acitvity.php

<?php

class Activity 
{
    
    public static function log(Model $user, Model $subject, $action)
    {
        $log = $this->user->logs()-.>create(['action'] => $action]);
        $log->subject()->save($subject);
    }
    
}

logging_table.php

<?php

class create_logging_table extends Migration
{
    
    public function up()
    {
        Schema::create('activity_logging', function(Blueprint $table)
        {
            $table->increments('id');
            $table->integer('user_id', false);
            $table->morphs('subject');
            $table->string('action');
            $table->timestamps();
        });
    }
    
}