Cannot convert object to primitive value

Question

如下是我的提交数据(json):

{"form_1":[{"resultName":"","level":"","unitOrder":"","winner":"","winnerOrder":"","date":"1","score":""}],
"form_2":[{"resultName":"","level":"","unitOrder":"","winner":"","winnerOrder":"","date":"1","score":""}],
"form_3":[{"resultName":"","level":"","unitOrder":"","winner":"","winnerOrder":"","date":"1","score":""}]
}

然后express下获取req.body打印:

console.log(req.body)

报错：

TypeError: Cannot convert object to primitive value

请问这种情况怎么回事呢？我要如何正确获取传过来的数据

Answer 1

数据类型转换不成功 提交数据应该是集合类型，外面的"form_1"，不能找到对应的字段，后面还有"form_2"。。这个的，建议去掉，直接{1:{},2:{},3:{}}，这样提交