ActionController::UrlGenerationError:
No route matches {:list_id=>"2", :controller=>"api/v1/lists", :action=>"show"}
# ./spec/controllers/api/v1/lists_controller_spec.rb:126:in `block (4 levels) in <top (required)>'
3) Api::V1::ListsController#show authorized user when looking at a private list returns error
Failure/Error: get :show, params
ActionController::UrlGenerationError:
No route matches {:list_id=>"3", :controller=>"api/v1/lists", :action=>"show"}
# ./spec/controllers/api/v1/lists_controller_spec.rb:143:in `block (4 levels) in <top (required)>'
Routes
namespace :api, defaults: {format: 'json'} do
namespace :v1 do
resources :users, except: [:destroy, :new] do
resources :lists, only: [:index]
end
resources :lists, only: [:index, :show, :create, :update, :destroy] do
resources :items, only: [:create, :update, :destroy]
end
resources :items, only: [:destroy]
end
end
Prefix Verb URI Pattern Controller#Action
api_v1_user_lists GET /api/v1/users/:user_id/lists(.:format) api/v1/lists#index {:format=>"json"}
api_v1_users GET /api/v1/users(.:format) api/v1/users#index {:format=>"json"}
POST /api/v1/users(.:format) api/v1/users#create {:format=>"json"}
edit_api_v1_user GET /api/v1/users/:id/edit(.:format) api/v1/users#edit {:format=>"json"}
api_v1_user GET /api/v1/users/:id(.:format) api/v1/users#show {:format=>"json"}
PATCH /api/v1/users/:id(.:format) api/v1/users#update {:format=>"json"}
PUT /api/v1/users/:id(.:format) api/v1/users#update {:format=>"json"}
api_v1_list_items POST /api/v1/lists/:list_id/items(.:format) api/v1/items#create {:format=>"json"}
api_v1_list_item PATCH /api/v1/lists/:list_id/items/:id(.:format) api/v1/items#update {:format=>"json"}
PUT /api/v1/lists/:list_id/items/:id(.:format) api/v1/items#update {:format=>"json"}
DELETE /api/v1/lists/:list_id/items/:id(.:format) api/v1/items#destroy {:format=>"json"}
api_v1_lists GET /api/v1/lists(.:format) api/v1/lists#index {:format=>"json"}
POST /api/v1/lists(.:format) api/v1/lists#create {:format=>"json"}
api_v1_list GET /api/v1/lists/:id(.:format) api/v1/lists#show {:format=>"json"}
PATCH /api/v1/lists/:id(.:format) api/v1/lists#update {:format=>"json"}
PUT /api/v1/lists/:id(.:format) api/v1/lists#update {:format=>"json"}
DELETE /api/v1/lists/:id(.:format) api/v1/lists#destroy {:format=>"json"}
api_v1_item DELETE /api/v1/items/:id(.:format) api/v1/items#destroy {:format=>"json"}
Lists Controller for API
def show
#list = List.find(params[:id])
if (#list.permissions == "open") || (#list.user_id == #authorized_user)
render json: #list.items.completed, each_serializer: ItemSerializer
else
render json: #list.errors, status: :error
end
end

Answer 1

It looks like the problem is that you're sending the param of list_id instead of id.
Default rails routing for #show looks for an :id which is also what you've used (correctly) in your controller.
Try re-writing your tests as follows:
describe "#show" do
...
context "authorized user is the owner of the list" do
it "returns all uncompleted items" do
get :show, :id => #personal_list.id
end
OR
context "authorized user is the owner of the list" do
it "returns all uncompleted items" do
params = {id: #private_list.id}
get :show, params
end
...
end
The other thing to ensure is that you are using the correct top level description. Because this is a controller spec this needs to match the controller name. ie:
describe Api::V1::ListsController do
describe 'show' do