Deleting all documents in Firestore collection

Question

I\'m looking for a way to clear an entire collection. I saw that there is a batch update option, but that would require me to know all of the document IDs in the collection.

Answer 1

The following javascript function will delete any collection:

deleteCollection(path) {
    firebase.firestore().collection(path).listDocuments().then(val => {
        val.map((val) => {
            val.delete()
        })
    })
}

This works by iterating through every document and deleting each.

Alternatively, you can make use of Firestore's batch commands and delete all at once using the following function:

deleteCollection(path) {
    // Get a new write batch
    var batch = firebase.firestore().batch()

    firebase.firestore().collection(path).listDocuments().then(val => {
        val.map((val) => {
            batch.delete(val)
        })

        batch.commit()
    })
}