Firestore 正在删除最后一个文档而不是我选择的文档

Question

I am trying to impelement a delete function in Firestore database and the problem is that when I click delete, it deletes the last document created, not the one that I want to delete. This is how I get the data from the database:

db.collection("flights").get().then((snapshot) =>{ 
   snapshot.docs.forEach(doc => {
   var data = doc.data();
   var docID = doc.id;
   

And this is how I am trying to delete it:

function deleteFlight(docID){
   firebase.firestore()
  .collection("flights")
  .doc(docID)
  .delete()
  .then(() => console.log("Document deleted")) // Document deleted
  .catch((error) => console.error("Error deleting document", error));
}

I want to specify that after I create a new document, the website is refreshed, so I think it loses somehow the document id.

Answer 1

In the comment section you have specified that you are calling the deleteFlight() function from a html button. As you are using forEach() loop after getting the collection of documents and within that populating docID , by the time the html button is clicked the forEach() loop would have been completed and then docID will have the document id of the document which comes last in ascending order because by default the documents are sorted in ascending order of document id as mentioned in this document . In your case I suspect the document id for the recently added document comes last when sorted in ascending order. This is the reason the recently added document is getting deleted.

I am not sure of your use case. But I would suggest you to declare a variable outside of the db.collection() method and implement some logic according to your use case to populate it with the document id which you want to delete. Then use that variable in the deleteFlight() function.