Rails Paperclip Gem Saving Multiple Attachments per Model instance - ruby-on-rails

Question

I'm very new to Rails development and having a problem saving multiple images/attachments to a model. My problem is that the code below is not actually saving to the item_images table when I submit the form. I am following This Article as a guide, though it seems to be a bit out of date. I feel I'm in a little over my head at this point so I hope someone can point out what I'm missing. Thanks!
I have the following models:
item.rb
class Item < ActiveRecord::Base
has_many :item_images, :dependent => :destroy
accepts_nested_attributes_for :item_images, :reject_if => lambda { |t| t['item_image'].nil? }
end
item_image.rb
class ItemImage < ActiveRecord::Base
belongs_to :item
has_attached_file :image,
:styles => { thumb: "100x100#", small: "400x400#", large: "700x700" }
validates_attachment_content_type :image, :content_type => /\Aimage\/.*\Z/
end
My controller looks like this:
items_controller.rb
class ItemsController < ApplicationController
before_action :set_item, only: [:show, :edit, :update, :destroy]
# GET /items
# GET /items.json
def index
#items = Item.all
end
# GET /items/1
# GET /items/1.json
def show
end
# GET /items/new
def new
#item = Item.new
4.times {#item.item_images.build}
end
# GET /items/1/edit
def edit
4.times {#item.item_images.build}
end
# POST /items
# POST /items.json
def create
#item = Item.new(item_params)
respond_to do |format|
if #item.save
format.html { redirect_to #item, notice: 'Item was successfully created.' }
format.json { render :show, status: :created, location: #item }
else
format.html { render :new }
format.json { render json: #item.errors, status: :unprocessable_entity }
end
end
end
# PATCH/PUT /items/1
# PATCH/PUT /items/1.json
def update
respond_to do |format|
if #item.update(item_params)
format.html { redirect_to #item, notice: 'Item was successfully updated.' }
format.json { render :show, status: :ok, location: #item }
else
format.html { render :edit }
format.json { render json: #item.errors, status: :unprocessable_entity }
end
end
end
# DELETE /items/1
# DELETE /items/1.json
def destroy
#item.destroy
respond_to do |format|
format.html { redirect_to items_url, notice: 'Item was successfully destroyed.' }
format.json { head :no_content }
end
end
private
# Use callbacks to share common setup or constraints between actions.
def set_item
#item = Item.find(params[:id])
end
# Never trust parameters from the scary internet, only allow the white list through.
def item_params
params.require(:item).permit(:title, :description, :price, :available, :sort_shop, :sort_gallery, :item_type, :size)
end
end
form.html.erb
<%= form_for #item, html: { multipart: true } do |f| %>
<% if #item.errors.any? %>
<div id="error_explanation">
<h2><%= pluralize(#item.errors.count, "error") %> prohibited this item from being saved:</h2>
<ul>
<% #item.errors.full_messages.each do |message| %>
<li><%= message %></li>
<% end %>
</ul>
</div>
<% end %>
<div class="field">
<%= f.label :title %><br>
<%= f.text_field :title %>
</div>
<div class="field">
<%= f.label :description %><br>
<%= f.text_area :description %>
</div>
<div class="field">
<%= f.label :price %><br>
<%= f.text_field :price %>
</div>
<div class="field">
<%= f.label :available %><br>
<%= f.check_box :available %>
</div>
<div class="field">
<%= f.label :sort_shop %><br>
<%= f.number_field :sort_shop %>
</div>
<div class="field">
<%= f.label :sort_gallery %><br>
<%= f.number_field :sort_gallery %>
</div>
<div class="field">
<%= f.label :item_type %><br>
<%= f.text_field :item_type %>
</div>
<div class="field">
<%= f.label :size %><br>
<%= f.text_field :size %>
</div>
<%= f.fields_for :item_images do |builder| %>
<% if builder.object.new_record? %>
<div class="field">
<%= builder.label :image, "Image File" %>
<%= builder.file_field :image %>
</div>
<% end %>
<% end %>
<div class="actions">
<%= f.submit %>
</div>
<% end %>

Answer 1

Try this in strong parameters in Items controller
params.require(:item).permit(:title, :description, :price, :available, :sort_shop, :sort_gallery, :item_type, :size,item_images_attributes: [:image ])
than in ItemImage.rb add this line
belongs_to :item, optional: true,
and remove this line from Item.rb
:reject_if => lambda { |t| t['item_image'].nil? }
`
If you get any error please reply