Migration to v1

This is the migration guide for upgrading from version 0.3.x to 1.0.

JavaScript and Node.js versions

The lowest JavaScript version supported is now ES2023, which means Node 20 and later is supported. If you are using a platform that does not support ES2023, please upgrade.

Client libraries

TypeORM requires newer versions of the database client libraries.

MySQL / MariaDB

connectorPackage

The connectorPackage option was removed, together with the support for the old mysql client. The only database client supported is now mysql2, which TypeORM will try to load by default. If you were using mysql in your project, simply replace it with mysql2.

legacySpatialSupport default changed to false

The legacySpatialSupport option now defaults to false, meaning TypeORM uses the standard-compliant ST_GeomFromText and ST_AsText spatial functions introduced in MySQL 5.7 and required by MySQL 8.0+. The legacy GeomFromText and AsText functions were removed in MySQL 8.0.

If you are running MySQL 5.6 or earlier and rely on spatial types, set legacySpatialSupport: true explicitly:

new DataSource({
    type: "mysql",
    legacySpatialSupport: true,
    // ...
})

width and zerofill column options removed

MySQL 8.0.17 deprecated display width for integer types and the ZEROFILL attribute, and MySQL 8.4 removed them entirely. TypeORM no longer supports the width and zerofill column options. If you were using these options, remove them from your column definitions:

// Before
@Column({ type: "int", width: 9, zerofill: true })
postCode: number

// After
@Column({ type: "int" })
postCode: number

If you need zero-padded display formatting, handle it in your application layer using String.prototype.padStart() or the MySQL LPAD() function in a raw query. The unsigned option for integer types is not affected by this change and continues to work as before.

SAP HANA

Several deprecated SAP HANA connection aliases were removed.

• hanaClientDriver was removed. Use driver.
• pool.max was removed. Use pool.maxConnectedOrPooled.
• pool.requestTimeout was removed. Use pool.maxWaitTimeoutIfPoolExhausted.
• pool.idleTimeout was removed. Use pool.maxPooledIdleTime (seconds).
• pool.min, pool.maxWaitingRequests, and pool.checkInterval were removed with no replacement.

Also note the default behavior changes in pool configuration:

• pool.maxPooledIdleTime now defaults to 30 seconds and no longer falls back to pool.idleTimeout.
• pool.maxWaitTimeoutIfPoolExhausted now defaults to 0 and no longer falls back to pool.requestTimeout.

SQLite

Drop support to sqlite3 in favour of better-sqlite3 as the primary driver for sqlite databases:

new DataSource({
    type: "better-sqlite3", // was "sqlite"
    database: "db.sqlite",
})

flags option removed

The sqlite3 package accepted C-level open flags (OPEN_URI, OPEN_SHAREDCACHE, etc.). better-sqlite3 does not support this — use the dedicated options instead:

• readonly for read-only mode
• enableWAL for WAL journal mode

busyTimeout option renamed to timeout

The sqlite3 package used busyTimeout to configure SQLite's busy timeout. better-sqlite3 uses timeout instead (default: 5000ms). Update your DataSource options accordingly:

new DataSource({
    type: "better-sqlite3",
    database: "db.sqlite",
    timeout: 2000, // was `busyTimeout` in sqlite3
})

MongoDB

Deprecated connection options removed

The following MongoDB connection options have been removed:

Removed option	Action
appname	Use appName (camelCase) instead
fsync	Use writeConcern: { journal: true } instead
j	Use writeConcern: { journal: true } instead
useNewUrlParser	Remove — no-op since MongoDB Driver v4.0
useUnifiedTopology	Remove — no-op since MongoDB Driver v4.0
wtimeout	Use writeConcern: { wtimeoutMS: 2500 } instead

getMongoRepository and getMongoManager globals

The deprecated global functions getMongoRepository() and getMongoManager() have been removed. Use the corresponding instance methods on DataSource or EntityManager instead:

// Before
import { getMongoManager, getMongoRepository } from "typeorm"

const manager = getMongoManager()
const repository = getMongoRepository(User)

// After
const manager = dataSource.mongoManager
const repository = dataSource.getMongoRepository(User)

Types

The internal MongoDB types are no longer exported. You can import ObjectId from mongodb instead of typeorm.

Expo

Support for the legacy Expo SQLite driver has been removed. The legacy API was removed by Expo in SDK v52, so you'll need to use Expo SDK v52 or later with the modern async SQLite API.

Hashing

Historically TypeORM used a non-standard SHA-1 implementation for hashing. This has been changed to use the built-in crypto module from Node.js.

For browser environments RandomGenerator.sha1 was fixed to the standard implementation.

Glob patterns

Glob patterns are now handled by tinyglobby instead of glob. While tinyglobby is almost a drop-in replacement for glob, there might be certain cases in which the behavior is different.

Removed deprecations

Connection vs DataSource

DataSource replaced Connection in v0.3 to provide a better meaning to the abstract concept represented by this class. For backwards compatibility, Connection was kept as an alias to DataSource, now this alias was removed. Similarly, ConnectionOptions is now DataSourceOptions.

In addition, the old method names of the DataSource class have been removed, so Connection.connect() is now only DataSource.initialize(), Connection.close() is DataSource.destroy() etc.

Global convenience functions

The following deprecated global functions have been removed:

• createConnection / createConnections
• getConnection
• getConnectionManager
• getConnectionOptions
• getManager
• getSqljsManager
• getRepository
• getTreeRepository
• createQueryBuilder

Use the equivalent methods on your DataSource instance instead. For example:

// Before
const repo = getRepository(User)
const qb = createQueryBuilder("user")

// After
const repo = dataSource.getRepository(User)
const qb = dataSource.createQueryBuilder("user")

ConnectionManager

The ConnectionManager class has been removed. If you were using it to manage multiple connections, create and manage your DataSource instances directly instead.

AbstractRepository, @EntityRepository, and getCustomRepository

The AbstractRepository class, @EntityRepository decorator, and getCustomRepository() method have been removed. These were deprecated in v0.3 in favor of Repository.extend().

Before:

@EntityRepository(User)
class UserRepository extends AbstractRepository<User> {
    findByName(name: string) {
        return this.repository.findOneBy({ name })
    }
}

// Usage
const userRepo = dataSource.getCustomRepository(UserRepository)

After:

const UserRepository = dataSource.getRepository(User).extend({
    findByName(name: string) {
        return this.findOneBy({ name })
    },
})

The following error classes were also removed: CustomRepositoryDoesNotHaveEntityError, CustomRepositoryCannotInheritRepositoryError, CustomRepositoryNotFoundError.

Deprecated lock modes

The pessimistic_partial_write and pessimistic_write_or_fail lock modes have been removed. Use pessimistic_write with the onLocked option instead:

// Before
.setLock("pessimistic_partial_write")

// After
.setLock("pessimistic_write")
.setOnLocked("skip_locked")

// Before
.setLock("pessimistic_write_or_fail")

// After
.setLock("pessimistic_write")
.setOnLocked("nowait")

The same applies to find options:

// Before
{ lock: { mode: "pessimistic_partial_write" } }

// After
{ lock: { mode: "pessimistic_write", onLocked: "skip_locked" } }

// Before
{ lock: { mode: "pessimistic_write_or_fail" } }

// After
{ lock: { mode: "pessimistic_write", onLocked: "nowait" } }

WhereExpression type alias

The deprecated WhereExpression type alias has been removed. Use WhereExpressionBuilder instead.

Repository.exist()

The deprecated Repository.exist() method has been removed. Use exists() instead — the behavior is identical:

// Before
const hasUsers = await userRepository.exist({ where: { isActive: true } })

// After
const hasUsers = await userRepository.exists({ where: { isActive: true } })

ColumnOptions.readonly

The deprecated readonly column option has been removed. Use the update option instead — note that it takes the opposite value:

// Before
@Column({ readonly: true })
authorName: string

// After
@Column({ update: false })
authorName: string

ColumnNumericOptions.unsigned

The deprecated unsigned property on ColumnNumericOptions (used with decimal/float column type overloads like @Column("decimal", { unsigned: true })) has been removed, as MySQL deprecated UNSIGNED for non-integer numeric types. The unsigned option on ColumnOptions for integer types is not affected and continues to work.

Migrations

getAllMigrations

The deprecated getAllMigrations() method has been removed. Use getMigrations() instead — the behavior is identical:

// Before
const migrations = await migrationExecutor.getAllMigrations()

// After
const migrations = migrationExecutor.getMigrations()

Configuration

Drop support for configuration via environment variables

The deprecated ConnectionOptionsEnvReader class and the ability to configure connections via TYPEORM_CONNECTION, TYPEORM_URL, and other TYPEORM_* environment variables has been removed. The ormconfig.env file format is also no longer supported. TypeORM no longer auto-loads .env files or depends on dotenv.

Use a TypeScript or JavaScript configuration file (ormconfig.ts, ormconfig.js) instead, referencing environment variables directly:

// ormconfig.ts
export default {
    type: process.env.DB_TYPE,
    url: process.env.DB_URL,
    // ...
}