Rails 3. Decide on save if the object should be saved or not -

iam is just asking for yourself, what is the best solution to my problem

Here are my models:

  class products & lt; ActiveRecord :: Base is_mind: Prices, class_name = & gt; Accepts for "Product Process": _ Extra_AT_products_: Product product ending in prices & lt; ActiveRecord :: Base is_to: Product Termination   
 Controller  
  Making DIFE @product = Product. New (Param [: Products]) @ Product ... and   
 What do I have to do to prevent all product profiles from being saved when  product_price.value == zero  or  product_price.value == 0.0   
 
  before_save  ProductPrice in the hook.  Return false   will rollback  for the whole transaction, not what I want to do. I just want to "kick" all the values ​​with  value == 0 or value == zero   
  before calculating all the price_images [... ]  and call  Product.new (from params [: product])  It seems that the way of rail is not good ...  
  after the product . New (params [: Products])  Repeat at all prices and remove them from the array. But the argument should be correct in my model? I just do not want to repeat myself to every controller who creates new prices ...   
 Can anyone tell me the best solution for this? Is the railroad way?  
 Thank you!   
 
 
 Do you want it to be called a verification hook, something like this:  < Pre>  class product copy & lt; ActiveRecord :: Base is_to: Product Valid: Price ,: Numerology = & gt; {: Big_this = & gt; 0.0} end   
 Look at other ways that you would like to do it with better control.  
 To avoid adding these invalid values ​​in the first place, you can remove them from hashed attributes such as nested attributes:  
  class product & lt; ActiveRecord :: Base Df self.clean_attributes! (Product_params) product_prices = product_params ['prices'] || [] Product_prices.reject! {| Price | Price ['value'] To_f == 0 Rescue Truth} End-end product. China_tributes! (Param [: Products]) Products. New (Param [: Products])