FieldValue.arrayRemove() to remove all objects from an array in firestore-CodePudding

I am creating a flutter app and there is a User model which contains name,email,uid and cart. I have created a CartController extends GetxController to add items to cart and remove a particular item from cart. However, I need to create a function which deletes all the items from the cart which contains cart item as objects. I know that a particular cart item can be removed using FieldValue.arrayRemove() but I want to know how can i delete all the elements from the array.

CodePudding user response：

You can use the .clear() on the array variable.

Try

FieldValue.clear()

CodePudding user response：

You are essentially trying to set cart array to an empty array. You can just use update method as in the documentation:

final docRef = db.collection("collection").doc("docId");

docRef.update({"cart": []}).then(
    (value) => print("DocumentSnapshot successfully updated!"),
    one rror: (e) => print("Error updating document $e"));