如何删除firestore中自动生成的id数据

Question

async created () {
    const sn = await db.collection('forms').get()
    sn.forEach(v => {
      const { title, content } = v.data()
      this.forms.push({
        title, content, id: v.id
      })
      console.log(v.id)
    })
  },
  del () {
    db.collection('forms').doc().delete()
  }
}

I succeeded in reading the data and getting an ID. But I don't know what to put in the doc() to delete.

Answer 1

If you knew the ID of the document then it would have been as easy as this:

firebase.firestore().collection("forms").doc("docId").delete()

But in your case, you would have to add an additional step of getting the document ID. I'm not sure about your db structure but for example, let's say you want to delete a form submitted by a user named "john" (you must store the name in document). Then you can fetch the document (and it's ID) this way:

const formDoc = await firebase.firestore().collection("forms").where("name", "==", "john").get()
if (formDoc.exists) {
  await firebase.firestore().collection("forms").doc(formDoc.id).delete()
}

Again the name may not be unique so it's better to rely on user UIDs for this. If you are using Firebase Authentication then please add a field in document called uid having the value of user's UID in it. Then you can use UID instead of name in the query.