Mongoid/Rails 4 Documents not found error - ruby-on-rails

Question

Im trying to use the alternative of "foreign keys", embedded_in and embeds_many in rails 4. I'm sure there is a way round this and its making sense to me so far
My Models:
class Line
include Mongoid::Document
include Mongoid::Timestamps
embeds_many :stations
field :line, type: String
index({ starred: 1 })
end
class Station
include Mongoid::Document
include Mongoid::Timestamps
has_many :routes
embedded_in :line, inverse_of: :stations
field :name, type: String
end
Now I'm able to create a nested route such as:
http://localhost:3000/lines/:line_id/stations
with:
Rails.application.routes.draw do
resources :lines do
resources :stations
end
resources :routes
root 'lines#index'
end
My Stations Controller:
class StationsController < ApplicationController
before_action :load_line
before_action :set_station, only: [:show, :edit, :update, :destroy]
# GET /stations
# GET /stations.json
def index
#stations = #line.stations
end
# GET /stations/1
# GET /stations/1.json
def show
end
# GET /stations/new
def new
#station = #line.stations.build
end
# GET /stations/1/edit
def edit
end
# POST /stations
# POST /stations.json
def create
#station = #line.stations.build(station_params)
respond_to do |format|
if #station.save
format.html { redirect_to #station, notice: 'Station was successfully created.' }
format.json { render :show, status: :created, location: #station }
else
format.html { render :new }
format.json { render json: #station.errors, status: :unprocessable_entity }
end
end
end
# PATCH/PUT /stations/1
# PATCH/PUT /stations/1.json
def update
respond_to do |format|
if #station.update_attributes(station_params)
format.html { redirect_to #station, notice: 'Station was successfully updated.' }
format.json { render :show, status: :ok, location: #station }
else
format.html { render :edit }
format.json { render json: #station.errors, status: :unprocessable_entity }
end
end
end
# DELETE /stations/1
# DELETE /stations/1.json
def destroy
#station.destroy
respond_to do |format|
format.html { redirect_to stations_url, notice: 'Station was successfully destroyed.' }
format.json { head :no_content }
end
end
private
# Use callbacks to share common setup or constraints between actions.
def set_station
#station = #line.stations.find(params[:id])
end
# Never trust parameters from the scary internet, only allow the white list through.
def station_params
params.require(:station).permit(:name)
end
def load_line
#line = Line.find(params[:line_id])
end
end
but when I visit the route I get:
message: Document(s) not found for class Line with id(s) :line_id. summary: When calling Line.find with an id or array of ids, each parameter must match a document in the database or this error will be raised. The search was for the id(s): :line_id ... (1 total) and the following ids were not found: :line_id. resolution: Search for an id that is in the database or set the Mongoid.raise_not_found_error configuration option to false, which will cause a nil to be returned instead of raising this error when searching for a single id, or only the matched documents when searching for multiples.

Answer 1

In your browser don't type http://localhost:3000/lines/:line_id/stations but http://localhost:3000/lines/1/stations !
If your routes.rb doesn't have the following you shoudl add it.
resources :lines do
resources :stations
end
PS: Please indent with two specs, they are common practice amongst ruby programmers.