Functions

Membrane Functions implement business logic inside Membrane Elements.

Function Types

Functions can be implemented in one of the following ways depending on where the function is used:

Core Implementation Function Types

• Mapping – Transform input data using JSONata expressions without making API calls
• REST API Mapping – Map to REST API endpoints
• JavaScript – Write custom code for maximum flexibility
• GraphQL API Mapping – Map to GraphQL API endpoints

Data Collection Action Function Types

• list-data-records – List records in a data collection page by page
• find-data-record-by-id – Find a record in a data collection by ID
• search-data-record – Search data records by a query string
• match-data-record – Find a data record with fields matching a query
• create-data-record – Create a new data record
• update-data-record – Update an existing data record
• delete-data-record – Delete a data record by id

API Request Action Function Types

• api-request-to-external-app – Make API requests to the external service
• api-request-to-your-app – Make API requests to your internal API
• http-request – Make arbitrary HTTP requests to any endpoint

Code Execution Action Function Types

• JavaScript – Run custom JavaScript/TypeScript code (includes run-javascript action type)

Flow Node Function Types

• run-action – Run predefined actions

Special Function Types

• not-supported – Mark function as not supported by the external API