How to use where and update [duplicate]

问题

This question already has answers here:

update cloud firestore document without id (1 answer)

Way to query and update data in Firestore (1 answer)

Closed 6 months ago.

I'm trying to do this:

database.collection('UsuariosDev').where('Telefono', '==', textInput.current.value)
    .update({
        citas: firebase.firestore.FieldValue.arrayUnion(database.doc('NegociosDev/Peluquerías/Negocios/PR01/citas/' + docRef.id))
})

Get the doc from the collection "UsuariosDev" where "Telefono" equals "textInput.current.value", and then update it. But it seems like I can't use "update" next to "where". Any ideas?

回答1:

Firestore doesn't support update queries. To update a document you need to know its full path. So to update all documents matching a query, you'll need to:

1. Execute that query against the database
2. Loop over the resulting documents
3. Update each document in turn

Also see:

• Way to query and update data in Firestore
• update cloud firestore document without id

来源：https://stackoverflow.com/questions/63173304/how-to-use-where-and-update