rails issue with naming convention and table - ruby-on-rails

Question

I have an issue with rails with naming convention.
I have a database where i can't rename table so names are not in plural with inflector.
Today i wanted create model and controller for the table "wishlist__c" and the issue is here. I tried 3 times first by duplicating product model, controller.... and changing name then creating files myself and i still got the issue and then with rails g scaffold wishlist__c
The first error when i try to go to url:8080/wishlist__c/index :
Routing Error
uninitialized constant WishlistCController
wishlist__c_controller.rb exist. I notice after many test that the double '__' is a problem in rails. I rename it to wishlist_c_controller and the same with the model. the error message change to
--Solution: I forget to rename folder wishlist__c to wishlist_c in views folder
Thanks you all ! --
ActiveRecord::RecordNotFound in WishlistCController#show
Couldn't find WishlistC with 'id'=index
the code display under this is from wishlist_c_controller.rb:
def set_wishlist__c
#wishlist__c = ::WishlistC.find(params[:id])
end
How to solve it. I need to link my app to this table
edit:
Model wishlist_c.rb:
class WishlistC < ApplicationRecord
self.table_name = "wishlist__c"
end
wishlist_c_controller:
class WishlistCController < ApplicationController
before_action :set_wishlist__c, only: [:show, :edit, :update, :destroy]
# GET /wishlist__c
# GET /wishlist__c.json
def index
#wishlist__c = WishlistC.all
end
# GET /wishlist__c/1
# GET /wishlist__c/1.json
def show
end
# GET /wishlist__c/new
def new
#wishlist__c = WishlistC.new
end
# GET /wishlist__c/1/edit
def edit
end
# POST /wishlist__c
# POST /wishlist__c.json
def create
#wishlist__c = WishlistC.new(wishlist__c_params)
respond_to do |format|
if #wishlist__c.save
format.html { redirect_to #wishlist__c, notice: 'Wishlist c was successfully created.' }
format.json { render :show, status: :created, location: #wishlist__c }
else
format.html { render :new }
format.json { render json: #wishlist__c.errors, status: :unprocessable_entity }
end
end
end
# PATCH/PUT /wishlist__c/1
# PATCH/PUT /wishlist__c/1.json
def update
respond_to do |format|
if #wishlist__c.update(wishlist__c_params)
format.html { redirect_to #wishlist__c, notice: 'Wishlist c was successfully updated.' }
format.json { render :show, status: :ok, location: #wishlist__c }
else
format.html { render :edit }
format.json { render json: #wishlist__c.errors, status: :unprocessable_entity }
end
end
end
# DELETE /wishlist__c/1
# DELETE /wishlist__c/1.json
def destroy
#wishlist__c.destroy
respond_to do |format|
format.html { redirect_to wishlist__c_index_url, notice: 'Wishlist c was successfully destroyed.' }
format.json { head :no_content }
end
end
private
# Use callbacks to share common setup or constraints between actions.
def set_wishlist__c
#wishlist__c = WishlistC.find(params[:id])
end
# Never trust parameters from the scary internet, only allow the white list through.
def wishlist__c_params
params.fetch(:wishlist__c, {})
end
end

Answer 1

Rails create RESTful routes based on controller and model. One of the routes would be get wishlist__c/:id which gets mapped to action show of WishlistCController. so when you hit the URL wishlist__c/index it takes index as the id.
If you want to render index page, create a route get wishlist__c/index and map it to index method of your controller. For the above to work you must hit the URL url:8080/wishlist__c/1 where 1 is your WishList ID. Replace it with values of id column of wishlist__c table.
Looking at your controller, you already have a route get wishlist__c/ mapped to the index method of your controller. So url:8080/wishlist__c/ should render index page for your model.