Hello, in this video, I’ll show you how to update documents in Firestore using the FBP Firebase Plugin for Unreal Engine.
Setup
Auth - Create Account with Email and Password
Auth - Sign In
Auth - Reset Passwords
Auth - Listening to Sign-In States
Auth - Verifying Users
Auth - Utility Nodes
Firestore - Add Documents
Firestore - Update Document
Firestore - Delete Document
Firestore - Get Document
Firestore - Get Collection
Firestore - Batch Operations
Realtime Database - Add Data
Realtime Database - Update Data
Realtime Database - Delete Data
Realtime Database - Get Data
Cloud Storage - Download File
Cloud Storage - Uploading Files
Cloud Storage - Delete File
Packaging your Project
Firestore - Update Document
Learning the design flow to update documents to Firestore in FBP
To update a document in Firebase using the FBP Firebase Plugin
(1) First, create the document using a series of nodes provided by the plugin
(2) Update the document by using the “Update Document” node
Below is a sample workflow of updating a document.
Creating a Document
To begin creating the document, use the “Begin Write Document” node.
Then, add data to it by calling these available nodes:
(1) Add String
(2) Add Number
(3) Add Boolean
(4) Add String Array
(5) Add Number Array
(6) Add Boolean Array
(7) Add Map
Updating the Document
Once the document is created, use the “Update Document” node and connect the Document object returned by the last add node to the Document pin.
For the Document Path, create a String array and set it into the Document Path pin. Every even element represents a collection, and every odd element represents a document.
The Path should point to a document reference in Firestore for the node to work.
In the sample below, it will update a document in the “users” collection.
Callback functions
The Add Document function has 2 callback pins used to handle events after the operation is completed.
When the Document is updated successfully, it will call the On Document Updated callback and when it fails, it will call the On Fail to Update Document callback.
To create these callbacks, click and hold on the callback pin from the node. Then drag and let go on an empty spot on the blueprint.
Select “Add Event” then “Add Custom Event.” That will create the event node fit for the callback.
