Question 120839 in Firebase Question posted in
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Firebase resolve Promise

I’m starting in the world of promises and there is one thing I can’t understand.

I am trying to make a system that returns a document from a Firebase collection by its ID.

For this I use 2 functions

 const getProductDataById = async(idProduct)=> {
    
        const docSnap = await getDoc(doc(db, "products", idProduct));
        if (docSnap.exists()) {
            return docSnap.data();       
        } 
        else {  
            console.log("No such document!"); 
        }
    }


    const getProduct = (idProduct)=>{
        
        let ProductDataPromise = getProductDataById (idProduct);
        
        //I don't know how resolve Promise

        return ProductData;
       
        
    }

The problem is that I don’t know in the second how to resolve the Promise so that this function returns the desired object.

Thanks!!

Tags:

2

Answers


  1. 0

    You should be able to just await the call to the first function:

    const getProduct = async (idProduct)=>{
  let ProductData = await getProductDataById(idProduct);
  // Do something with ProductData?
  return ProductData;      
}

    Of course, if you’re not doing anything with ProductData, then this is equivalent to just calling getProductDataById directly.

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  2. 0

    I was experiencing the same problem.
    Maybe you’ve already solved it… but here’s my example:

    async function login({email, password}: RegisterAndLoginData) {
    await signInWithEmailAndPassword(auth, email, password)
        .then(===>async<===(data) => {
            const uidDocUsers = data.user.uid;
            const docRef = doc(db, "users", uidDocUsers);

            //returns only array with user data
            const getNameUser ===>await<=== getDoc(docRef)
                .then((data) => {
                    ===>return data.data().name<=== //I just wanted a specific data, name

                }) 
                
            console.log("Document data:", getNameUser);

            // console return: Document data: "Bianca :D"
        })
        .catch((error) => {...}

    Always be careful and analyze very well where to put async/await

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