Ruby on Rails prevent Turbolinks from hijacking AJAX action

问题

I am following along the RoR getting started guide and adding a few things as I go along. Specifically, what I would like to achieve is that in step 5.13 Deleting Articles, I delete an article using AJAX instead of using the standard pattern.

I want to do so in a way that fits in best with the RoR way of doing things. After reading the Working with JavaScript in Rails chapter, the following steps seemed like the way to go:

1. Add property remote: true to the link_to helper (See code snippet A)
2. Disable turbolinks this link_to helper by adding data: {turbolinks: false} (See code snippet A)
3. Add a some logic to the controller that will make sure JSON is returned (see code snippet B).
4. Add JavaScript that listens for the ajax:success events and then animates the item away (see code snippet C).

Snippet A

<td><%= link_to 'Destroy', 
        article_path(article),
        method: :delete,
        data: {turbolinks: false, remote: true},
        :class=> 'remove-article' %></td>

Snippet B

def destroy  
    @article = Article.find(params[:id])

    respond_to do |format|
      if @article.destroy
        format.html { redirect_to articles_path }
        format.json { render json: @article }
      else
        format.html { render action: "index" }
        format.json { render json: @article.errors, status: :unprocessable_entity }
      end
    end

end

Snippet C

(function(){
  $(document).on('turbolinks:load', listenForArticleDelete);

  function listenForArticleDelete() {
    $('a.remove-article').on('ajax:success', function(e, data, status, xhr) {
      // e.preventDefault();
      console.log('DELETE: AJAX SUCCESS', e, '\n', data, '\n', status, '\n', xhr);
    });
  }
})();

This isn't quite working as I expected:

• The turbolinks disabling hasn't worked: it is still replacing the full page content.
• The event ajax:success event is triggered but when I inspect the data property of that event, I see some weird stuff. It seems a textual representation of what Turbolinks is about to do / has just done (?!). Turbolinks.clearCache() Turbolinks.visit("http://localhost:3000/articles", {"action":"replace"})

I am obviously doign this wrong. Can someone please explain to me how I should be doing this? I.e. not just how to get it to work, but also in an idiomatic RoR way?

---

EDIT

I found out which part was the culprit: it was Snippet B because the format.html was being run before the format.json. Simply switching these two fixed the issue:

Revised snippet A:

<!-- Default delete -> format.html -->
<td><%= link_to 'Destroy default', 
        article_path(article),
        method: :delete,
        :class=> 'remove-article' %></td>
<!-- aSync delete -> format.json -->
<td><%= link_to 'Destroy aSync', 
        article_path(article),
        method: :delete,
        remote: true,
        data: {turbolinks: false},
        :class=> 'remove-article' %></td>

Revised snippet B:

def destroy  
    @article = Article.find(params[:id])

    respond_to do |format|
      if @article.destroy
        # Must place json before html, otherwise html will be executed
        format.json { render json: @article }
        format.html { redirect_to articles_path }
      else
        format.json { render json: @article.errors, status: :unprocessable_entity }
        format.html { render action: "index" }
      end
    end

end

回答1:

I would come at this a different way personally.

View: trigger ajax call to delete article

<td><%= link_to 'Destroy default', article, method: :delete, :remote => true, :class=> 'remove-article' %></td>

Controller:

def destroy
    @article.destroy
    respond_to do |format|
        format.js
    end
end

this will process the destroy method and return javascript, by default this will return with the destroy.js.erb file in the relevant directory

destroy.js.erb:

$("#article").slideToggle(300, function(){

    $("#article").remove();

});

FYI: http://api.jquery.com/slidetoggle/

Hope this helps somewhat

回答2:

Try modifying your Snippet A and using no_turbolink: true

Snippet A

<td data-no-turbolink="true"><%= link_to 'Destroy', 
        article_path(article),
        method: :delete,
        data: {no_turbolink: true, remote: true},
        :class=> 'remove-article' %></td>

Resulting link html should have the following code in it:

data-no-turbolink="true"

EDIT: Added data-no-turbolink="true" to the tag, hopefully it helps there, the root of your problem is disabling turbolink, as soon as we achieve it I think you should be good.

Opting out of Turbolink

来源：https://stackoverflow.com/questions/40982356/ruby-on-rails-prevent-turbolinks-from-hijacking-ajax-action