Using BaseTrait instead of BaseModel?

Actually I have a BaseModel which cares about storing created_by stuff and some getters and setters for usernames, checkbox values etc.

For several reasons I want to change that code to one or more Traits.

I try to create one BaseTrait which cares for the public static function boot() and a ModelAttributesTrait which cares for the getters and setters of attributes.

Everytime when I shift all the setter and getters to ModelAttributesTrait, I'll get a problem to Login into the system. The error is that my user has been deleted, which in fact is not true. I'l use toddish/verify package for Auth.

So, here is my original Base Model:

<?php

use Carbon\Carbon;

class BaseModel extends Eloquent {

    // Select the dateformat to show in all views
    protected $dateformat = 'adminpanel.dateformat.date_short_time_short';
   
    // Functions to use while booting this class
    public static function boot()
    {
        parent::boot();

        // Save values for created_by and updated_by while creating Object
        static::creating(function($model)
        {   
            if (Auth::check())
            {
                $model->created_by = Auth::user()->id;
                $model->updated_by = Auth::user()->id;
            }
            else
            {
                $model->created_by = 0;
                $model->updated_by = 0;             
            }
        });

        // Save value for updated_by while updating Object
        static::updating(function($model)
        {
            if (Auth::check())
            {
                $model->updated_by = Auth::user()->id;
            }
            else
            {
                $model->updated_by = 0;             
            }
        });

        // Save value for deleted_by while soft-deleting Object
        static::deleting(function($model)
        {
            if (Auth::check())
            {
                $model->deleted_by = Auth::user()->id;
                $model->save();
            }
            else
            {
                $model->updated_by = 0; 
                $model->save();   
            }
        });   

    }

    // Show readable created_at value
    public function getCreatedAtAttribute($attr)
    {   
        return Carbon::parse($attr)->formatLocalized(''.trans($this->dateformat).'');
    }

    // Show readable updated_at value
    public function getUpdatedAtAttribute($attr)
    {        
        return Carbon::parse($attr)->formatLocalized(''.trans($this->dateformat).'');
    } 

    // Show readable deleted_at value
    public function getDeletedAtAttribute($attr)
    {        
        return Carbon::parse($attr)->formatLocalized(''.trans($this->dateformat).'');
    } 

    public function getLastLoginAttribute($attr)
    {   
        if ($attr != '0000-00-00 00:00:00')
        {
            return Carbon::parse($attr)->formatLocalized(''.trans($this->dateformat).'');
        }
        else
        {
            return '';
        }
    }

    // Show readable created_by value
    public function getCreatedByAttribute($attr)
    {   
        if ($attr)
        {
            return User::findOrFail($attr)->username;
        }
        else
        {
            return 'SYSTEM';
        } 
    }  

    // Show readable updated_by value
    public function getUpdatedByAttribute($attr)
    {   
        if ($attr)
        {
            return User::findOrFail($attr)->username;
        }
        else
        {
            return 'SYSTEM';
        } 
    } 

    // Show readable deleted_by value
    public function getDeletedByAttribute($attr)
    {   
        if ($attr)
        {
            return User::findOrFail($attr)->username;
        }
        else
        {
            return 'SYSTEM';
        } 
    } 

    // Show readable active value
    public static function getActiveAttribute($attr)
    {   
        if ($attr)
        {
            return trans('adminpanel.activestates.'.$attr);
        }
        else
        {
            return trans('adminpanel.activestates.0');
        } 
    } 

}

My new BaseTrait:

<?php namespace Acme\Traits;

use Carbon\Carbon;

trait BaseTrait {

    // Select the dateformat to show in all views
    protected $dateformat = 'adminpanel.dateformat.date_short_time_short';
   
    // Functions to use while booting this class
    public static function boot()
    {
        parent::boot();

        // Save values for created_by and updated_by while creating Object
        static::creating(function($model)
        {   
            if (\Auth::check())
            {
                $model->created_by = \Auth::user()->id;
                $model->updated_by = \Auth::user()->id;
            }
            else
            {
                $model->created_by = 0;
                $model->updated_by = 0;             
            }
        });

        // Save value for updated_by while updating Object
        static::updating(function($model)
        {
            if (\Auth::check())
            {
                $model->updated_by = \Auth::user()->id;
            }
            else
            {
                $model->updated_by = 0;             
            }
        });

        // Save value for deleted_by while soft-deleting Object
        static::deleting(function($model)
        {
            if (\Auth::check())
            {
                $model->deleted_by = \Auth::user()->id;
                $model->save();
            }
            else
            {
                $model->updated_by = 0; 
                $model->save();   
            }
        });   

    }

}

And finally, the try to my ModelAttributesTrait, which seems to cause this problem:

<?php namespace Acme\Traits;

trait ModelAttributesTrait {

    /**
     * Get the actionfields attributes for the model.
     *
     * @return array
     */
    public function getActionfields()
    {
        return $this->actionfields;
    }

    /**
     * Get the properties attributes for the model.
     *
     * @return array
     */
    public function getProperties()
    {
        return $this->properties;
    }

    // Show readable created_at value
    public function getCreatedAtAttribute($attr)
    {   
        return Carbon::parse($attr)->formatLocalized(''.trans($this->dateformat).'');
    }

    // Show readable updated_at value
    public function getUpdatedAtAttribute($attr)
    {        
        return Carbon::parse($attr)->formatLocalized(''.trans($this->dateformat).'');
    } 

    // Show readable deleted_at value
    public function getDeletedAtAttribute($attr)
    {        
        return Carbon::parse($attr)->formatLocalized(''.trans($this->dateformat).'');
    } 

    public function getLastLoginAttribute($attr)
    {   
        if ($attr != '0000-00-00 00:00:00')
        {
            return Carbon::parse($attr)->formatLocalized(''.trans($this->dateformat).'');
        }
        else
        {
            return '';
        }
    }

    // Show readable created_by value
    public function getCreatedByAttribute($attr)
    {   
        if ($attr)
        {
            return \User::findOrFail($attr)->username;
        }
        else
        {
            return 'SYSTEM';
        } 
    }  

    // Show readable updated_by value
    public function getUpdatedByAttribute($attr)
    {   
        if ($attr)
        {
            return \User::findOrFail($attr)->username;
        }
        else
        {
            return 'SYSTEM';
        } 
    } 

    // Show readable deleted_by value
    public function getDeletedByAttribute($attr)
    {   
        if ($attr)
        {
            return \User::findOrFail($attr)->username;
        }
        else
        {
            return 'SYSTEM';
        } 
    } 

    // Show readable active value
    public static function getActiveAttribute($attr)
    {   
        if ($attr)
        {
            return trans('adminpanel.activestates.'.$attr);
        }
        else
        {
            return trans('adminpanel.activestates.0');
        } 
    } 
    
}

I hope someone can give me a hint to understand what is happening here. Thanks Andreas