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POCan't mass-assign protected attributes: quantities
 

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    <p>I'm getting this error:</p> <blockquote> <p>Can't mass-assign protected attributes: quantities</p> </blockquote> <p>I looked up all the threads concerning this issue in the site, but couldn't find something to answer my problem. Here are the code snippets:</p> <h3>product.rb</h3> <pre><code>class Product &lt; ActiveRecord::Base attr_accessible :name, :quantities_attributes has_many :quantities accepts_nested_attributes_for :quantities, :allow_destroy =&gt; :true, :reject_if =&gt; proc { |attrs| attrs.all? { |k, v| v.blank? } } </code></pre> <h3>new.html.erb</h3> <pre><code>&lt;% if @was_submitted %&gt; &lt;%= form_for(:new_product_array, :url =&gt; products_path) do |f| %&gt; &lt;% prefix ||= 0 %&gt; &lt;% @new_product_array.each do |n| %&gt; &lt;% n.quantities.build %&gt; &lt;% prefix += 1 %&gt; &lt;%= f.fields_for(prefix.to_s ) do |child| %&gt; &lt;div class="field"&gt; &lt;%= child.label :name %&gt;&lt;br /&gt; &lt;%= child.text_field :name%&gt; &lt;/div&gt; &lt;%= render :partial =&gt; 'quantities/form', :locals =&gt; {:form =&gt; child} %&gt; &lt;% end %&gt; &lt;% end %&gt; &lt;div class="actions"&gt; &lt;%= submit_tag :submit %&gt; &lt;/div&gt; &lt;% end %&gt; &lt;% else %&gt; &lt;%= form_tag new_product_path, :method =&gt; 'get' do %&gt; &lt;p align=center&gt; How many Items are you Adding? (1-100) &lt;%= number_field_tag 'amount', 1, :in =&gt; 1...100 %&gt; &lt;/br&gt; To which storage? &lt;%= number_field_tag 'storage', 1, :in =&gt; 1...100 %&gt; &lt;%= submit_tag "Next", :name =&gt; 'submitted' %&gt; &lt;/p&gt; &lt;% end %&gt; &lt;% end %&gt; &lt;%= link_to 'Back', products_path %&gt; </code></pre> <h3>product_controller.rb</h3> <pre><code>def new @product = Product.new if params['submitted'] @was_submitted = true @amount_form = params['amount'] @new_product_array = [] (1..@amount_form.to_i).each do @new_product_array &lt;&lt; Product.new end @storage_form = params['storage'] else @was_submitted = false end respond_to do |format| format.html # new.html.erb format.json { render :json =&gt; @product } end end def create i=0 logger.info params[:new_product_array].inspect params[:new_product_array].each do |new_product| if new_product.last[:name] != nil @new_product_array[i] = Product.new(new_product.last) @new_product_array[i].save i+=1 end end redirect_to(products_path) end </code></pre> <h3>quantity.rb</h3> <pre><code>class Quantity &lt; ActiveRecord::Base belongs_to :product attr_accessible :amount, :storage end </code></pre> <h3>quantity/_form.html.erb</h3> <pre><code>&lt;%= form.fields_for :quantities do |quant| %&gt; &lt;div class="field"&gt; &lt;%= quant.label :storage %&gt;&lt;br /&gt; &lt;%= quant.number_field :storage %&gt; &lt;/div&gt; &lt;div class="field"&gt; &lt;%= quant.label :amount %&gt;&lt;br /&gt; &lt;%= quant.number_field :amount %&gt; &lt;/div&gt; &lt;% unless quant.object.nil? || quant.object.new_record? %&gt; &lt;div class="field"&gt; &lt;%= quant.label :_destroy, 'Remove:' %&gt; &lt;%= quant.check_box :_destroy %&gt; &lt;/div&gt; &lt;% end %&gt; &lt;% end %&gt; </code></pre> <p>Overall what Im trying to do, is ask the user how much products to add, then make a form with the number of fields the user specifies and with one submit button add all of the products, whereas when you add a product you also add a quantity record which holds more information on the product.</p>
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    1. PTQuestion
    1. USAndrew Marshall
    1. USYarneo
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    1. COIs '@was_submitted' there to tell if you are loading new.html.erb? That new controller looks really ugly!
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      1. POCan't mass-assign protected attributes: quantities
      1. USNoah Clark
    2. COStop what you're doing and read this book http://railsantipatterns.com/
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      1. POCan't mass-assign protected attributes: quantities
      1. USPeter Brown
    3. COI'd also recommend Rails 3 in Action!
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      1. POCan't mass-assign protected attributes: quantities
      1. USNoah Clark
 

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