So I have a MVC where I am trying to create a nested resource of todolist and todoitems. In my routes.rb file, I have done
resources :todolists do
resources :todoitems
end
In my todolists/show.html.erbfile, I have added an Add Todo Item link:
<%= link_to 'Add Todo Item', new_todolist_todoitem_path(@todolist) %> <-- THIS IS THE CAUSE OF THE ERROR
When I looked up the URL of the 'Add Todo Item', the URL gave me http://localhost:3000/todolists/2/todoitems/new, which is correct.
In my rake routes I have this:
todolist_todoitems GET /todolists/:todolist_id/todoitems(.:format) todoitems#index
POST /todolists/:todolist_id/todoitems(.:format) todoitems#create
new_todolist_todoitem GET /todolists/:todolist_id/todoitems/new(.:format) todoitems#new
edit_todolist_todoitem GET /todolists/:todolist_id/todoitems/:id/edit(.:format) todoitems#edit
todolist_todoitem GET /todolists/:todolist_id/todoitems/:id(.:format) todoitems#show
PATCH /todolists/:todolist_id/todoitems/:id(.:format) todoitems#update
PUT /todolists/:todolist_id/todoitems/:id(.:format) todoitems#update
DELETE /todolists/:todolist_id/todoitems/:id(.:format) todoitems#destroy
And in my todoitems_controller.rb file I have this:
class TodoitemsController < ApplicationController
before_action :set_todoitem, only: [:show, :edit, :update, :destroy]
before_action :set_todolist
# GET /todoitems
# GET /todoitems.json
def index
# @todoitems = Todoitem.all
end
# GET /todoitems/1
# GET /todoitems/1.json
def show
end
# GET /todoitems/new
def new
@todoitem = Todoitem.new
end
# GET /todoitems/1/edit
def edit
end
# POST /todoitems
# POST /todoitems.json
def create
@todoitem = Todoitem.new(todoitem_params)
respond_to do |format|
if @todoitem.save
format.html { redirect_to @todoitem, notice: 'Todoitem was successfully created.' }
format.json { render :show, status: :created, location: @todoitem }
else
format.html { render :new }
format.json { render json: @todoitem.errors, status: :unprocessable_entity }
end
end
end
# PATCH/PUT /todoitems/1
# PATCH/PUT /todoitems/1.json
def update
respond_to do |format|
if @todoitem.update(todoitem_params)
format.html { redirect_to @todoitem, notice: 'Todoitem was successfully updated.' }
format.json { render :show, status: :ok, location: @todoitem }
else
format.html { render :edit }
format.json { render json: @todoitem.errors, status: :unprocessable_entity }
end
end
end
# DELETE /todoitems/1
# DELETE /todoitems/1.json
def destroy
@todoitem.destroy
respond_to do |format|
format.html { redirect_to todoitems_url, notice: 'Todoitem was successfully destroyed.' }
format.json { head :no_content }
end
end
private
# Use callbacks to share common setup or constraints between actions.
def set_todoitem
@todoitem = Todoitem.find(params[:id])
end
def set_todolist
@todolist = Todolist.find(params[:todolist_id])
end
# Never trust parameters from the scary internet, only allow the white list through.
def todoitem_params
params.require(:todoitem).permit(:due_date, :task_title, :description, :done, :todolist_id)
end
end
However, when I run the entire code, I get an error saying that in todoitems/_form.html.erb, First argument in form cannot contain nil or be empty.
<%= form_for(@todoitem) do |f| %> <-- ERROR IS HERE
<% if @todoitem.errors.any? %>
<div id="error_explanation">
<h2><%= pluralize(@todoitem.errors.count, "error") %> prohibited this todoitem from being saved:</h2>
<ul>
I have tried to understand why it is not working and I know that this help page is long, but any suggestions in how to fix this will be greatly appreciated!
