*/ protected $fillable = [ 'user_id', 'type', 'amount', 'balance_after', ]; /** * 字段类型转换 */ protected function casts(): array { return [ 'amount' => 'integer', 'balance_after' => 'integer', ]; } /** * 所属用户 */ public function user(): BelongsTo { return $this->belongsTo(User::class); } }