javascript - Like Unlike 切换按钮与 jQuery 的 AJAX

Question

目标: 我正在尝试创建一个按钮，允许用户为网站上的帖子点赞(类似于 Facebook 的做法)，这也会增加/减少点赞的数量除了按钮之外。

问题:除一种极端情况外，一切正常。如果用户已经喜欢该帖子，他可以不喜欢它但不再喜欢它。似乎喜欢/不喜欢切换不起作用，浏览器只是向服务器发送“不喜欢”请求。如果用户以前从未喜欢过该图像，则喜欢/不喜欢切换似乎工作得很好。

我利用帖子的数据属性通过对这些属性进行操作来切换喜欢/不喜欢请求。我目前通过 Laravel 框架使用 PHP，并使用 jQuery 进行前端操作。下面是我的代码示例。

favorite.js 文件

$(function(){

    $('.favorite-button').click(function(){
        var $this=$(this);
        var post_id=$this.data('postId');

        $.ajaxSetup({
                headers: {
                    'X-CSRF-TOKEN': $('meta[name="csrf-token"]').attr('content')
                }
        });



        if($this.data('favoriteId')){
            //decrement the favorite count
            count=$this.siblings('.favorite-count');
            count.html(parseInt(count.html())-1);

            //send ajax request
            var fav_id=$this.data('favoriteId');
            $this.removeData('favoriteId');
            $.ajax({
                url:'/post/'+post_id+'/favorite/'+fav_id,
                type:'DELETE',
                success: function(result){
                    console.log('post was unfavorited');
                },
                error: function(){
                    console.log('error: did not favorite the post.');
                }
            });
        }


        else{
            //update the favorite count
            count=$this.siblings('.favorite-count');
            count.html(parseInt(count.html())+1);

            //send ajax post request
            $.ajax({
                url:'/post/'+post_id+'/favorite',
                type:'POST',
                success: function(result){
                    //update the data attributes
                    $this.data('favoriteId',result['id']);
                    console.log(result);
                    console.log('post was favorited');

                },
                error: function(){
                    console.log('error: did not favorite the post.');
                }
            });
        }
    });
});

HTML 文件

<div class="pull-right">
    <span class="marginer">
        @if(Auth::guest() || $post->favorites->where('user_id',Auth::user()->id)->isEmpty())
            <i  data-post-id="{{ $post->id }}" class="fa fa-heart fa-lg favorite-button"></i>
        @else
            <i  data-favorite-id="{{ Auth::user()->favorites()->where('post_id',$post->id)->first()->id }}" data-post-id="{{ $post->id }}" class="fa fa-heart fa-lg favorite-button"></i>
        @endif

        <span class="favorite-count">{{ $post->favorites->count() }}</span>
    </span>
</div>

除了解决我的问题之外，如果您认为我不符合此任务的最佳实践，请发表评论。我想听听您的意见。

Answer 1

与其尝试使用 jQuery，不如尝试尽可能简化“喜欢/不喜欢/喜欢/计数”的操作

• 避免从 blade 模板查询，只将数据发送到 View

下面是我将如何解决这个问题而不是让 jQuery 做繁重的工作

HTML/渲染

    <button  class='likebutton' data-identifier='1' data-state='liked'>Like</button>
<button class='favoritebutton' data-identifier='1' data-state='favorited'>Favorite</button>
<span class='count counts-1'>123</span>

Blade

<button  class='likebutton' data-identifier='{{!! Post->ID !!}' data-state='{{!! /*<something to see if user liked this>*/?'liked':'unliked' !!}'>{{!! <something to see if user liked>?'liked':'unliked' !!}</button>
<button class='favoritebutton' data-identifier='{{!! Post->ID !!}' data-state='{{!! /*<something to see if user liked>*/?'favorited':'notfavorited' !!}'>{{!! <something to see if user liked>?'favorited':'notfavorited' !!}</button>
<span class='count counts-{{!! $Post->ID !!}}'>{!! $Post->totallikes !!}</span>

JS

$.ajaxSetup({headers: {'X-CSRF-TOKEN': $('meta[name="csrf-token"]').attr('content')}});

function UserLike(_event){
var state = $(_event.target).data('state');
var postID = parseInt($(_event.target).data('identifier'));
console.log('Status => '+$(_event.target).data('state'));
  $.post('/posts/metadata/likes',{
    'postID':postID
  },function(res){
    $(_event.target).data('state',res.state);
    $(_event.target).text(res.text);
    $('.counts-'+postID).text(res.totallikes);
  }).fail(function(){
    /* do something on fail */
  });
}
function UserFavorite(_event){
var postID = parseInt($(_event.target).data('identifier'));
  $.post('/user/metadata/favorites',{
    'postID':postID
  },function(res){
    $(_event.target).data('state',res.state);
    $(_event.target).text(res.text);
  }).fail(function(){
    /* do something on fail */
  });
}

$("body").on('click','.likebutton',function(_event){    UserLike(_event);   });
$("body").on('click','.favoritebutton',function(_event){    UserFavorite(_event);   });

PHP

// Routes

Route::post('/posts/metadata/likes',function(){
    // auth check
    // handle state/likes
    // ex. response
    // response with json {'state':notliked,'text':'<translated string>','postID':1}
});

Route::post('/user/metadata/favorites',function(){
    // auth check
    // handle state/favorites
    // response with json {'state':favorited,'text':'<translated string>,'postID':1}
});