Javascript array.filter 按子元素中的元素

Question

我有一个像这样的对象（客户端）数组：

"{"client_id":"AAA1","contracts":[{"contract_id":"CON1-AAA1","revisions":[{"date":"2018-07-30","status":"First Sign"}]}]}"

我可以毫无问题地按 client_id 过滤：

var query = clients.filter(x => x.client_id == "AAA1");

但是，我想按修订日期或状态进行过滤，我进行了以下测试，但出现错误“未捕获的类型错误：无法读取未定义的属性‘状态’”

var query = clients.filter(x => x.contracts.revisions.status == "First Sign");

是否有可能这样做或我是妄想？:)

Answer 1

您可以通过使用一个Array#filter和两个的组合来实现Array#some：

const clients = [{
  "client_id": "AAA1",
  "contracts": [{
    "contract_id": "CON1-AAA1",
    "revisions": [{
      "date": "2018-07-30",
      "status": "First Sign"
    }]
  }]
}, {
  "client_id": "AAA2",
  "contracts": [{
    "contract_id": "CON1-AAA2",
    "revisions": [{
      "date": "2018-08-30",
      "status": "Second Sign"
    }]
  }]
}];

let result = clients.filter(cl => cl.contracts.some(c => c.revisions.some(r => r.status == 'First Sign')));
console.log(result);