ruby on rails - ActionController::UrlGenerationError - with route defined and action in controller, still getting error for no route -

i'm getting following error in rspec when running schools_controller_spec.rb test:

actioncontroller::urlgenerationerror: no route matches {:action=>"show", :controller=>"schools"} 

what's puzzling me have routes configured, , action defined in appropriate controller. i'm not getting error other tests in spec, such 'get #index', etc. running rails 4.2 rspec/capybara.

here's routes.rb:

rails.application.routes.draw   root to: 'pages#home', id: 'home'   resources :users   resources :schools   resource :session, only: [:new, :create, :destroy]   match '/home',      to: 'pages#home', via: 'get', as: 'home_page' end 

rake routes returns:

    schools    /schools(.:format)          schools#index             post   /schools(.:format)          schools#create  new_school    /schools/new(.:format)      schools#new edit_school    /schools/:id/edit(.:format) schools#edit      school    /schools/:id(.:format)      schools#show             patch  /schools/:id(.:format)      schools#update             put    /schools/:id(.:format)      schools#update             delete /schools/:id(.:format)      schools#destroy 

there's route defined on fifth line, schools#show.

the schools_controller.rb:

class schoolscontroller < applicationcontroller   before_action :require_signin   before_filter :admin_only, except: :index, :show    def index     @schools = school.all   end    def show    # code pending   end    private      def admin_only       unless current_user.admin?         redirect_to :back, alert: "access denied."       end     end end 

the link individual school seems defined in view helper (_school.html.haml):

%li#schools   = link_to school.name, school   = school.short_name   = school.city   = school.state 

and looking @ front-end html confirms it's working correctly. can see, example: <a href="/schools/1">community college of air force</a>. when click link page shows following in debug dump:

--- !ruby/hash:actioncontroller::parameters controller: schools action: show id: '1' 

finally, measure, here's spec file (schools_controller_spec.rb):

require 'rails_helper'  describe schoolscontroller, type: :controller   # specs omitted other actions    describe 'get #show'     context "when not signed in"       "returns 302 redirect code"         :show         expect(response.status).to eq 302       end        "redirects signin page"         :show         expect(response).to redirect_to new_session_path       end     end      context "when signed in user"       before :each         @user = double(:user)         allow(controller).to receive(:current_user).and_return @user         @school = create(:school)       end        "assigns school @school variable"         :show         expect(assigns(:school)).to eq @school       end     end   end end 

the route appears in rake routes. method defined in appropriate controller. there don't appear silly naming errors (e.g. plural/singular). spec doesn't appear have issues routing #index or other routes example. works exactly expected in browser.

so why keep getting "no route matches" error when run controller spec?

this because show action expecting id aren't passing. replace:

get :show 

with this:

get :show, id: school.id 

the above assumes have school variable, perhaps let in before block?

let(:school) { create(:school) }