1

I have to documents in firestore one is user document and one is tweet document. I am trying to replicate the twitter clone. So my user has follower array. I want to display the user its tweet and its follower tweet. User collection is : 

{
name:test,
email:[email protected],
follower:[[email protected],[email protected]]
}

Tweet Collection is:

{
text:Dummy tweet,
by:[email protected],
img:dummyImageSource
}

I am not able to figure out. If I am logged in with [email protected] and I have one follower (let's say [email protected]). How will i need to query to fetch comment of mine([email protected]) and all the follower(in this case [email protected]).

I have tried doing something like this : 

db.collection("tweets")
            .where("email", "==", this.state.user.email)//loggedin email
        //need to add follower condition as well here so that i get combined tweet

            .orderBy("created", "asc")
            .onSnapshot(snapshot => {
                let oldArr = [];
                console.log(snapshot.docs)
                snapshot.docs.forEach(doc => {
                 console.log(doc)
                });
Shubham Verma
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1 Answers1

1

You need to make two (or more) queries to the tweets collection.

One for your user, and one for each of the user's followers.

Also note on the query condition the collection field is "by" not "email"

Like so: 

const makeTweetQueryListener = (email) => db.collection("tweets")
            .where("by", "==", email)
            .orderBy("created", "asc")
            .onSnapshot()

Promise.all([
   makeTweetQueryListener(this.state.user.email)
].concat(this.state.user.followers.map(makeTweetQueryListener))
).then(values => {
    values.forEach(query => {
        query.docs.forEach(console.log)
    });
})

EDIT - changed the code above to add a listener instead of just querying

Carlos Sá
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