Controller

class TrainerController < ApplicationController
  before_action :find_card, only: [:review_card]
  def index
    @card = Card.needs_review.first
  end
  def review_card
    correct_answer = @card.check_translation
    if correct_answer
      flash[:notice] =  "Correct"
    else
      flash[:error] = "Incorrect"
    end
    redirect_to trainer_index_path
  end
  private
  def find_card
    @card = Card.find(params[:card_id])
  end
  def trainer_params
    params.permit(:translation)
  end
end