Form Creating nest objects - ruby-on-rails

Question

I have a nested object issue when creating a new item using forms. When I create a new Item within a form and view I created I get a nil on the Product object when trying to access it.
Here is my structure. I have a class called Item and a class called Product. There could be more than 1 item referring to the same Product.
class CreateItem < ActiveRecord::Migration
def change
create_table :items do |t|
t.integer :product_id
t.string :name
t.text :description
t.timestamps
end
end
end
class CreateProducts < ActiveRecord::Migration
def change
create_table :products do |t|
t.string :name
t.text :description
t.decimal :price
t.string :image_file_name
t.integer :inventory
t.timestamps
end
end
end
class Item< ActiveRecord::Base
belongs_to :product
belongs_to :itemstatus
end
class Product < ActiveRecord::Base
has_one :shop
accepts_nested_attributes_for :item
end
Controller Code:
def create
#item= Item.new(params[:item])
if #item.save
redirect_to #item, notice: "Item successfully created!"
else
render :new
end
end
The problem is happening when I go to show the created item. The Product object is nil. I'm not sure what I should be doing to get the Product Object correctly created and added in this process of creating a new Item.
Can someone help me?
Thanks!

Answer 1

params[:item] must be as the following:
#first example
params[:item] = {product_id: 1}
#second example
product = product.create(name: "", description: "", ..)
params[:item] = {product: product}
#third example
#item.product = product
#or
#item.product_id = params[:item][:product_id]
Try to do that:
#item.new(name: params[:item][:name], product_id: params[:item][:product_id], description: params[:item][:description])
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