How do I get the generated documentID of a document in Firestore in Flutter?
I know I can access the various fields of a document like this:
return Firestore().collection(postPath).data.documents.forEach((response) {
nodeList.add(Post(
// response.data().id - how do i get the UID (example: -LUoDIu4wlVksjbbfIWE)?
response['content'],
response['date'],
response['flair'],
response['location'],
response['username'],
));
});
But I am unsure of the method to call get the UID of the document.
You are looking for documentId property.
String id = response.documentID;
If documentId property does not exist for your response object, update the cloud_firestore plugin to a newer version.
Related
$id The key where this record is stored. The same as obj.$ref().key
To get the id of an item in a $firebaseArray within ng-repeat, call $id on that item.
These two are from the angular fire reference:
https://github.com/firebase/angularfire/blob/master/docs/reference.md
What I understand is if there is firebase object created with :
var object = $firebaseObject(objectRef);
then I can use uid always.
uid : object.uid
But I saw examples where the firebase auth user is used with $id.
return Auth.$requireSignIn().then(function (firebaseUser) {
return Users.getProfile(firebaseUser.uid).$loaded().then(function (profile) {
**profile.uid or profile.$id here**
Also is it possible the object to have uid but not to have $id (obj.$ref().key). Aren't they the same thing? Does the object have to be loaded first with $loaded() to use $id or uid?
Regards
You seem to be confusing two concepts:
the object.$id of an AngularFire object contains the key of that object in the Firebase Database.
a firebaseUser.uid in Firebase terms is the identification of a Firebase Authentication user.
It is common to store your Firebase Authentication users in the database under their uid, in which case user.$id would be their uid. But they are still inherently different things.
Users
uid1
displayName: "makkasi"
uid2
displayName: "Frank van Puffelen"
So if you we look at the code snippet you shared:
return Auth.$requireSignIn().then(function (firebaseUser) {
return Users.getProfile(firebaseUser.uid).$loaded().then(function (profile) {
The first line requires that the user is signed-in; only then will it execute the next line with the firebaseUser that was signed in. This is a regular JavaScript object (firebase.User), not an AngularFire $firebaseObject.
The second line then uses the firebaseUser.uid property (the identification of that user) to load the user's profile from the database into an AngularFire $firebaseObject. Once that profile is loaded, it executes the third line.
If the users are stored in the database under their uid, at this stage profile.$id and firebaseUser.uid will be the same value.
i am trying to connect sapui5/openui5 ODataModel to an odata-server. I want to use a nodejs server with package simple-odata-server. Unfortunately this odata server provides metadata only in xml-format. But sapui5 tries to load metadata in json-format.
Before i switch to another odata server, i want to check, wether sapui5 can load metadata in xml-format. I tried to create the model with several parameters, but ODataModel still tries to load metadata as json.
var oModel = new ODataModel("/odata", {
"metadataUrlParams": "$format=xml",
"json": false
});
Does anybody know, wether i can switch to $format=xml
Thanks in advance,
Torsten
As far as I know the OData protocol metadata is always provided as XML, never seen metadata in JSON format. Also my n-odata-server Qualiture mentioned in the comment above does it. But I never had problems with SAPUI5. It requests the metadata, gets the xml stream and works with it.
Since the metadataUrlParams parameter is of type map I'd suppose it would at least do what you intend like this:
var oModel = new ODataModel("/odata", {
"metadataUrlParams": {
"$format": "xml"
}
});
https://sapui5.hana.ondemand.com/sdk/#docs/api/symbols/sap.ui.model.odata.ODataModel.html#constructor
I tried to update one entity in my angularjs client using breezejs library. After calling saveChanges(), it can actually save back in the server and fetched on the client. However, the server did not return the response back. The saveResult.entities is undefined and pop up an error for me. When I took a look at the docs, it mentions 'Some service APIs do not return information about every saved entity. If your server doesn't return such information, you should add the pre-save, cached entity to saveResult.entities yourself'. Could anyone provide an example of how to do this?
This is the code when i am trying to do an update.
manager.saveChanges(entitiesToSave, null, (saveResult) => {
const savedRes = saveResult;
savedRes.entities = entitiesToSave;
return savedRes;
}).then(saveSucceeded);
On the server, you would need to construct the response for an update similar to the way it is for a create:
response.setContent(...); // entities
response.setStatusCode(HttpStatusCode.OK.getStatusCode());
response.setHeader(HttpHeader.CONTENT_TYPE, responseFormat.toContentTypeString());
I'm using the Express framework and Mongodb for my application.
When I insert objects into the database, I use a custom ObjectID. It's generated using mongo's objectid function, but toString()ed (for reasons i think are irrelevant, so i won't go into them). Inserts look like this:
collection.insert({ _id: oid, ... })
The data is in mongo - i can db.collection.find().pretty() from mongo's cli and see it exactly as it's supposed to be. But when I run db.collection.find({_id: oid}) from my application, I get nothing ([] to be exact). Even when I manually hardcode the objectID that I'm looking for (that I know is in the database) into my query, I still can't get an actual result.
As an experiment, I tried collection.find({title: "test title"}) from the app, and got exactly the result I wanted. The database connection is fine, the data structure is fine, the data itself is fine - the problem is clearly with the _id field.
Query code:
var sid = req.param("sid");
var db = req.db;
var collection = db.get("stories");
collection.find({'_id': sid }, function(err, document) {
console.log(document.title);
});
Any ideas on how I can get my document by searching _id?
update: per JohnnyHK's answer, I am now using findOne() as in the example below. However, it now returns null (instead of the [] that i was getting). I'll update if I find a solution on my own.
collection.findOne({'_id': sid }, function(err, document) {
console.log(document);
});
find provides a cursor as the second parameter to its callback (document in your example). To find a single doc, use findOne instead:
collection.findOne({'_id': sid }, function(err, document) {
console.log(document.title);
});
What I am trying to do is make a copy of a template doc, the append sheet data to the new file.
I am using the doc URL as the id. However, when I try to access the file I am getting this error
"Document is missing (perhaps it was deleted?) (line 21)"
Line 21 is
var templateid = "URL";
var file = DocumentApp.openById(templateid);
Can anyone advise on what the problem could be?
The document id is not the URL of the document, but it is a UID generated when the document is created, e.g., it is the value of id after var id = createDocWithTable("doc with table").
You need to keep track of this id separately. If you have the document object, you can retrieve it with its getId() method. The ID is also encoded into the URL, so https://docs.google.com/document/d/3ckYOu8kuIfBzbu-Dtu9XwGHUnUJG32PK7wHe5xMv3VG/ has document id 3ckYOu8kuIfBzbu-Dtu9XwGHUnUJG32PK7wHe5xMv3VG