我收到此错误:
无法批量分配受保护的属性:数量
我在网站上查找了有关此问题的所有主题,但找不到可以回答我的问题的内容。以下是代码片段:
产品.rb
class Product < ActiveRecord::Base
attr_accessible :name, :quantities_attributes
has_many :quantities
accepts_nested_attributes_for :quantities, :allow_destroy => :true,
:reject_if => proc { |attrs| attrs.all? { |k, v| v.blank? } }
新的.html.erb
<% if @was_submitted %>
<%= form_for(:new_product_array, :url => products_path) do |f| %>
<% prefix ||= 0 %>
<% @new_product_array.each do |n| %>
<% n.quantities.build %>
<% prefix += 1 %>
<%= f.fields_for(prefix.to_s ) do |child| %>
<div class="field">
<%= child.label :name %><br />
<%= child.text_field :name%>
</div>
<%= render :partial => 'quantities/form',
:locals => {:form => child} %>
<% end %>
<% end %>
<div class="actions">
<%= submit_tag :submit %>
</div>
<% end %>
<% else %>
<%= form_tag new_product_path, :method => 'get' do %>
<p align=center>
How many Items are you Adding? (1-100)
<%= number_field_tag 'amount', 1, :in => 1...100 %>
</br>
To which storage?
<%= number_field_tag 'storage', 1, :in => 1...100 %>
<%= submit_tag "Next", :name => 'submitted' %>
</p>
<% end %>
<% end %>
<%= link_to 'Back', products_path %>
product_controller.rb
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 << 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 => @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
数量.rb
class Quantity < ActiveRecord::Base
belongs_to :product
attr_accessible :amount, :storage
end
数量/_form.html.erb
<%= form.fields_for :quantities do |quant| %>
<div class="field">
<%= quant.label :storage %><br />
<%= quant.number_field :storage %>
</div>
<div class="field">
<%= quant.label :amount %><br />
<%= quant.number_field :amount %>
</div>
<% unless quant.object.nil? || quant.object.new_record? %>
<div class="field">
<%= quant.label :_destroy, 'Remove:' %>
<%= quant.check_box :_destroy %>
</div>
<% end %>
<% end %>
总的来说,我想做的是询问用户要添加多少产品,然后使用用户指定的字段数制作一个表单,并使用一个提交按钮添加所有产品,而当您添加产品时,您还添加了一个数量记录,其中包含有关产品的更多信息。