['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'], ]; } }