laravel relationship with where condition code example

Example 1: laravel where condition on relationship

App\Request::where('id',4)
    ->whereHas('quotes', function ($query) {
        $query->where('status','=','3');
    })
    ->with('quotes','sourceTable','destinationTable')
    ->get();

Example 2: how to use where relationship laravel

Event::with(["owner", "participants" => function($q) use($someId){
    $q->where('participants.IdUser', '=', 1);
    //$q->where('some other field', $someId);
}])

Example 3: laravel adding condition to relation

class Game extends Eloquent {
    // many more stuff here

    // relation without any constraints ...works fine 
    public function videos() {
        return $this->hasMany('Video');
    }

    // results in a "problem", se examples below
    public function available_videos() {
        return $this->videos()->where('available','=', 1)->get();
    }
}

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