It works! Kinda. This is some terrifying code, but it will give you method suggestions on the error you received in your rails code using the rails inflector.

application_controller.rb

class ApplicationController < ActionController::Base
  # Prevent CSRF attacks by raising an exception.
  # For APIs, you may want to use :null_session instead.
  protect_from_forgery with: :exception


  rescue_from NoMethodError, with: :try_to_inflect


  def try_to_inflect(err)
    error_class = err.class
    method_name = err.message.scan(/`(.*)'/).first.first
    method_pieces = method_name.split('_')
    method_suggestions = map_map(method_pieces) do |arr, item, index|
      myarr = arr.dup
      if item.pluralize == item
        myarr[index] = item.singularize
      else
        myarr[index] = item.pluralize
      end
      myarr
    end.map { |i| i.join('_') }
    new_error = error_class.new("Cannot find '#{method_name}' Perhaps you meant? \n #{method_suggestions}")
    new_error.set_backtrace(err.backtrace)
    raise new_error
  end

  private
  def map_map(arr, &block)
    arrs = []
    arr.each_with_index do |item, index|
      arrs.push(block.call(arr, item, index))
    end
    arrs
  end
end