Add a Lambda Connector

Introduction

You can add a lambda connector just like any other data source.

Add a connector

Initialize a new connector in a project directory:

ddn connector init <your_name_for_the_connector> -i

TypeScript

When you add the hasura/nodejs connector, the CLI will generate a Node.js package with a functions.ts file. This file is the entrypoint for your connector.

As this is a Node.js project, you can easily add any dependencies you desire by running npm i <package-name> from this connector's directory.

Python

When you add the hasura/python connector, the CLI will generate a Python application with a functions.py file. This file is the entrypoint for your connector.

As this is a Python project, you can easily add any dependencies you desire by adding them to the requirements.txt in this connector's directory.

Go

When you add the hasura/go connector, the CLI will generate a Go application with a /functions directory. The connector will use this directory — and any *.go file in it — as the entrypoint for your connector.

As this is a Go project, you can easily add any dependencies you desire by adding them to the go.mod file and running go mod tidy from this connector's directory.

Customization

You can customize which subgraph this connector is added to by changing your project's context or using flags. More information can be found in the CLI docs for the ddn connector init command.

Next steps

After adding a connector, learn how to add custom business logic written in your language of choice and expose it via your API.