The deprecated/alias ConnectionOptions type is no longer exported from typeorm

[feather-jmalone]

Issue Description

Expected Behavior

The ConnectionOptions type is @deprecated as of v0.3.0 (2022-03-17). The Connection type was also marked as @deprecated in this same version, but both types still have 'alias' types for backwards compatibility's sake. This is accomplished by declaring that ConnectionOptions extends DataSourceOptions and Connection extends DataSource, respectively:

While it's great that the intent was to be backwards compatible, the problem is that the ConnectionOptions extends DataSourceOptions class is broken if you try to import it from 'typeorm', because it's not exported in index.d.ts:

Actual Behavior

While the Connection->DataSource alias is exported from index.d.ts, the ConnectionOptions->DataSourceOptions alias is not.

The newly renamed types can be imported directly from their class files, if you control the imports at that level. But if you're using NestJS for example (or anything with a TypeORM dependency that hasn't been updated to use the names DataSource or DataSourceOptions yet), the compiler will complain that typeorm has no exported type called ConnectionOptions.

The Fix

You can temporarily clear this error by adding the following line to ./node_modules/typeorm/index.d.ts:

export { ConnectionOptions } from "./connection/ConnectionOptions";

But of course, that only solves the problem locally, not for CI/CD or other environments where npm install might need to run again.

[Plus I'm not sure that will completely solve the problem -- the Changelog makes it sound like DataSource and DataSourceOptions are simply just new names for Connection and ConnectionOptions, but is that definitely true? Does the behavior differ at all?]

Steps to Reproduce

Try to initialize a connection using ConnectionOptions with a 3rd party library like NestJS, or any other package that has not updated its TypeORM connection code since the release of v0.3.0 (2022-03-17)

My Environment

• OSX 11.5.2
• Node 14.19.1
• TypeScript 4.6.2
• TypeORM 0.3.4

Additional Context

N/A

Relevant Database Driver(s)

DB Type	Reproducible
aurora-mysql	no
aurora-postgres	no
better-sqlite3	no
cockroachdb	no
cordova	no
expo	no
mongodb	no
mysql	yes
nativescript	no
oracle	no
postgres	no
react-native	no
sap	no
sqlite	no
sqlite-abstract	no
sqljs	no
sqlserver	no

NOTE: The above simply means that mysql is the only driver I tried, not that it was the only that had this issue`

Are you willing to resolve this issue by submitting a Pull Request?

• ✖️ Yes, I have the time, and I know how to start.
• ✅ Yes, I have the time, but I don't know how to start. I would need guidance.
• ✖️ No, I don’t have the time, but I can support (using donations) development.
• ✖️ No, I don’t have the time and I’m okay to wait for the community / maintainers to resolve this issue.

[X-neuron]

same problem ：

node_modules/@nestjs/typeorm/dist/common/typeorm.decorators.d.ts:2:22 - error TS2724: '"typeorm"' has no exported member named 'ConnectionOptions'. Did you mean 'CollectionOptions'?

2 import { Connection, ConnectionOptions } from 'typeorm';
                       ~~~~~~~~~~~~~~~~~

node_modules/@nestjs/typeorm/dist/common/typeorm.utils.d.ts:3:22 - error TS2724: '"typeorm"' has no exported member named 'ConnectionOptions'. Did you mean 'CollectionOptions'?

3 import { Connection, ConnectionOptions } from 'typeorm';
                       ~~~~~~~~~~~~~~~~~

node_modules/@nestjs/typeorm/dist/interfaces/typeorm-options.interface.d.ts:2:22 - error TS2724: '"typeorm"' has no exported member named 'ConnectionOptions'. Did you mean 'CollectionOptions'?

2 import { Connection, ConnectionOptions } from 'typeorm';
                       ~~~~~~~~~~~~~~~~~

node_modules/@nestjs/typeorm/dist/typeorm.module.d.ts:2:22 - error TS2724: '"typeorm"' has no exported member named 'ConnectionOptions'. Did you mean 'CollectionOptions'?

2 import { Connection, ConnectionOptions } from 'typeorm';

[pleerock]

Thanks for the report. Please feel free to PR (just add missing export to index.ts).

[eduardoconti]

I'm having the same problem with postgres

[Zeshan-Shakil]

i have same issue with mysql n mariadb

[santicortes123]

tengo otro problema algunos funcionamientos con el Connection, getConnection, createConnection, ConnectionOptions,, no tiene compatibilidad con la version SDK Expo 48.0, hay otra forma para mantener la libreria TypeOrm?