['bail', 'required', 'exists:atributs,id'], 'name' => 'required' ]; public function atribut() { return $this->belongsTo(Atribut::class, 'atribut_id'); } public function probability() { return $this->hasOne(Probability::class, 'nilai_atribut_id'); } public function training_data() { return $this->hasMany(TrainingData::class); } public function testing_data() { return $this->hasMany(TestingData::class); } }