Cloud functions

1. I want to read the document and edit some fields to add it as a new document. How can I do that?

const newData = value.data(); //<<< field modification

2. And can I use copyWith ?

Code:

exports.productCopy = functions.https.onCall( async (data, context)=>{

    const uid = context.auth.uid;

 



    data.selectedProductId.forEach((docId){
        const productRef = admin.firestore()
                 .collection('products')
             
                 .doc(docId);
        const newProductRef = admin.firestore()
                         .collection('products')
                  
                         .doc();

        const product = await productRef.get().then((value)=>{
            const newData = value.data();

            newProductRef.add(value.data())
        });



    });


    return {status:'success', isError: false};


});

CodePudding user response：

First, is good to know that each document is immutable, after you get a document in a variable you can modify that variable, and then you will need to put/update/patch the new document.

I meant you need to do 2 API calls, to save correctly the document in your database.

CodePudding user response：

You can't really use await in forEach block. If you want to wait for multiple actions, use Promise.all().

It should be something like this:

exports.productCopy = functions.https.onCall((data, context) => {
    const uid = context.auth.uid;

    const promises = data.selectedProductId.map((docId) => {
        return admin.firestore() //