Firebase firestore WEB v.9 retrieve data ID-s from collection where that current user ID contains-CodePudding

I am trying to retrieve specific data from firebase, in my redux store I have uniq id that I can get in any page like this

const currentUser = useSelector(selectLoggedInUser); 
console.log(currentUser.id) // "71dc954d-d2a4-4892-8257-98696fe776cd" this is peace of doc name in "dms" collection

I want all doc-s that contains this ID "71dc954d-d2a4-4892-8257-98696fe776cd", how can I query it??? This is how I'm setting "dms" messages

export const sentDirectMsg = async ({ toUid, currentUid, message, name }) => {
  const collecitonRef = await dmCollection(toUid, currentUid);
  await addDoc(collecitonRef, {
    timestamp: serverTimestamp(),
    message,
    name,
  });
};

const dmCollection = async (toUid, currentUid) => {
  const idPair = [currentUid, toUid].sort().join("_");
  return collection(db, "dms", idPair, "messages");
};

CodePudding user response：

If your data model is centered toward users being identified through their unique IDs, then you can store your data first hand to reflect his model:

const userData = {
  name: 'Marouane',
  state: 'BN',
  country: 'TUN'
};

// Add the user document in collection `dms`, with the id being the user ID
const res = await db.collection('dms').doc('71dc954d-d2a4-4892-8257-98696fe776cd').set(userData);

You can then query the user document using its unique identifier:

const userRef = db.collection('dms').doc('71dc954d-d2a4-4892-8257-98696fe776cd');
const doc = await userRef();
if (!doc.exists) {
  console.log('No such user!');
} else {
  console.log('User dms data:', doc.data());
}

CodePudding user response：

Edited:

If I understood correctly, you want to get a document which id contains a part of the id you are looking for.

Using array-contains should do the trick:

const dmsRef = collection(db,"dms"); 
const docRef = query(dmsRef, where("idPair", "array-contains", id)); //for example id = "71dc954d-d2a4-4892-8257-98696fe776cd"

const docSnap = await getDoc(docRef);

if (docSnap.exists()) {
  console.log("Document data:", docSnap.data());
} else {
  // doc.data() will be undefined in this case
  console.log("No such document!");
}

I based my example on this link from the official documentation.