Summary: TypeORM connects to Lakebase Postgres by setting DataSource type to postgres, supplying the Lakebase Postgres connection string via DATABASE_URL, and enabling ssl: true. Serverless deployments should use a pooled connection string (add -pooler to the endpoint ID) to handle high concurrency without exhausting connections. To prevent timeouts from Lakebase Postgres idle-compute cold start (default 5 minutes), add connect_timeout=10 to the connection string.

Learn how to connect to Lakebase Postgres from TypeORM

Pre-built prompt for connecting Node.js applications to Lakebase Postgres using TypeORM. View prompt

TypeORM is an open-source ORM that lets you to manage and interact with your database. This guide covers the following topics:

• Connect to a database on Neon from TypeORM
• Use connection pooling with TypeORM
• Connection timeouts

To establish a basic connection from TypeORM to a database on Neon, perform the following steps:

1. Retrieve your database connection string. You can find the connection string for your database by clicking the Connect button in the Console nav. Select a branch, a user, and the database you want to connect to. A connection string is constructed for you. The connection string includes the user name, password, hostname, and database name.

2. Update the TypeORM's DataSource initialization in your application to the following:

   import { DataSource } from 'typeorm';export const AppDataSource = new DataSource({  type: 'postgres',  url: process.env.DATABASE_URL,  ssl: true,  entities: [    /*list of entities*/  ],});

3. Add a DATABASE_URL variable to your .env file and set it to the Neon connection string that you copied in the previous step. We also recommend adding ?sslmode=require&channel_binding=require to the end of the connection string to ensure a secure connection.

   Your setting will appear similar to the following:

   DATABASE_URL="postgresql://[user]:[password]@[neon_hostname]/[dbname]?sslmode=require&channel_binding=require"

Tip: TypeORM leverages a node-postgres Pool instance to connect to your Postgres database. Installing pg-native and setting the NODE_PG_FORCE_NATIVE environment variable to true switches the pg driver to pg-native, which, according to some users, produces noticeably faster response times.

Serverless functions can require a large number of database connections as demand increases. If you use serverless functions in your application, we recommend that you use a pooled Neon connection string, as shown:

# Pooled Neon connection string
DATABASE_URL="postgresql://alex:AbC123dEf@ep-cool-darkness-123456-pooler.us-east-2.aws.neon.tech/dbname?sslmode=require&channel_binding=require"

A pooled Neon connection string adds -pooler to the endpoint ID, which tells Neon to use a pooled connection. You can add -pooler to your connection string manually or copy a pooled connection string from the Connect to your branch modal, which you can access by clicking Connect in the Console nav. Enable the Connection pooling toggle to add the -pooler suffix.

Important: Use a pooled connection string for your application at runtime, but use a direct (non-pooled) connection string when running TypeORM migrations. Neon's pooled connection uses PgBouncer in transaction mode, which doesn't support all session-level operations that migration tools rely on, so running migrations over a pooled connection can lead to errors. See Connection pooling.

A connection timeout that occurs when connecting from TypeORM to Neon causes an error similar to the following:

Error: P1001: Can't reach database server at `ep-white-thunder-826300.us-east-2.aws.neon.tech`:`5432`
Please make sure your database server is running at `ep-white-thunder-826300.us-east-2.aws.neon.tech`:`5432`.

This error most likely means that the TypeORM query timed out before the Neon compute was activated.

A Neon compute has two main states: Active and Idle. Active means that the compute is currently running. If there is no query activity for 5 minutes, Neon places a compute into an idle state by default.

When you connect to an idle compute from TypeORM, Neon automatically activates it. Activation typically happens within a few seconds but added latency can result in a connection timeout. To address this issue, you can adjust your Neon connection string by adding a connect_timeout parameter. This parameter defines the maximum number of seconds to wait for a new connection to be opened. The default value is 5 seconds. A higher setting may provide the time required to avoid connection timeouts. For example:

DATABASE_URL="postgresql://[user]:[password]@[neon_hostname]/[dbname]?sslmode=require&channel_binding=require&connect_timeout=10"

Note: A connect_timeout setting of 0 means no timeout.

• Set up Managed Better Auth: Add managed authentication that branches with your database
• Add Object Storage: S3-compatible file storage that branches with your database
• Deploy a Function: Run backend compute next to your database, no separate hosting needed
• Call an LLM with AI Gateway: Access foundation models from Anthropic, OpenAI, Google, and more with one credential

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• Better Drizzle

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