How can add additional Attribute in my JSON response with dynamic value in laravel

Question

In my app i have a Posts and a Reacts table both are connected with relationship.

In App user can react to a post(like or dislike) and for retrieve this i'm using this function :

public function feed()
{
    $posts=Post::with('user')
                ->with('reacts')
                ->withCount('comments')
                ->orderBy('created_at', 'DESC')
                ->get();
    return response()->json(["posts" => $posts]);
}

the response is:

i want to add one more field in Posts Object for isUserLiked and if the current authenticated user liked the post then value will be true or false for him something like this:

i can add a additional field but how can i set the value dynamically for that

this is what i am doing in my Post Model:

 protected $appends = ['isUserLiked'];
 public function getIsUserLikedAttribute($id)
 {
    $react=React::where('user_id',auth()->user()->id)->where('post_id',$id)->exists();
    return $react;
 }

this is returning false because i don't know any way to pass the arguments(Post id). is there any better way i can get the desired response? Thanks!

If you have a relationship between Post and React, you could simplify that to $this->react->where("user_id", "=", auth()->user()->id)->exists(); — Tim Lewis
– Tim Lewis, Commented Jul 19, 2019 at 20:02

Fabián Montero Rodríguez · Accepted Answer · 2019-07-19 20:55:35Z

1

public function getIsUserLikedAttribute($id)
 {
    return React::where('user_id',auth()->user()->id)->where('post_id',$this->id)->exists();

 }

answered Jul 19, 2019 at 20:55

Fabián Montero Rodríguez

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Amin Bakhtiari Far · Accepted Answer · 2020-06-07 07:07:47Z

1

In your user model:

public function reacts(){
   return $this->hasMany(React::class);
}

public function scopeReactOnPost($query, $post_id){
   return $this->reacts()->where(function($query) use ($post_id){
      $query->where('post_id',$post_id);
   });
}

and in your controller:

$user->reactOnPost($post_id)->first();

or

$user->reactOnPost($post_id)->get()->count();

Will let you know if user had any reaction on the specified post. and for adding this to your json output you can artisan make a resource for your post model. Laravel Resources

edited Jun 7, 2020 at 7:07

answered Jul 20, 2019 at 0:48

Amin Bakhtiari Far

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