Hello, in this tutorial, I will show you how to get data with the FBP Firebase Plugin for Unreal Engine.
To get data, use the “Get Data” node.
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
Realtime Database - Get Data
Using the "Get Data" node to get data in Realtime Database.
Then set the path to the Data you want get using the Data Path pin.
Lastly, add the callbacks by clicking and holding on the pin. Then drag to an empty space in the blueprint.
The On Value Received callback gets called when the value is retrieved from the Realtime Database. It returns a Data Snapshot object that we can use to get contents from the data using a series of Get nodes provided in the plugin.
The On Fail to Get Value callback gets called when it failed to get the data.
Getting the Contents from the Data
Once the setup is completed, use one or more of these Get nodes in the plugin to get the contents from the Data Snapshot.
• Get String
• Get Number
• Get Boolean
• Get String Array
• Get Number Array
• Get Boolean Array
• Get Map
If your data is just a single value entity, use Get String if it is a string, Get Number if it is a number and so on.
Since the path to the data is a single valued, the key should match with the last element in the Data Path array.
If it contains multiple data like this in Realtime Database:
Then you must use Get Map and then followed by the Get Nodes to get the data.
The example shows how to get data from the Map.
Attaching a listener
The "Get Data" node will only get the data once per use. If you want to continuously get updates from the data, use the "Listen to Value" node.
To set it up, set the path to the data you want to listen to using the Data Path pin.
Then, add the callbacks by clicking and holding on the pin. Then drag to an empty space in the blueprint.
The On Value Changed callback gets called once at the beginning to get the data. Then it’ll get called every time an update is made to it. Use the Data Snapshot object returned from it to get the data.
The On Cancel Value Listener gets called when there is an error that occurred during the process or when the listener is terminated.
Getting the Contents from the Listener
Once the setup is completed, use one or more of these Get nodes in the plugin to get the contents from the Data Snapshot.
If your data is just a single value entity, use Get String if it is a string, Get Number if it is a number and so on.
Since the path to the data is a single valued, the key should match with the last element in the Data Path array.
If it contains multiple data like this in Realtime Database:
Then you must use Get Map and then followed by the Get Nodes to get the data.
