This is the official EdgeDB client library
for JavaScript and TypeScript.

If you’re just getting started with EdgeDB, we recommend going through the
EdgeDB Quickstart first. This walks
you through the process of installing EdgeDB, creating a simple schema, and
writing some simple queries.

Requirements

• Node.js 18+
• For TypeScript users:
  • TypeScript 4.4+ is required
  • yarn add @types/node --dev

Installation

npm install edgedb      # npm users
yarn add edgedb         # yarn users

EdgeDB 2.x requires v0.21.0 or later

Basic usage

The examples below demonstrate only the most fundamental use cases for this
library. Go to the complete documentation site. >

Create a client

A client is an instance of the Client class, which maintains a pool of
connections to your database and provides methods for executing queries.

For TypeScript (and Node.js+ESM)

import * as edgedb from "edgedb";

const client = edgedb.createClient();

For Node.js (CommonJS)

const edgedb = require("edgedb");

const client = edgedb.createClient();

Configuring the connection

The call to edgedb.createClient() doesn’t require arguments, as the library
can determine how to connect to your database using the following mechanisms.

1. For local development: initialize a project with the edgedb project init
   command. As long as the file is within a project directory, createClient
   will be able to auto-discover the connection information of the project’s
   associated instance. For more information on projects, follow the
   Using projects guide.

2. In production: configure the connection using environment variables.
   (This can also be used during local development if you prefer.) The easiest
   way is to set the EDGEDB_DSN variable; a DSN (also known as a “connection
   string”) is a string of the form
   edgedb://USERNAME:PASSWORD@HOSTNAME:PORT/DATABASE.

For advanced cases, see the
DSN specification and
Reference > Connection Parameters.

Run a query

The remainder of the documentation assumes you are using ES module (import)
syntax.

import * as edgedb from "edgedb";

const client = edgedb.createClient();
await client.query("select 2 + 2"); // => [4]

Note that the result is an array. The .query() method always returns an
array, regardless of the result cardinality of your query. If your query
returns zero or one elements, use the .querySingle() instead.

// empty set, zero elements
await client.querySingle("select <str>{}"); // => null

// one element
await client.querySingle("select 2 + 2"); // => 4

// one element
await client.querySingle(
  `select Movie { title }
  filter .id = <uuid>'2eb3bc76-a014-45dc-af66-2e6e8cc23e7e';`,
); // => { title: "Dune" }

Generators

Install the @edgedb/generate package as a dev dependency to take advantage of EdgeDB’s built-in code generators.

npm install @edgedb/generate  --save-dev      # npm users
yarn add @edgedb/generate --dev               # yarn users

Then run a generator with the following command:

$ npx @edgedb/generate <generator> [FLAGS]

The following <generator>s are currently supported:

• queries: Generate typed functions from *.edgeql files
• interfaces: Generate interfaces for your schema types
• edgeql-js: Generate the query builder

queries

Run the following command to generate a source file for each *.edgeql system in your project.

$ npx @edgedb/generate queries

Assume you have a file called getUser.edgeql in your project directory.

// getUser.edgeql
select User {
  name,
  email
}
filter .email = <str>$email;

This generator will generate a getUser.query.ts file alongside it that exports a function called getUser.

import {createClient} from "edgedb";
import {myQuery} from "./myQuery.query";

const client = createClient();

const user = await myQuery(client, {name: "Timmy"});
user; // {name: string; email: string}

The first argument is a Client, the second is the set of parameters. Both the parameters and the returned value are fully typed.

edgeql-js (query builder)

The query builder lets you write queries in a code-first way. It automatically infers the return type of your queries.

To generate the query builder, install the edgedb package, initialize a project (if you haven’t already), then run the following command:

$ npx @edgedb/generate edgeql-js

This will generate an EdgeQL query builder into the ./dbschema/edgeql-js
directory, as defined relative to your project root.

For details on generating the query builder, refer to the complete documentation. Below is a simple select query as an example.

import { createClient } from "edgedb";
import e from "./dbschema/edgeql-js";

const client = createClient();
const query = e.select(e.Movie, (movie) => ({
  id: true,
  title: true,
  actors: { name: true },
  num_actors: e.count(movie.actors),
  filter_single: e.op(movie.title, "=", "Dune"),
}));

const result = await query.run(client);
result.actors[0].name; // => Timothee Chalamet

For details on using the query builder, refer to the full query builder docs.

Contribute

Contributing to this library requires a local installation of EdgeDB. Install
EdgeDB from here or
build it from source.

$ git clone [email protected]:edgedb/edgedb-js.git
$ cd edgedb-js
$ yarn                # install dependencies
$ yarn run build      # build all packages
$ yarn run test       # run tests for all packages

In order to be able to run all tests you need to have edgedb-server in your
path. This can be done by either running tests from within a Python 3.12
virtual environment (you will have it if you built EdgeDB locally), or by
installing
specific EdgeDB version and then adding its binary path to the EDGEDB_SERVER_BIN environment variable.
Check here
to find how to get the binary path.

License

edgedb-js is developed and distributed under the Apache 2.0 license.