从 mongo 返回的对象（findOne）中过滤/返回单个嵌套对象

Question

尽管围绕这个主题有一些问题，但我还没有找到一个明确的通用“最佳实践”来过滤返回的流星 mongo 集合对象。

（仅供参考：我正在使用 MeteorJS）

我从 configs 集合中提取了一个配置文档。

let thisConfig = ClinicConfigs.findOne({_id: "xyz"});

这已返回以下内容

{
    _id: "xyz",
    name: "john doe's clinic",
    activeServices: [
         {
             name: "teeth whitening",
             ref: "teethWhitening",
             docs: [
                 {
                     docId: "a",
                     name: "Client questionnaire",
                     ref: "clientQuestionnaire",
                 },
                 {
                     docId: "b",
                     name: "Client consent form",
                     ref: "clientConsentForm",
                 }
             ]
         },
         {
             name: "liposuction",
             ref: "liposuction",
             docs: [
                 {
                     docId: "a",
                     name: "Client questionnaire",
                     ref: "clientQuestionnaire",
                 },
                 {
                     docId: "b",
                     name: "Client consent form",
                     ref: "clientConsentForm",
                 }
             ]
         }
    ];

一旦我返回了这个文档/对象，我只需要从 activeServices 数组中提取一个对象。

虽然这行不通，但下面是阐明我需要什么的逻辑：

let thisService = ClinicConfigs.findOne({_id: "xyz"})
        .activeServices.findOne({ref: "teethWhitening"});

我尝试了以下方法，但没有成功：

let thisConfig = ClinicConfigs.findOne({_id: "xyz"});
let thisService = thisConfig.activeServices.filter(function(d) {return d.ref === "teethWhitening"})[0];

return thisService.docs;

Answer 1

它有效，但我必须用尾括号更正您的 thisConfig 数据对象。所以一旦它就像

var thisCongig = {
    _id: "xyz",
    name: "john doe's clinic",
    activeServices: [
         {
             name: "teeth whitening",
             ref: "teethWhitening",
             docs: [
                 {
                     docId: "a",
                     name: "Client questionnaire",
                     ref: "clientQuestionnaire",
                 },
                 {
                     docId: "b",
                     name: "Client consent form",
                     ref: "clientConsentForm",
                 }
             ]
         },
         {
             name: "liposuction",
             ref: "liposuction",
             docs: [
                 {
                     docId: "a",
                     name: "Client questionnaire",
                     ref: "clientQuestionnaire",
                 },
                 {
                     docId: "b",
                     name: "Client consent form",
                     ref: "clientConsentForm",
                 }
             ]
         }
    ]
};
var thisService = data.activeServices.find( d => d.ref == "teethWhitening");

它被检索了。