let savedArrayUID = []; let savedArrayEmails = [];
function pullIt(emailSearch) {
db.collection(collectionName).where('email', '==', emailSearch).get()
.then((querySnapshot) => {
querySnapshot.forEach((doc) => {
savedArrayUID.push(doc.id);
savedArrayEmails.push(doc.data());
// doc.data() is never undefined for query doc snapshots
console.log(doc.id, " => ", doc.data());
// saved. push(doc.id);
return savedArrayUID;
})
});
}
I can query the data from the database but cannot pull the variable out of the scope of the function. I want to use this function to pass through emails to find info of their profile saved in my Database.
I really struggle to understand how Promiseses can help here. I have a feeling this is already solved, but I could not find an answer anywhere.
There's two steps to this:
pullIt (as a promise).pullIt correctly, waiting for the promise to resolve.In code, you're missing a top-level return the pullIt code:
function pullIt(emailSearch) {
// 👇
return db.collection(collectionName).where('email', '==', emailSearch).get()
.then((querySnapshot) => {
querySnapshot.forEach((doc) => {
savedArrayUID.push(doc.id);
savedArrayEmails.push(doc.data());
})
return savedArrayUID; // 👈
});
}
And then when calling pullIt, you'll need to use either await or then, to ensure pullIt completed before you try to access the result.
So either:
pullIt("yourSearchTeam").then((results) => {
// TODO: use your results here
})
Or (in an async context):
const results = await pullIt("yourSearchTeam")
// TODO: use your results here