N N
Reputation: 1638
How to get documents without metadata from firestore
In firestore there are collections cities, posts and users. posts have documents with reference to one user and a city, I wanted to retrieve all data from all posts and wrote a query:
firestore.collection('posts')
.get()
.then(snapshot => {
snapshot.docs.forEach(post => {
console.log(post.data())
});
});
although I have only one document in posts, in my console I get thousands of lines of data, all I need is something like this:
postId: {
city: "city_name",
user: {
name: "Name",
lastName: "Last"
},
description: "bla bla"
}
how can I get only needed data without all extra metadata? Here is the about 30% of output:
<code>
},
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"queries": ObjectMap {
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},
"references": ReferenceSet {
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"root": LLRBEmptyNode {
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},
},
},
"refsByTarget": SortedSet {
"comparator": [Function anonymous],
"data": SortedMap {
"comparator": [Function anonymous],
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"size": 0,
},
},
},
},
"targetCount": 0,
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},
},
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},
},
},
"refsByTarget": SortedSet {
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"root": LLRBEmptyNode {
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},
},
},
},
"orphanedDocuments": Set {},
"persistence": [Circular],
},
"remoteDocumentCache": MemoryRemoteDocumentCache {
"docs": SortedMap {
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"root": LLRBEmptyNode {
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},
},
"indexManager": MemoryIndexManager {
"collectionParentIndex": MemoryCollectionParentIndex {
"index": Object {
"species": SortedSet {
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"root": LLRBNode {
"color": false,
"key": ResourcePath {
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"offset": 5,
"segments": Array [
"projects",
"dallol",
"databases",
"(default)",
"documents",
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"sigir",
],
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"data": SortedMap {
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"root": LLRBEmptyNode {
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},
},
},
"indexManager": MemoryIndexManager {
"collectionParentIndex": MemoryCollectionParentIndex {
"index": Object {
"species": SortedSet {
"comparator": [Function anonymous],
"data": SortedMap {
"comparator": [Function anonymous],
"root": LLRBNode {
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"key": ResourcePath {
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"lastStreamToken": "",
"mutationQueue": Array [],
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"referenceDelegate": MemoryEagerDelegate {
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"refsByTarget": SortedSet {
"comparator": [Function anonymous],
"data": SortedMap {
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"root": LLRBEmptyNode {
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},
},
},
"orphanedDocuments": Set {},
"persistence": [Circular],
},
},
},
"queryCache": [Circular],
"referenceDelegate": MemoryEagerDelegate {
"inMemoryPins": ReferenceSet {
"refsByKey": SortedSet {
"comparator": [Function anonymous],
"data": SortedMap {
"comparator": [Function anonymous],
"root": LLRBEmptyNode {
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},
},
"refsByTarget": SortedSet {
"comparator": [Function anonymous],
"data": SortedMap {
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"root": LLRBEmptyNode {
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},
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"orphanedDocuments": Set {},
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},
"remoteDocumentCache": MemoryRemoteDocumentCache {
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"indexManager": MemoryIndexManager {
"collectionParentIndex": MemoryCollectionParentIndex {
"index": Object {
"species": SortedSet {
"comparator": [Function anonymous],
"data": SortedMap {
"comparator": [Function anonymous],
"root": LLRBNode {
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"key": ResourcePath {
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"offset": 5,
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"species",
"sigir",
],
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},
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},
"newDocumentChanges": SortedSet {
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"root": LLRBNode {
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"key": DocumentKey {
"path": ResourcePath {
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"(default)",
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"left": LLRBEmptyNode {
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},
"size": 1,
"value": true,
},
},
},
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},
},
"queries": ObjectMap {
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"mapKeyFn": [Function anonymous],
},
"references": ReferenceSet {
"refsByKey": SortedSet {
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"comparator": [Function anonymous],
"root": LLRBEmptyNode {
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},
},
"refsByTarget": SortedSet {
"comparator": [Function anonymous],
"data": SortedMap {
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"collectionParentIndex": MemoryCollectionParentIndex {
"index": Object {
"species": SortedSet {
"comparator": [Function anonymous],
"data": SortedMap {
"comparator": [Function anonymous],
"root": LLRBNode {
"color": false,
"key": ResourcePath {
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"offset": 5,
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"projects",
"dallol",
"databases",
"(default)",
"documents",
"species",
"sigir",
],
},
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},
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},
"size": 1,
"value": true,
},
},
},
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},
},
"newDocumentChanges": SortedSet {
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"root": LLRBNode {
"color": false,
"key": DocumentKey {
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"offset": 5,
"segments": Array [
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"(default)",
"documents",
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],
},
},
"left": LLRBEmptyNode {
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},
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"size": 0,
},
"size": 1,
"value": true,
},
},
},
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"sizer": [Function sizer],
},
},
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"onlineStateTracker": OnlineStateTracker {
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"tail": Promise {
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"_55": Promise {
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"_55": null,
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},
"_65": 3,
"_72": null,
},
},
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},
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"documentChanges": SortedMap {
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},
},
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},
},
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"tail": Promise {
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},
},
"timerId": "listen_stream_connection_backoff",
"timerPromise": null,
},
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"connection": WebChannelConnection {
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"databaseId": DatabaseId {
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"projectId": "dallol",
},
"forceLongPolling": false,
},
"credentialsProvider": FirebaseCredentialsProvider {
"app": FirebaseAppImpl {
"INTERNAL": Object {
"addAuthTokenListener": [Function bound ],
"getToken": [Function bound ],
"getUid": [Function bound ],
"removeAuthTokenListener": [Function bound ],
},
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"firebase_": Object {
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"firestore": [Function anonymous],
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},
},
},
}
</code>Upvotes: 0
Views: 102
Answers (1)
Doug Stevenson
Reputation: 317750
With a document get(), you can't filter (reduce) the fields in it. When using mobile and web client SDKs, all get() operations return for all fields for all documents matched. If you need less data, you'll have to split the data into different documents and query them individually.
Upvotes: 1
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