Question

I have a simple

@redemption = Redemption.new(params[:redemption])

I need to pass :user_id => current_user.id into this new Redem

I have tried:

 @redemption = Redemption.new(params[:redemption], :user_id => current_user.id)

this doesn’t build the Redemption with a user_id…

Answer 1

params is a Hash, so if you want additional attributes in create, just add them to params, e.g.:

params[:redemption][:user_id] = current_user.id

@redemption = Redemption.new params[:redemption]

Or, if you want to add multiple attributes at once, use Hash#merge, e.g.:

redemption_params = params[:redemption].merge :user_id   => current_user.id,
                                              :some_attr => :foo

@redemption = Redemption.new redemption_params

In this particular case, though, you could probably use a shorter syntax, e.g.:

current_user.redemptions.create params[:redemption]