NoMethodError in Users#show (Ruby Rails) - ruby-on-rails

Question

I'm running into a NoMethodError in my Users#show when trying to include a form partial for submitting a task item (_form.html.erb). My other partial (_item.html.erb) is rendering properly. My item model and my user model are related to each other, user has_many :items, and item belongs_to :user.
Any and all help would be greatly appreciated!
Below is my routes.rb
Rails.application.routes.draw do
get 'welcome/index'
get 'welcome/about'
root 'users#show'
resources :users do
resources :items, only: [:new, :create]
end
devise_for :users
# For details on the DSL available within this file, see http://guides.rubyonrails.org/routing.html
end
Below is my terminal output
ActionView::Template::Error (undefined method `items_path' for #<#<Class:0x007fefeca61dd0>:0x007fefeca58b18>
Did you mean? items_create_path):
1: <h4> Create a new to-do item </h4>
2:
3: <%= form_for #item do |f| %>
4: <%= f.label :name %>
5: <%= f.text_field :name, class: 'form-control', placeholder: "Enter task here" %>
Items Controller
class ItemsController < ApplicationController
def new
#item = Item.new
end
def create
#item = Item.new
#item.user = current_user
#item.name = params[:item][:name]
if #item.save
flash[:notice] = "Item saved"
redirect_to #item
else
flash.now[:alert] = "Item was not created, please try again."
render :new
end
end
end
Users Controller
class UsersController < ApplicationController
def show
if !current_user.nil?
#user = current_user
#item = Item.new
#items = #user.items
else
redirect_to new_user_registration_path
end
end
end
Users#show page
<h2> Your to-do list</h2>
<div class="col-md-8">
<div class='items'>
<%= render partial: "items/item", local: { item: #item} %>
</div>
</div>
<div class="col-md-8">
<div class='new-item'>
<%= render partial: "items/form", local: { item: #item } %>
</div>
</div>

Answer 1

In your routes.rb file, you have items defined as a nested resource. You can check all of your routes by running this command on your terminal: rake routes.
For your routes specifically, you say:
resources :users do
resources :items, only: [:new, :create]
end
This would give you routes for GET /users/:user_id/items/new and POST /users/:user_id/items. However, in your form, it looks like you're trying to do this: <%= form_for #item do |f| %>. You don't have a route defined for an item by itself. You'll need to supply a user as well.
Try this for your form:
<%= form_for [#user, #item] do |f| %>
And something like this in your ItemsController:
class ItemsController
def new
#user = current_user
#item = Item.new
end
end

Answer 2

Your items route is nested under users. therefore you have to pass both to the form_for - a user and an item.
Something like this will probably work:
<%= form_for(current_user, #item) do |f| %>