I'm getting a TypeScript syntax error in the filter operator saying Property "searchCriteria" does not exist on type "never".
I must be failing in my understanding of concatLatestFrom because I can't get this operator to work (compile) in the effect and I can't find any other places where people are having a similar issue.
loadSearchResults$ = createEffect(() => this.actions$.pipe(
ofType(searchActions.SearchApi.type),
concatLatestFrom((action) =>
this.searchStore.pipe(select(fromSearchSelectors.getSelectedRecordRangeResults))),
filter(([action, recordResultList]) => !recordResultList[createRowID(action.searchCriteria.recordRange)]),
Found the problem, ofType(searchActions.SearchApi.type) needed only ofType(searchActions.SearchApi). So I didn't need to give the "type" off the creator class.
I've been struggling with this for a while but can't find a clean way to do it, so I'm seeking for some help.
I have custom filters (ApiPlatform 2.5 and Symfony 5.1) on database API outputs, and I need to filter on the current workflow place, or status as you like, of each output.
The Status has the below structure, which is a symfony workflow's place :
Status = { "OPEN": 1 }
My issue is that the status is stored as an array in the DB, and I can't find a way to have the querybuilder finding a match.
I've tried to build locally an array to do an = , a LIKE or an IN :
$status['OPEN'] = 1;
$queryBuilder->andWhere(sprintf('%s.Status = :st', $rootAlias))
->leftJoin(sprintf('%s.Objs', $rootAlias), 'o')
->andWhere('o.Profile = :p')
->setParameters(array(
'st' => $status,
'p' => $profile
));
But no way :(
I implemented a workaround that works but I don't like it as I'm using workflows a lot and need a clean way to filter outputs.
My workaround is fairly simple, when the status is writen as an array in the DB, I also store it as a string in another field called StatusText, then filtering on StatusText is easy and straight.
Status can have different contents obviously : OPEN, CLOSING, CLOSED, ...
Help appreciated !!
Thanks
EDIT & Solution
As proposed by Youssef, use scienta/doctrine-json-functions and use JSON_EXTRACT :
composer require scienta/doctrine-json-functions
Important, that was part of my issue, use the Doctrine type json_array an not array to store the status or the state, however you call it, in the Database.
Integrate the alias provided inside the ApiPlatform custom filter :
$rootAlias = $queryBuilder->getRootAliases()[0];
$json_extract_string = "JSON_EXTRACT(".$rootAlias.".Status, '$.OPEN') = 1";
$queryBuilder->andwhere($json_extract_string )
->leftJoin(sprintf('%s.Objs', $rootAlias), 'o')
->andWhere('o.Profile = :p')
->setParameter('p', $profile);
You need to ask Doctrine if the JSON array contains the status, but you can't do that with the QueryBuilder method.
When you hit the ORM limitations you can use a Native Query with ResultSetMapping. It allows you to write a pure SQL query using specific features of your DBMS but still get entity objects.
Or you can use scienta/doctrine-json-functions and use JSON_EXTRACT
I have a collection named 'test', which has multiple documents.
Each document has a unique name and a number field.
I have implemented pagination using query cursor. The query to get initial documents is as follows:
let lastDocument={};
ref.collection("test").orderBy('number', 'desc').limit(3).get()
.then(snapshot => {
lastDocument = snapshot.docs[snapshot.docs.length-1];
})
.catch(err => {
console.log("Error getting documents", err);
});
After getting the lastDocument, I paginate it as follows:
ref.collection("test").orderBy('number', 'desc').startAfter(lastDocument).limit(3); //lastDocument has the last document of the snapshot that was retrieved.
In my collection, if there are 2 or more documents which have same value of field 'number', then I don't get that document in the query result. Whereas, If I change the value of the field 'number', so as to make all the documents unique, I get all the results in batches(according to the limit clause) properly.
It's mentioned in the document as well, that, if multiple fields have same population value, the query won't work https://firebase.google.com/docs/firestore/query-data/query-cursors#paginate_a_query
How should I modify the query, so as to get all documents in the result, even if 2 or more documents have same values for the field used in orderBy?
I am using:
"react-native-firebase": "^5.5.6",
"react-native": "^0.59.8",
"firebase": "^6.6.1",
Update: I have tested the queries on JSbin and it returns proper
results. I have issues when I use it in react native app with
react-native-firebase library. The pattern that I have recognised so
far is as follows: let's say, there are documents like below
{id:a,num:1},{id:b,num:2},{id:c,num:2},{id:d,num:2},{id:e,num:3},{id:f,num:4}
Then if I query for the first set with orderBy('num','desc') and limit
as 2, I'll get [a,b]. Now, if I query with the startAfter last
document as 'b' and limit as 2, then it will skip all the documents
after b, which have num same as that of b (i.e 2). So, it'll skip doc
[c,d] and return me [e,f]. This works fine on jsbin, but not on react
native using react-native-firebase library.
Please find the exact output for the code here on react-native below:
"Got all results"
"wbXwyLJheRfYXXWlY46j => {\"index\":2,\"number\":2}"
"kGC5cYPN1nKnZCcAb9oQ => {\"index\":6,\"number\":2}"
"8Ek8iWCDQPPJ5s2n8PiQ => {\"index\":4,\"number\":2}"
"mr7MdAygvuheF6AUtWma => {\"index\":1,\"number\":1}"
"RCO5SvNn4fdoE49OKrIV => {\"index\":3,\"number\":1}"
"CvVG7VP1hXTtcfdUaeNl => {\"index\":5,\"number\":1}"
"Got first page"
"wbXwyLJheRfYXXWlY46j => {\"index\":2,\"number\":2}"
"kGC5cYPN1nKnZCcAb9oQ => {\"index\":6,\"number\":2}"
"Got second page"
"mr7MdAygvuheF6AUtWma => {\"index\":1,\"number\":1}"
"RCO5SvNn4fdoE49OKrIV => {\"index\":3,\"number\":1}"
Note that it has skipped : "8Ek8iWCDQPPJ5s2n8PiQ => {\"index\":4,\"number\":2}"
Encountered one more issue in react-native-firebase library:
If there is a map structure in the documents like below:
{
subscribedUsers:{
+1656666:true,
+1657878:false,
+1677676:true
}
}
Now if I fire a query like below:
db.collection("ownerUsers").where(subscribedUsers.${phonenumber} ,
'==' , true).limit(3).get();
The query returns 3 results.Now, if I try to get the next 3 results using startAfter clause like below, it works fine with firebase, but doesn't work with react-native-firebase library:
db.collection("ownerUsers").where(subscribedUsers.${phonenumber} , '==' , true).startAfter(last).limit(3).get()
then I get the below error:
[Info] 11-10 21:38:42.631 21908 21967 I ReactNativeJS: 'Error getting documents', { [Error: Firestore: Client specified an invalid argument. (firestore/invalid-argument).]
This is a bug in the react-native-firebase library. Check out the issue on Github to follow along. The issue is now marked as fixed, and this fix will be included in the next release (>5.5.6).
Old answer below...
The document you pass into startAfter needs to contain all the Firestore needs to determine where to start next. If the fields you filter on are not unique in the collection, the DocumentSnapshot will also need to contain the ID of the document. If your query is showing the first or second document matching the criteria, instead of the one after the one you're looking for, it's most likely because the ID is missing from lastDocument.
After your update, I tried reproducing the problem with this code:
var db = firebase.firestore();
var ref = db.collection("58783480").orderBy('number', 'desc');
ref.get().then(function(snapshot) {
console.log("Got all results");
snapshot.forEach(function(doc) {
console.log(doc.id+' => '+JSON.stringify(doc.data()));
});
var last;
ref.limit(2).get().then(function(snapshot) {
console.log("Got first page");
snapshot.forEach(function(doc) {
console.log(doc.id+' => '+JSON.stringify(doc.data()));
last = doc;
});
ref.startAfter(last).limit(2).get().then(function(snapshot) {
console.log("Got second page");
snapshot.forEach(function(doc) {
console.log(doc.id+' => '+JSON.stringify(doc.data()));
last = doc;
});
});
})
});
live example here
But the output matches exactly with what I'd expect:
Got all results
wbXwyLJheRfYXXWlY46j => {"index":2,"number":2}
kGC5cYPN1nKnZCcAb9oQ => {"index":6,"number":2}
8Ek8iWCDQPPJ5s2n8PiQ => {"index":4,"number":2}
mr7MdAygvuheF6AUtWma => {"index":1,"number":1}
RCO5SvNn4fdoE49OKrIV => {"index":3,"number":1}
CvVG7VP1hXTtcfdUaeNl => {"index":5,"number":1}
Got first page
wbXwyLJheRfYXXWlY46j => {"index":2,"number":2}
kGC5cYPN1nKnZCcAb9oQ => {"index":6,"number":2}
Got second page
8Ek8iWCDQPPJ5s2n8PiQ => {"index":4,"number":2}
mr7MdAygvuheF6AUtWma => {"index":1,"number":1}
I have one-to-many relationship between two entities: User (one) has Messages (many) collection.
There needs to display some information about User and at the same time needs to load single Message.
I try to do something like:
mycontext.Users.Where(..).Include(user => user.Messages.Take(1).First());
However this code throws ecxeption
InvalidOperationException: The property expression 'user=> {from
Message m in [chat].Messages select
[m] => Take(1) => First()}' is not valid. The expression should
represent a property access: 't => t.MyProperty'. For more information
on including related data, see
http://go.microsoft.com/fwlink/?LinkID=746393.
How can I solve it?
Pretty easy. Instead of trying to load a message from a user, load the user from the message:
mycontext.Messages.Where(..).Include(msg => msg.User);
In fact, you can do it easier for you:
mycontext.Messages
.Include(msg => msg.User)
.Where(msg => msg.User...);
So you don't have to filter on Message rather than on User
You cannot do that the way you have tried.You have to retrieve all the related messages from the db and after that filter it on the memory (IEnumerable) as shown below.
var useList= mycontext.Users.Where(..).Include(user => user.Messages);
foreach (var u in useList)
{
var message= u.Messages.Take(1).First();
}
Using the motion-firebase library for RubyMotion Firebase (https://github.com/colinta/motion-firebase) I can set data easy enough either by doing:
firebase.set({ full_name: ['first_name' => 'Fred', 'last_name' => 'Flintstone'] })
or
firebase['first_name'] = 'Fred'
But I'm having trouble figuring out how to retrieve data.
I've tried the different firebase.query methods listed in the reponse readme but I'm definitely missing something.
I'd hoped it would be as simple as:
firebase.query['first_name']
=> 'Fred'
Could someone please explain how I might go about querying Firebase with a key and returning the value.
colinta here! You'll need to attach an observer (https://github.com/colinta/motion-firebase#attaching-observers-to-read-data).
firebase_ref.once(:value) { |snapshot| snapshot.value }
See https://www.firebase.com/docs/ios-api/Classes/FDataSnapshot.html for info on the FDataSnapshot type.