Uninitialized Constant in Namespace Controllers - ruby-on-rails

Question

I haven't had noobie routing errors in a while, but now that I'm using a namespace I don't seem to understand how to trace them...
uninitialized constant ShiftedCommerce::BaseItemsController::Item
So what exactly is this saying? There's no Item model associated with the BaseItemsController within my namespace?
I don't know why there's a trailing ::item, I don't think it should be there.
Another reason I think something strange is going on is because if I change ANYTHING in the BaseItemController, the page will render once. Then If I reload the page, the same error comes back up. It's extremely frustrating.
Here is my BaseItemControlller
class ShiftedCommerce::BaseItemsController < ApplicationController
before_action :set_base_item, only: [:show, :edit, :update, :destroy]
# GET /items
# GET /items.json
def index
#base_items = BaseItem.all
#line_item = LineItem.new
#cart = current_cart
#title = "Store"
end
# GET /items/1
# GET /items/1.json
def show
#cart = current_cart
#line_item = LineItem.new
end
# GET /items/new
def new
#base_item = BaseItem.new
end
and my model...
class ShiftedCommerce::BaseItem < ActiveRecord::Base
has_many :line_items, :through => :items
has_many :items
has_many :sizes, :through => :items
has_many :colors, :through => :items
before_destroy :ensure_not_referenced_by_any_line_item
validates :price, :numericality => {:greater_than_or_equal_to => 0.01}
validates :title, :uniqueness => true
def one_record_of_variance
self
end
def has_no_variance
end
def is_base_item?
return true if self.class.name == "BaseItem"
end
def is_item?
return true if self.class.name == "Item"
end
private
# ensure that there are no line items referencing this product
def ensure_not_referenced_by_any_line_item
if line_items.empty?
return true
else
errors.add(:base, 'Line Items present')
return false
end
end
end
Here are my paths:
App/controllers/shifted_commerce/base_items_controller.rb
App/models/shifted_commerce/models/base_item.rb