A controller action invokes the update or creation of a record, while having a private method to set the strong params for that object's class, which is different from the originating class.

  def userdiscount
    articlediscount_params = params[:articlediscount]
    initialise_article_and_params(articlediscount_params)
puts articlediscount_params
    if articlediscount_params[:id].present?
      @articlediscount = Articlediscount.find(articlediscount_params[:id].to_i)
      @articlediscount.update!(articlediscount_params)
    else
      @articlediscount = Articlediscount.create!(articlediscount_params)
    end
  end

    def articlediscount_params
      params.require(:articlediscount).permit(:article_id, :user_id, :discounted_price, :discount, :shop_id)
    end

The strong params definition is identical to the one in the articlediscounts controller

Why then are tests complaining about the attributes? removing the require element of the statement does not modify the error

ActiveModel::ForbiddenAttributesError: ActiveModel::ForbiddenAttributesError

CodePudding user response：

The main problem is this line:

articlediscount_params = params[:articlediscount]

The problem is that you now have two objects in this controller called articlediscount_params - this variable and the method that's actually doing your strong-params filtering. Remove the variable definition and you should find that your code works more as you expect.