ruby on rails - How to fix mass-assign protected attributes issue? -


i keep getting error saying can't mass-assign protected attributes: product_id when run code in controller below. i've confirmed @product exist. advice on how fix this?

controller:

@product = product.find(1) = category.new(:category => 'glasses', :product_id => @product.id) a.save  class product < activerecord::base   attr_accessible :blog   has_many :categories end  class category < activerecord::base     attr_accessible :category     belongs_to :product end

writing

@product = product.find(1) @product.categories.create(:category => 'glasses')

is more elegant , should solve problem.


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