[英]JS - Filter Nested Array of Objects
樣本JSON數據:
const data = [{
"_id": "5cc5df25a193c21608666b00",
"departmentName": "Software Dev",
"managerId": "5cc5df25a193c21608666b01",
"managerEmail": "swdmanager@company.com",
"teams": [{
"teamName": "SWD Team 1",
"teamLeadId": "5cc5df25a193c21608666b02",
"teamLeadEmail": "swdteam1lead@company.com",
"teamMembers": [{
"memberId": "5cc5df25a193c21608666b03",
"memberEmail": "JonDoe1@company.com"
}]
},
{
"teamName": "SWD Team 2",
"teamLeadId": "5cc5df25a193c21608666b04",
"teamLeadEmail": "swdteam2lead@company.com",
"teamMembers": [{
"memberId": "5cc5df25a193c21608666b05",
"memberEmail": "JonDoe2@company.com"
},
{
"memberId": "5cc5df25a193c21608666b06",
"memberEmail": "JonDoe3@company.com"
}
]
}
]
},
{
"_id": "5cc5df25a193c21608666b07",
"departmentName": "Software QA",
"managerId": "5cc5df25a193c21608666b08",
"managerEmail": "qamanager@company.com",
"teams": [{
"teamName": "QA Team 1",
"teamLeadId": "5cc5df25a193c21608666b09",
"teamLeadEmail": "qateam1lead@company.com",
"teamMembers": [{
"memberId": "5cc5df25a193c21608666b10",
"memberEmail": "JonDoe4@company.com"
}]
},
{
"teamName": "QA Team 2",
"teamLeadId": "5cc5df25a193c21608666b11",
"teamLeadEmail": "qateam2lead@company.com",
"teamMembers": []
},
{
"teamName": "QA Team 3",
"teamLeadId": "5cc5df25a193c21608666b12",
"teamLeadEmail": "qateam3lead@company.com",
"teamMembers": [{
"memberId": "5cc5df25a193c21608666b13",
"memberEmail": "JonDoe4@company.com"
},
{
"memberId": "5cc5df25a193c21608666b14",
"memberEmail": "JonDoe5@company.com"
},
{
"memberId": "5cc5df25a193c21608666b15",
"memberEmail": "JonDoe6@company.com"
}
]
}
]
},
{
"_id": "5cc5df25a193c21608666b16",
"departmentName": "Software Creative",
"managerId": "5cc5df25a193c21608666b17",
"managerEmail": "swcmanager@company.com",
"teams": []
},
{
"_id": "5cc5df25a193c21608666b18",
"departmentName": "Software BA",
"managerId": "5cc5df25a193c21608666b19",
"managerEmail": "swbamanager@company.com",
"teams": [{
"teamName": "BA Team 1",
"teamLeadId": "5cc5df25a193c21608666b20",
"teamLeadEmail": "bateam3lead@company.com",
"teamMembers": []
}]
}
];
描述:有三個級別。 上層=部門,中層=團隊,下層=團隊成員。 一個部門可以有0個或更多的團隊。 一個團隊可以有0個或更多的團隊成員。
目標:我試圖僅返回teamMembers數組已填充至少一個值的數據。
因此,應該在輸出中消除的是:1)軟件質量檢查/質量檢查小組2-僅質量檢查小組2,因為其他質量檢查小組都有teamMembers 2)軟件創意-整個對象,因為它甚至沒有團隊,更不用說了一個teamMember,以及3)軟件BA-擁有一個團隊,但沒有teamMembers。 這三個對象在teamMembers數組中沒有填充單個值。
我覺得我需要使用Array.prototype.filter()但不確定如何使用嵌套對象(#JSnewbie)。 另外,我現在正在學習JS,所以一些建議以最新的方式來實現。
所需輸出:
[
{
"_id": "5cc5df25a193c21608666b00",
"departmentName": "Software Dev",
"managerId": "5cc5df25a193c21608666b01",
"managerEmail": "swdmanager@company.com",
"teams": [
{
"teamName": "SWD Team 1",
"teamLeadId": "5cc5df25a193c21608666b02",
"teamLeadEmail": "swdteam1lead@company.com",
"teamMembers": [
{
"memberId": "5cc5df25a193c21608666b03",
"memberEmail": "JonDoe1@company.com"
}
]
},
{
"teamName": "SWD Team 2",
"teamLeadId": "5cc5df25a193c21608666b04",
"teamLeadEmail": "swdteam2lead@company.com",
"teamMembers": [
{
"memberId": "5cc5df25a193c21608666b05",
"memberEmail": "JonDoe2@company.com"
},
{
"memberId": "5cc5df25a193c21608666b06",
"memberEmail": "JonDoe3@company.com"
}
]
}
]
},
{
"_id": "5cc5df25a193c21608666b07",
"departmentName": "Software QA",
"managerId": "5cc5df25a193c21608666b08",
"managerEmail": "qamanager@company.com",
"teams": [
{
"teamName": "QA Team 1",
"teamLeadId": "5cc5df25a193c21608666b09",
"teamLeadEmail": "qateam1lead@company.com",
"teamMembers": [
{
"memberId": "5cc5df25a193c21608666b10",
"memberEmail": "JonDoe4@company.com"
}
]
},
{
"teamName": "QA Team 3",
"teamLeadId": "5cc5df25a193c21608666b12",
"teamLeadEmail": "qateam3lead@company.com",
"teamMembers": [
{
"memberId": "5cc5df25a193c21608666b13",
"memberEmail": "JonDoe4@company.com"
},
{
"memberId": "5cc5df25a193c21608666b14",
"memberEmail": "JonDoe5@company.com"
},
{
"memberId": "5cc5df25a193c21608666b15",
"memberEmail": "JonDoe6@company.com"
}
]
}
]
}
]
您可以減少數組,並使用遞歸方法檢查並返回嵌套屬性的數組。
Thge函數filter
采用數據數組和嵌套屬性的鍵的數組。 如果想要的鍵的數組包含一些項目,它將返回一個包含項目的數組。
如果還有更多可用的鍵,則將移交並檢查帶有數組的實際屬性。 如果結果不是空數組,則將獲取實際對象的副本以及過濾的結果,然后將該對象推送到結果集中。
如果沒有更多鍵可用,則將不變的對象作為結果集。
function filter(array, [key, ...keys]) { return array.reduce((r, o) => { if (o[key] && o[key].length) { if (keys.length) { var temp = filter(o[key], keys); if (temp.length) r.push(Object.assign({}, o, { [key]: temp })); } else { r.push(o); } } return r; }, []); } var data = [{ _id: "5cc5df25a193c21608666b00", departmentName: "Software Dev", managerId: "5cc5df25a193c21608666b01", managerEmail: "swdmanager@company.com", teams: [{ teamName: "SWD Team 1", teamLeadId: "5cc5df25a193c21608666b02", teamLeadEmail: "swdteam1lead@company.com", teamMembers: [{ memberId: "5cc5df25a193c21608666b03", memberEmail: "JonDoe1@company.com" }] }, { teamName: "SWD Team 2", teamLeadId: "5cc5df25a193c21608666b04", teamLeadEmail: "swdteam2lead@company.com", teamMembers: [{ memberId: "5cc5df25a193c21608666b05", memberEmail: "JonDoe2@company.com" }, { memberId: "5cc5df25a193c21608666b06", memberEmail: "JonDoe3@company.com" }] }] }, { _id: "5cc5df25a193c21608666b07", departmentName: "Software QA", managerId: "5cc5df25a193c21608666b08", managerEmail: "qamanager@company.com", teams: [{ teamName: "QA Team 1", teamLeadId: "5cc5df25a193c21608666b09", teamLeadEmail: "qateam1lead@company.com", teamMembers: [{ memberId: "5cc5df25a193c21608666b10", memberEmail: "JonDoe4@company.com" }] }, { teamName: "QA Team 2", teamLeadId: "5cc5df25a193c21608666b11", teamLeadEmail: "qateam2lead@company.com", teamMembers: [] }, { teamName: "QA Team 3", teamLeadId: "5cc5df25a193c21608666b12", teamLeadEmail: "qateam3lead@company.com", teamMembers: [{ memberId: "5cc5df25a193c21608666b13", memberEmail: "JonDoe4@company.com" }, { memberId: "5cc5df25a193c21608666b14", memberEmail: "JonDoe5@company.com" }, { memberId: "5cc5df25a193c21608666b15", memberEmail: "JonDoe6@company.com" }] }] }, { _id: "5cc5df25a193c21608666b16", departmentName: "Software Creative", managerId: "5cc5df25a193c21608666b17", managerEmail: "swcmanager@company.com", teams: [] }, { _id: "5cc5df25a193c21608666b18", departmentName: "Software BA", managerId: "5cc5df25a193c21608666b19", managerEmail: "swbamanager@company.com", teams: [{ teamName: "BA Team 1", teamLeadId: "5cc5df25a193c21608666b20", teamLeadEmail: "bateam3lead@company.com", teamMembers: [] }] }], result = filter(data, ['teams', 'teamMembers']); console.log(result);
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您可以過濾沒有團隊的團隊,然后將它們映射到一個新數組,以過濾空團隊。
首先,您必須過濾完全沒有任何團隊和任何團隊成員的團隊。 但是您將剩下沒有團隊成員的團隊。 因此,您必須使用.map僅添加具有團隊成員的團隊。
const filterEmptyTeams = (data) => data.filter((department) => { const teams = department.teams.filter((team) => team.teamMembers.length > 0) return teams.length !== 0 }).map((department) => { const teams = department.teams.filter((team) => team.teamMembers.length > 0) return {...department, teams} }) const data = [{ "_id": "5cc5df25a193c21608666b00", "departmentName": "Software Dev", "managerId": "5cc5df25a193c21608666b01", "managerEmail": "swdmanager@company.com", "teams": [{ "teamName": "SWD Team 1", "teamLeadId": "5cc5df25a193c21608666b02", "teamLeadEmail": "swdteam1lead@company.com", "teamMembers": [{ "memberId": "5cc5df25a193c21608666b03", "memberEmail": "JonDoe1@company.com" }] }, { "teamName": "SWD Team 2", "teamLeadId": "5cc5df25a193c21608666b04", "teamLeadEmail": "swdteam2lead@company.com", "teamMembers": [{ "memberId": "5cc5df25a193c21608666b05", "memberEmail": "JonDoe2@company.com" }, { "memberId": "5cc5df25a193c21608666b06", "memberEmail": "JonDoe3@company.com" } ] } ] }, { "_id": "5cc5df25a193c21608666b07", "departmentName": "Software QA", "managerId": "5cc5df25a193c21608666b08", "managerEmail": "qamanager@company.com", "teams": [{ "teamName": "QA Team 1", "teamLeadId": "5cc5df25a193c21608666b09", "teamLeadEmail": "qateam1lead@company.com", "teamMembers": [{ "memberId": "5cc5df25a193c21608666b10", "memberEmail": "JonDoe4@company.com" }] }, { "teamName": "QA Team 2", "teamLeadId": "5cc5df25a193c21608666b11", "teamLeadEmail": "qateam2lead@company.com", "teamMembers": [] }, { "teamName": "QA Team 3", "teamLeadId": "5cc5df25a193c21608666b12", "teamLeadEmail": "qateam3lead@company.com", "teamMembers": [{ "memberId": "5cc5df25a193c21608666b13", "memberEmail": "JonDoe4@company.com" }, { "memberId": "5cc5df25a193c21608666b14", "memberEmail": "JonDoe5@company.com" }, { "memberId": "5cc5df25a193c21608666b15", "memberEmail": "JonDoe6@company.com" } ] } ] }, { "_id": "5cc5df25a193c21608666b16", "departmentName": "Software Creative", "managerId": "5cc5df25a193c21608666b17", "managerEmail": "swcmanager@company.com", "teams": [] }, { "_id": "5cc5df25a193c21608666b18", "departmentName": "Software BA", "managerId": "5cc5df25a193c21608666b19", "managerEmail": "swbamanager@company.com", "teams": [{ "teamName": "BA Team 1", "teamLeadId": "5cc5df25a193c21608666b20", "teamLeadEmail": "bateam3lead@company.com", "teamMembers": [] }] } ]; console.log(filterEmptyTeams(data))
這是帶有兩個嵌套.reduce()
的版本
const result = data.reduce(
(acc, e) => {
if (e.teams && e.teams.length > 0) {
const teams = e.teams.reduce(
(acc, e) => {
if (e.teamMembers && e.teamMembers.length > 0) {
acc.push({...e});
}
return acc;
},
[],
);
if (teams.length > 0) {
acc.push({...e, teams});
}
}
return acc
},
[],
);
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