'array', 'progress_percent' => 'integer', ]; public function categories() { return $this->hasMany(InterviewCategory::class, 'interview_project_id'); } public function attachments() { return $this->hasMany(InterviewAttachment::class, 'interview_project_id'); } public function knowledge() { return $this->hasMany(InterviewKnowledge::class, 'interview_project_id'); } public function sessions() { return $this->hasMany(InterviewSession::class, 'interview_project_id'); } public function creator() { return $this->belongsTo(User::class, 'created_by'); } }