No route matches {:action=>"show", :controller=>"items"} missing required keys: [:id] - ruby-on-rails

Question

Update: I've been trying to debug my files, so most of the files have changed recently
I am getting a strange error when trying to use a "new" action to my items_controller. Essentially, a wishlist has_many items and an item belongs_to wishlist. The error message is as follows:
Code
Here is my items_controller:
class ItemsController < ApplicationController
def show
#item = Item.find(params[:id])
end
def new
#item = Item.new
end
def create
#item = Item.new(item_params)
if #item.save
redirect_to "/wishlist", :notice => "Success!"
else
redirect_to "/wishlist", :notice => "Failure, try again later!"
end
end
def edit
#item = Item.find(params[:id])
end
def update
#item = Item.find(params[:id])
if #item.update_attributes(item_params)
redirect_to(:action => 'show', :id => #item.id)
else
render 'edit'
end
end
private
def item_params
params.require(:item).permit(:name,:size,:qty,:priority)
end
private
def create_params
params.require(:item).permit(:name,:size,:qty,:priority,:wishlist_id)
end
end
And my routes.rb:
Rails.application.routes.draw do
get '/wishlist' => 'wishlists#index', as: :wishlists
get '/wishlist/:id' => 'wishlists#show', as: :wishlist
get '/wishlist_items/new' => 'items#new'
get '/wishlist_items/:id' => 'items#show', as: :items
get '/wishlist_items/:id/edit' => 'items#edit', as: :edit_items
patch '/wishlist_items/:id' => 'items#update'
resources :items
And finally, my new.html.erb for the items model:
<h1>New Item</h1>
<div class="wishlist-new">
<% if true %>
<%= form_for(#item) do |f| %>
<%= f.text_field :name, :placeholder => "Name" %>
<%= f.text_field :size, :placeholder => "Specifications" %>
<%= f.text_field :qty, :placeholder => "Quantity" %>
<%= f.text_field :priority, :placeholder => "Priority" %>
<%= f.text_field :id, :placeholder => "Wishlist ID" %> # changing :id to :wishlist_id doesn't seem to do anything
<%= f.submit "Create Item", class: "btn-submit" %>
<% end %>
<% end %>
</div>
My migration files (so you know how my databases are structured:
# Migration file for items
class CreateItems < ActiveRecord::Migration
def change
drop_table :items
create_table :items do |t|
t.string :name
t.string :size
t.string :qty
t.integer :priority
t.references :wishlist
t.timestamps
end
end
end
# Migration File for Wishlists
class CreateWishlists < ActiveRecord::Migration
def change
drop_table :wishlists
create_table :wishlists do |t|
t.string :title
t.timestamps
end
end
end
Attempts to Debug
It seems like the routes.rb is sending requests to different methods in the items_controller because the error seems to say that /wishlist_items/new is accessing a show method even though its new method takes priority. To support this, the page loads properly when I comment out get '/wishlist_items/:id' => 'items#show', as: :items in the routes file. What happens is the page loads properly, and the Item is created properly (when I fill out the form) except that when I go into the console, it says that the Item created has a property of wishlist_id: nil even though I specified for it to be 1 in the form.
The method mentioned above has two problems: (1) it doesn't work entirely correctly, and (2) it becomes impossible to show a specific Item in the wishlist.
The error occurs before the inner section of the form_for is loaded, so the problem either is (a) a weird routing thing (as mentioned above) or (b) something weird happening to the #item variable.
Thanks in advance!