如何使用 Koltin 从 Firestore 中的 ArrayList 中删除项目

Question

I want to delete one item from the animeId . For example, if I need to remove the animeId[5] or I want to remove the item that the value is equal 5114 , how can I do that? I alredy learned how I remove item like the entire animeId but not just one item. Here's an print how the database is organized:

Answer 1

For updating some fields of a document, use the update() method.

If you want to remove a specific item from an Arraylist, you can use a call to:

.update("arrayfield", FieldValue.arrayRemove("itemtoremove"))

For example if you have an arraylist that contains three items as “abc”, “efg”, “xyz”. And if you want to remove specific item called “efg” from an arraylist you should use a call to:

.update("arrayfield", FieldValue.arrayRemove("efg"))

Please also take a look at this Stackoverflow Link which explains clearly on how to remove specific items from the array list in the firestore using kotlin.