[RUBY] Questions about implementing the Like feature (Ajax) in Rails

Overview

Ajax processing doesn't work well when creating a portfolio and implementing likes using Ajax This article https://qiita.com/naota7118/items/e009eff939b5a764672d#%E4%BB%8A%E5%9B%9E%E8%8B%A6%E5%8A%B4%E3%81%97%E3%81%9F%E3%81%A8%E3%81%93%E3%82%8D I read and solved it. But, As you can see in this article

<%= button_to question_like_path(question, id: question.likes[0].id), class:"btn btn-primary like", method: :delete , remote:true do %>

I didn't understand why this code works with the destroy action that removes my likes (id: question.likes [0] .id erases the 0th like of likes linked to the question without asking questions, so I thought I couldn't guarantee to erase my likes? T)

I twisted my head and understood it, so I will leave it as a memorandum.

Conclusion

Because the like to be deleted on the destroy action side is find_by with current_user

  def destroy
    @like = @question.likes.find_by(user_id: current_user.id)
    @like.destroy
    #Root for the time being until Ajax is implemented later
    respond_to do |format|
      format.html { redirect_to @like.question || root_url}
      format.js
    end
  end

question_like_pathAlthough the question and like to be deleted are required as arguments Since URL cannot be generated unless like is specified, likes [0] is used instead. However, the like user to be erased uses the `` `current_user``` method. It doesn't matter here because it is obtained by find_by in the destroy action.

I was deceived by the appearance. .. ..