CODEWITHSUNDEEP
ruby-on-railsruby
ETUDESC
ETUDESC

Reputation: 13

Rails Nested Resource (New)

So I have a nested resource, where todolist is the parent and the todoitem is the child. 

resources :todolists do
    resources :todoitems 
end

I have created an Add Todo List link where it invokes new_todolist_todoitem found in routes.rb. 

new_todolist_todoitem GET    /todolists/:todolist_id/todoitems/new(.:format)      todoitems#new

In my todolists/show.html.erb file, I have included this line of code:

<%= link_to 'Add Todo Item', new_todolist_todoitem_path(@todolist.id) %>

And in my todoitems/_form.html.erb, I have also included the nested parameters inside of it:

<%= form_for([@todolist, @todoitem]) do |f| %> --> Error is on this line
    <% if @todoitem.errors.any? %>
<div id="error_explanation">
  <h2><%= pluralize(@todoitem.errors.count, "error") %> prohibited this todoitem from being saved:</h2>

In my todoitems_controller.rb, I put these down for new and create methods:

  # GET /todoitems/new
  def new
    @todoitem = Todoitem.new
  end

  # POST /todoitems
  # POST /todoitems.json
  def create
    @todoitem = @todolist.todoitems.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

The problem is that I keep getting an error stating:

undefined method `todoitems_path' for #<#<Class:0x007feaa79e8da8>:0x007feaa5d0d878>

If anybody has a possible solution to fix this problem or suggestions, it would be greatly appreciated. Thank you!

P.S. According to the stack trace, the Parameters Request is: {"todolist_id"=>"2"}

Upvotes: 0

Views: 223

Answers (2)

Uzbekjon
Uzbekjon

Reputation: 11823

You are not setting @todolist instance variable in your controller code but you are using it in the form_for [@todolist, @todoitem] tag. Make sure you have one set in your controller. Usually it is done in the before_filter like so:

class Todoitem
  before_filter :set_todolist

  def set_todolist
    @totolist = Todolist.find(params[:todolist_id])
  end
end

Upvotes: 1

jdgray
jdgray

Reputation: 1983

A couple things to note about this and hopefully it solves your issue.

In your todolists/show.html.erb, you can just pass the @todolist in your link_to

<%= link_to 'Add Todo Item', new_todolist_todoitem_path(@todolist) %>

Then some changes need to be made to your controller:

todoitems_controller.rb

before_action :set_todolist

def create
  @todoitem = Todoitem.new(todoitem_params)

  # Assuming Todoitem belongs_to Todolist
  @todoitem.todolist_id = @todolist.id
  ...
end

private

def set_todolist
  @todolist = Todolist.find(params[:todolist_id]
end

Make sure your params are correct as well.

Upvotes: 0

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