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How can I give an object a temporary mark in Sequelize model

I use Sequelize to load items from database. The item contain a number type attribute called tValue, if tValue is null, then I need to assign a value to it, if not null, then do nothing and then pass all items to a function and it will return a new array.
What I want is to revert those updated items, make them back to null tValue before I save this list of array to database.
The issues is I don't know which item originally contain null tValue, because all of them have value now.
Can I give an object a temporary mark, so I can revert those items with mark.
The code snippet I do to assign value is like this
const mustHaveTValueArray = await Promise.all(
samples.map(async (s) => {
if (!s.tValue) {
console.warn(`sample ${s.id} do not have a t value`);
await s.update({ tValue: randomValue });
return s;
} else {
return s;
}
})
);
mustHaveTValueArray will be passed to a function, and return a new array
const newArray = reorderFunction(mustHaveTValueArray)
Each element in newArray now have valid tValue, how can I detect those originally have null tValue

the idea just come up in my head, guys
let temporaryIds = [];
const mustHaveTValueArray = await Promise.all(
samples.map(async (s) => {
if (!s.tValue) {
console.warn(`sample ${s.id} do not have a t value`);
await s.update({ tValue: randomValue });
temporaryIds.push(s.id);
return s;
} else {
return s;
}
})
);
Then I can use this temporaryIds to find which one originally have null tValue, like this
const finalArray = await Promise.all(
newArray.map(async (n) => {
if (temporaryIds.includes(n.id)) {
console.log('revert');
await n.update({ tValue: null });
return n;
} else {
return n;
}
})
);
what do you think, is it this make sense to you, guys
22/10/22 update:
model.update actually is calling set and then calling save, so what I need to do, I should use set instead of update, otherwise it will write db which is not my purpose. setis perfectly fit my situation, instruction from official document:
Set is used to update values on the instance (the sequelize
representation of the instance that is, remember that nothing will be
persisted before you actually call save). In its most basic form set
will update a value stored in the underlying dataValues object.
so updated code would be
const mustHaveTValueArray =
samples.map((s) => {
if (!s.tValue) {
console.warn(`sample ${s.id} do not have a t value`);
s.set({ tValue: randomValue });
return s;
} else {
return s;
}
});
And I can do whatever I want with mustHaveTValueArray
question solved

How do I search through raw data for matching data?

Right now, I coded a function to go like this
async function checkPlayerScam(ign) {
const UUID = await getUUID(ign);
if(MATCHING){
playerIsScammer = true
}
else {
playerIsScammer = false
}
}
The MATCHING is just a placeholder at the moment. I want to check their UUID, and make sure it isn't in this list: https://raw.githubusercontent.com/skyblockz/pricecheckbot/master/scammer.json
Any idea how? It needs to be relatively fast
EDIT: It'd also be cool if I could get the reason from the list, but that's not as necessary

https://lodash.com/docs/#find
Use lodash _.find to
const uuid = '000c97aaf948417a9a74d6858c01aaae'; // uuid you want to find
const scammer = _.find(scammersList, o => o.uuid === uuid);
if (scammer) { // if scammer found
console.log(scammer);
console.log(scammer.reason)
}

For anyone wondering, this is how I solved it:
async function checkPlayerScam(ign) {
const UUID = await getUUID(ign);
const response = await fetch(`https://raw.githubusercontent.com/skyblockz/pricecheckbot/master/scammer.json`);
const result = await responsejson();
if (result[UUID] = null) {
playerIsScammer == False
}
else{
playerIsScammer == True
}
}

This function will fetch the data, then check if the uuid 1d0c0ef4295047b39f0fa899c485bd00 exists. Assuming that you already fetched the data somewhere else and stored it, all you need to do is check if a given uuid exists by adding the following line where you please:
!!data[uuidToCheck]
uuidToCheck should be the uuid string that you are looking for.
This line will return true if the uuid exists and false otherwise.
In terms of the spacetime complexity, this function runs in constant time [O(1)] and O(N) space. This is the fastest time you can get it to run.
data[uuidToCheck].reason will return the reason.
async function playerIsScammer(uuidToCheck) {
uuidToCheck = '1d0c0ef4295047b39f0fa899c485bd00';
const response = await fetch('https://raw.githubusercontent.com/skyblockz/pricecheckbot/master/scammer.json');
if (response.ok){
let data = await response.json();
if(!!data[uuidToCheck])
return data[uuidToCheck].reason;
return false
}
}

if else in loop bringing up errors in typescript

I have this function that is supposed to get referral codes from users. User gives a code and the referral code checked if it exists in the database then evaluated if
it does not match the current user, so that one should not refer himself and
it is a match with one of the codes in the database
This code however just does not find a match even if the code given is in the database. If the referral code matches the one of the current user, it works correctly and points that out i.e one cannot refer themselves.
But if the referral code is a match to that of another user which is how a referral system should work, it still says no match.
How can I remove this error
export const getID = functions.https.onCall(async(data, context) => {
const db = admin.firestore();
const usersSnapshot = await db.collection("user").get();
const allUIDs = usersSnapshot.docs.map(doc => doc.data().userID);
const userID = context.auth.uid;
const providedID = "cNx7IuY6rZlR9mYSfb1hY7ROFY2";
//db.collection("user").doc(providedID).collection("referrals").doc(userID);
await check();
function check() {
let result;
allUIDs.forEach(idFromDb => {
if (providedID === idFromDb && (idFromDb === userID)) {
result = "ownmatch";
} else if (providedID === idFromDb && (idFromDb !== userID)) {
result = "match";
} else {
result = "nomatch";
}
});
return result;
}
if (check() === "match") {
return {
message: `Match Found`,
};
} else if (check() === "ownmatch") {
return {
message: `Sorry, you can't use your own invite code`,
};
} else {
return {
message: `No User with that ID`
};
}
});

(This is not an answer, but a simple refactoring.)
This is what your code is currently doing (roughly, I didn't run it):
const resultMsgs = {
nomatch: 'No User With That ID',
ownmatch: 'Sorry, you can\'t use your own invite code',
match: 'Match Found',
}
function check(uids, providedId, userId) {
let result
uids.forEach(idFromDb => {
if (providedId !== idFromDb) {
result = 'nomatch'
return
}
if (userID === idFromDb) {
result = 'ownmatch'
return
}
result = 'match'
})
return result
}
export const getID = functions
.https
.onCall(async (data, context) => {
const userId = context.auth.uid
const providedId = 'cNx7IuY6rZlR9mYSfb1hY7ROFY2'
const db = admin.firestore()
const user = await db.collection('user').get()
const uids = user.docs.map(doc => doc.data().userId)
const checkResult = check(uids, providedId, userId)
return { message: resultMsgs[checkResult] }
})
(I removed the seemingly-spurious db collection operation.)
Your forEach is iterating over all of the uuids, but result will be set to whatever the last comparison was. Perhaps this is correct, but:
If you're looking for any match, this is not what you want.
If you're looking for all matches, this is not what you want.
If you're looking to match the last UUID, it's what you want, but an odd way to go about it.
So:
If you want any matches, use... ahem any form of an any function.
If you want all matches, use any form of an all function.
If you want the first match, then just check the first element.
If you want the complete set of comparisons then you'll need to use map instead of forEach, and handle each result appropriately, whatever that means in your case.
In any event, I'd recommend breaking up your code more cleanly. It'll be much easier to reason about, and fix.

array.forEach works, but not when I nest another inside

I've got two pages I'm working on, and both return an array of objects. When I use the following code, the new results work:
this.adminService.waiversGetAll()
.subscribe((data: Waiver[]) => {
this.waivers = data;
this.waivers.forEach((e) => {
if(e.has_signed === true) {
e.url = `View`
} else {
e.url = `${e.message}`;
}
return e;
});
console.log(this.waivers);
})
}
But when I try to do the same thing with a different array (where I need to update the values of an array nested inside) I don't get updated values:
this.adminService.GetUnsignedWaivers()
.subscribe((data: Player[]) => {
console.log("data",data);
data.forEach(e => {
let record: Object = {};
for(let i = 0; i < e.waivers.length; i++) {
console.log(e.waivers[i].has_signed);
if (e.waivers[i].has_signed === true) {
e.waivers[i].url = e.waivers[i].signatureUrl;
console.log(e.waivers[i].url);
e.waivers[i].message = "View Waiver";
} else {
e.waivers[i].url = e.waivers[i].url;
e.waivers[i].message = e.waivers[i].message;
}
console.log(e.waivers[i].message);
return;
};
return e;
});
this.size = this.players.length;
console.log(this.players);
})
}
When I look at the console.log of e.waivers[i].has_signed, the data is correct, but after that it's not right.
What do I have to do to make this work? I've tried using a for loop inside the foreach, and a bunch of other stuff.
The data supplied to the loop provides info like:
{
buyer: "email#someaddress.edu"
event: "COED A"
field: "Main"
net: null
player: {shirtSize: null, avp_id: 12345678, adult: true, …}
team: null
waivers: [{
email: "someemail#gmail.com",
has_signed: true,
message: "Liability Waiver",
signatureUrl: "https://somelink.pdf",
url: "https://somelink.com/somekeyidentifier"
}
IF the player has signed the waiver, there will be a signatureUrl field and the message should say "View Waiver" instead of the message telling me what type of waiver they will sign. I want the url to be set to signatureUrl if they signed, so I can use it in a table that doesn't like manipulation of data.
A visual of what is returned in my table:
All I get is 1600 records showing the url as though everyone hasn't signed, but when I console.log has_signed in the inner loop, it's showing TRUE for the ones that should show a signatureUrl instead.

Quickly looking at it, you have a return statement within your for loop, which would stop it from running after the first iteration.

First of all drop all the return statements in your code. Next, use map instead of forEach as the former returns you the new manipulated array and the latter is used just for iteration purpose.
Your code within subscribe then becomes:
data.waivers = data.waivers.map((waiver) => {
if (waiver.has_signed) {
// your logic goes here...
waiver.url = waiver.signatureUrl;
waivers.message = "View Waiver";
}
// No else is required as you are just reassigning with same values
});
this.playerDetails = data;
At last bind this modified data in your template.

How to buffer an observable based on buffer content in rxjs?

I would like to flush a buffered observable based on the content of the buffer, but how to accomplish this? A simplified example of what I want to do:
observable.buffer(() => {
// Filter based on the buffer content.
// Assuming an observable here because buffer()
// needs to return an observable.
return buffer.filter(...);
})
Here is more specifically what I am trying to do with key events (bin here):
const handledKeySequences = ['1|2']
// Mock for document keydown event
keyCodes = Rx.Observable.from([1,2,3,4])
keyCodes
.buffer(() => {
/*
The following doesn't work because it needs to be an
observable, but how to observe what is in the buffer?
Also would like to not duplicate the join and includes
if possible
return function (buffer) {
return handledKeySequences.includes(buffer.join('|'));
};
*/
// Returning an empty subject to flush the buffer
// every time to prevent an error, but this is not
// what I want.
return new Rx.Subject();
})
.map((buffer) => {
return buffer.join('|')
})
.filter((sequenceId) => {
return handledKeySequences.includes(sequenceId);
})
.subscribe((sequenceId) => {
// Expecting to be called once with 1|2
console.log("HANDLING", sequenceId)
})
I feel like my approach is wrong, but I can't figure out what the right approach would be. I've tried using scan, but that scans all the events in the observable, which is not what I want.
Thanks for any help!

This should be doable with bufferWithCount:
const handledKeySequences = ['1|2']
// Mock for document keydown event
keyCodes = Rx.Observable.from([0,1,2,3,4]);
const buffer$ = keyCodes
.bufferWithCount(2, 1) // first param = longest possible sequence, second param = param1 - 1
.do(console.log)
.map((buffer) => {
return buffer.join('|')
})
.filter((sequenceId) => {
return handledKeySequences.includes(sequenceId);
});
buffer$.subscribe((sequenceId) => {
console.log("HANDLING", sequenceId)
});
See live here.
Also have a look at this question.

It seems that this functionality is not currently available in Rxjs, so as suggested by #olsn I wrote a custom operator that works by passing a function to tell when to flush the buffer:
(function() {
// Buffer with function support.
function bufferWithContent(bufferFn) {
let buffer = [];
return this.flatMap(item => {
buffer.push(item);
if (bufferFn(buffer)) {
// Flush buffer and return mapped.
let result = Rx.Observable.just(buffer);
buffer = [];
} else {
// Return empty and retain buffer.
let result = Rx.Observable.empty();
}
return result;
});
}
Rx.Observable.prototype.bufferWithContent = bufferWithContent;
})();
I also opened an issue here that proposes adding this functionality.