How to set values of nested parameters in Rails 4 from controller method?

问题

I have request model and nested model filled_cartridges when I create new request object i also need to set the values of nested params inside create controller method. I have many nested params so i need to iterate through them, something like that:

params[:request][:filled_cartridges_attributes].each do |_,value|
  # here i try to set :client_id parameter, which is nested
  # where @client.id is defined
    value[:client_id] = @client.id # i am pretty sure that the problem is here
  # is it a correct way of ding that?

end

EDIT:

has_many :filled_cartridges, inverse_of: :request, dependent: :destroy
	accepts_nested_attributes_for :filled_cartridges, reject_if: proc { |attributes| attributes['title'].blank? },allow_destroy: true

and my nested model:

   create_table :filled_cartridges do |t|
	t.integer :client_id, null: false
        t.string :cartridge_name, null: false
	t.integer :cartridge_id, null: false
	t.integer :request_id, null: false
	t.integer :count, default: 1
	t.datetime :fill_date
        t.timestamps null: false
    end

here client_id,request_id and cartridge_id are all should should be set inside controller. And my strong params:

def request_params
  params.require(:request).permit(:name, :address, :phone, :mobile,:date,
 :filled_cartridges_attributes => [:client_id,:cartridge_name,:cartridge_id,
				:request_id,:count,:fill_date,:_destroy,:id],

end

来源：https://stackoverflow.com/questions/29901150/how-to-set-values-of-nested-parameters-in-rails-4-from-controller-method