ActionController::RoutingError (uninitialized constant CommonWarningsController) - ruby-on-rails

Question

I am coding a Ruby on Rails app (rails 4), on an ubuntu machine.
I have created a new scaffold (model/view/controller) via rails g scaffold common_warnings , and it works just fine on my local machine (localhost:3000/common_warnings resolves to something appropriate), however when I upload this to my server, I get this error:
ActionController::RoutingError (uninitialized constant CommonWarningsController)
when trying to get mydomain.com/common_warnings.
I know that sometimes pluralization is a problem, these are the first lines of each of my controller and model files:
app/controllers/common_warnings_controller.rb
class CommonWarningsController < ApplicationController
app/models/common_warning.rb
class CommonWarning < ActiveRecord::Base
My rails app already has 30something tables in the database, I know I did have this problem a while ago but just can't work out how to fix this one. The pluralization seems to match what I do for loan_histories_controller.rb (also a multi-word name).
The output of rake routes is the same on my local machine and on the server. This is the relevant output:
rake routes | grep common
common_warnings GET /common_warnings(.:format) common_warnings#index
POST /common_warnings(.:format) common_warnings#create
new_common_warning GET /common_warnings/new(.:format) common_warnings#new
edit_common_warning GET /common_warnings/:id/edit(.:format) common_warnings#edit
common_warning GET /common_warnings/:id(.:format) common_warnings#show
PATCH /common_warnings/:id(.:format) common_warnings#update
PUT /common_warnings/:id(.:format) common_warnings#update
DELETE /common_warnings/:id(.:format) common_warnings#destroy
"The server" in this case is provided by AWS
This is my complete common warnings controller:
class CommonWarningsController < ApplicationController
before_action :set_common_warning, only: [:show, :edit, :update, :destroy]
before_action :signed_in_user
before_action :admin_user
# GET /common_warnings
# GET /common_warnings.json
def index
#common_warnings = CommonWarning.all
end
# GET /common_warnings/1
# GET /common_warnings/1.json
def show
end
# GET /common_warnings/new
def new
#new_or_edit = 'new'
#common_warning = CommonWarning.new
end
# GET /common_warnings/1/edit
def edit
#new_or_edit = 'edit'
end
# POST /common_warnings
# POST /common_warnings.json
def create
#common_warning = CommonWarning.new(common_warning_params)
respond_to do |format|
if #common_warning.save
format.html { redirect_to #common_warning, notice: 'Common warning was successfully created.' }
else
format.html { render action: 'new' }
end
end
end
# PATCH/PUT /common_warnings/1
# PATCH/PUT /common_warnings/1.json
def update
respond_to do |format|
if #common_warning.update(common_warning_params)
format.html { redirect_to #common_warning, notice: 'Common warning was successfully updated.' }
else
format.html { render action: 'edit' }
end
end
end
# DELETE /common_warnings/1
# DELETE /common_warnings/1.json
def destroy
#common_warning.destroy
respond_to do |format|
format.html { redirect_to common_warnings_url }
end
end
private
# Use callbacks to share common setup or constraints between actions.
def set_common_warning
#common_warning = CommonWarning.find(params[:id])
end
# Never trust parameters from the scary internet, only allow the white list through.
def common_warning_params
params.require(:common_warning).permit(:name)
end
def signed_in_user
store_location
redirect_to signin_url, notice: "Please sign in." unless signed_in?
end
def admin_user
redirect_to(root_url) unless current_user.admin?
end
end
Thanks in advance!

Answer 1

Fixed. It was a complicated problem to do with having multiple similar but not identical rails apps running from one server. I had forgotten to reset the connection to the schema migrations. Thanks to those who responded!