4. Logic & Custom Functions Implementation
Learn about Actions that make your app dynamic and how to write Custom Code to handle more complex requirements.
4.1. Structuring Action Flows
Link actions to widget events (e.g., On Tap) to perform various tasks like writing to Firestore, navigating pages, or updating variables.
# Typical Action Chain
1. On Tap -> 2. Validate Form
2. If Validation Success -> 3. Firestore Create Document
3. After Firestore Write -> 4. Navigate To Home Page4.2. Writing Custom Functions
When specific calculations or complex data manipulation are needed that FlutterFlow doesn't cover, use the Custom Functions feature to write direct Dart code that can be used within your app.
Note: Custom Functions are executed at the time of compilation, so ensure they are free from runtime errors.
4.3. External API Integration
Configure a RESTful API to fetch data from (GET) or send data to (POST) external servers. Mapping the API response to the required data fields using JSON Path is a crucial step.