如何使用Lodash JavaScript过滤以多种条件（字符串和值数组）过滤收集

Question

我正在尝试使用Lodash进行多种条件过滤一个集合，它可以与字符串一起使用，但是我想在位置的一部分中滤除ID数组，并以状态字符串。我试图将ID更改为ID的“位置”：{“ ID”：[“ 1”，“ 4”]}，，但它不起作用

const collection = [ 
  {account: {id: "1", name: "a"}, location:{id: "1", name: "x"}, status: "ok"},
  {account: {id: "2", name: "b"}, location:{id: "2", name: "x"}, status: "ok"},
  {account: {id: "3", name: "c"}, location:{id: "4", name: "y"}, status: "failed"},
  {account: {id: "4", name: "d"}, location:{id: "4", name: "y"}, status: "ok"},]

 let filterByConditions = {
  "location":{"id" :"1"},
  "account":{ "id": "1"},
  "status": "ok",
};

let results = _.filter(collection, filterByConditions);

Answer 1

看来您正在尝试使用 filter 使用“匹配”速记的方法。此速记不支持“或”条件；仅确切匹配。但是，您可以传递_。Filter方法a predicate ，它将起作用：

const collection = [ 
  {account: {id: "1", name: "a"}, location:{id: "1", name: "x"}, status: "ok"},
  {account: {id: "2", name: "b"}, location:{id: "2", name: "x"}, status: "ok"},
  {account: {id: "3", name: "c"}, location:{id: "4", name: "y"}, status: "failed"},
  {account: {id: "4", name: "d"}, location:{id: "4", name: "y"}, status: "ok"},]

let filterByPredicate = (elem) => {
  return elem.status === "ok" && 
    elem.location.id === "1" && 
    (elem.account.id === "1" || elem.account.id === "4");
};

let results = _.filter(collection, filterByPredicate);