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VistasHow i can query my subCollection on firestore?
I wanna query only the users with the subcollection Favoris (not everyUsers had a favoris subcollection) and I wanna query only the document from favoris with the same id as the current user.
I did the following function but I have no document found. I'm supposed to have one. Did I forget something?
const getFavoris = () => {
userDB.doc()
.collection('favoris')
.where('id', '==', currentUser.id)
.get()
.then((querySnapshot) => {
console.log('cmb', querySnapshot.size);
querySnapshot.forEach((doc) => {
console.log(doc.id);
});
});
};
also an example of my DB user and subcollection Favoris
·
Juan Pablo Isaza
1 Respuestas
Responde la pregunta0
Since "favoris" is a subcollection, instead of using a collection() call, you should use a collectionGroup() query like in the following lines of code:
const getFavoris = () => {
firebase.firestore()
.collectionGroup('favoris') //👈
.where('id', '==', currentUser.id)
.get()
.then((querySnapshot) => {
console.log('cmb', querySnapshot.size);
querySnapshot.forEach((doc) => {
console.log(doc.id);
});
});
};
Besides that, don't forget to create the corresponding index.
·
Juan Pablo Isaza
Denunciar
Responde la pregunta