['nullable', 'integer'], 'parent_id' => ['nullable', 'integer'], 'student_id' => ['nullable', 'integer'], 'school_year' => ['nullable', 'string', 'max:20'], 'semester' => ['nullable', 'string', 'max:40'], 'event_name' => ['nullable', 'string', 'max:255'], 'title' => ['nullable', 'string', 'max:255'], 'description' => ['nullable', 'string'], 'amount' => ['nullable', 'numeric', 'min:0'], 'invoice_id' => ['nullable', 'integer'], ]; } }