错误 [FirebaseError]：文档引用无效。文档引用必须有偶数个段，

Question

const firebase = require("firebase");
// Required for side-effects
require("firebase/firestore");

// Initialize Cloud Firestore through Firebase
firebase.initializeApp({
    apiKey: "____",
    authDomain: "____",
    projectId: "____"
  });
  
var db = firebase.firestore();

var datasetSymptom=[{
    "Disease" : [ "edema pulmonary" ],
    "Symptom" : "Heberden's node"
  }, {
    "Disease" : [ "cholecystitis" ],
    "Symptom" : "Murphy's sign"
  }, {
    "Disease" : [ "hemiparesis", "hypertension pulmonary", "transient ischemic attack" ],
    "Symptom" : "Stahli's line"
  }
  ]

datasetSymptom.forEach(function(obj) {
    db.collection("datasetSymptom").doc(obj.Symptom).set({
        Disease: obj.Disease
    })
});

我已经在另一个集合上运行了相同的算法，其名称与文档相同，Disease 名称与字段相同。它工作得很好。 错误：

D:\react tutorial\reactnative\fyp\node_modules\@firebase\firestore\dist\node-cjs\database-21da52c3-e2da0fdd.js:25868
            throw replaceFunctionName(e, 'doc()', 'CollectionReference.doc()');
            ^

Error [FirebaseError]: Invalid document reference. Document references must have an even number of segments, but datasetSymptom/feels hot/feverish has 3.
    at new FirestoreError (D:\react tutorial\reactnative\fyp\node_modules\←[4m@firebase←[24m\firestore\dist\node-cjs\database-21da52c3-e2da0fdd.js:209:28)
    at validateDocumentPath (D:\react tutorial\reactnative\fyp\node_modules\←[4m@firebase←[24m\firestore\dist\node-cjs\database-21da52c3-e2da0fdd.js:19706:15)
    at doc (D:\react tutorial\reactnative\fyp\node_modules\←[4m@firebase←[24m\firestore\dist\node-cjs\database-21da52c3-e2da0fdd.js:22462:9)
    at CollectionReference$1.doc (D:\react tutorial\reactnative\fyp\node_modules\←[4m@firebase←[24m\firestore\dist\node-cjs\database-21da52c3-e2da0fdd.js:25864:64)
    at D:\react tutorial\reactnative\fyp\index2x2.js:1233:37
    at Array.forEach (<anonymous>)
    at Object.<anonymous> (D:\react tutorial\reactnative\fyp\index2x2.js:1231:16)
←[90m    at Module._compile (internal/modules/cjs/loader.js:1063:30)←[39m
←[90m    at Object.Module._extensions..js (internal/modules/cjs/loader.js:1092:10)←[39m
←[90m    at Module.load (internal/modules/cjs/loader.js:928:32)←[39m {
  code: ←[32m'invalid-argument'←[39m,
  toString: ←[36m[Function (anonymous)]←[39m
}

/////////////////////////////////////// ///////////////////////////////////////// ////////////////////////////////////////p >

Answer 1

您的数组中的一个或多个对象似乎没有Symptom 属性。当这种情况发生时，doc(obj.Symptom) 会导致对空文档的引用，这就是导致错误的原因。

要查找有问题的数组项，请手动检查您的 JSON，或在您的代码中执行以下操作：

datasetSymptom.forEach(function(obj, index) {
  if (obj.Symptom && object.Symptom.length) {
    db.collection("datasetSymptom").doc(obj.Symptom).set({
      Disease: obj.Disease
    })
  }
  else {
    console.error(`Found an object without a Symptom at index ${index} in the array`);
  }
});