I got the error
[cause]: Error: Unable to open file: "D:\IntelliJ IDEA***\TypeORM_DataSource.ts". Cannot use import statement outside a module
error when tried to run the seeders by
typeorm-seeding \
--dataSource 01-Source/Implementation/Elements/DataBase/TypeORM_DataSource.ts \
seed 01-Source/Implementation/Elements/DataBase/Seeders/*.ts
using @jorgebodega/typeorm-seeding.
Well, it is the frequent error with ts-node, but each time the cause thus the solution are different. In my case, the adding of "type": "module" to package.json does not solve the problem.
By the way, the TypeORM migrations works fine:
typeorm-ts-node-esm migration:generate ./01-Source/Implementation/Elements/DataBase/Migrations/Initialization -d ./01-Source/Implementation/Elements/DataBase/TypeORM_DataSource.ts
Train of thought about cause
In the documentation, the example with .ts has been gave:
typeorm-seeding seed -d path/to/datasource src/seeders/*.ts
Thus, typeorm-seeding must have the build-in TypeScript support. Most likely, it is using the ts-node.
The usage of export/imports keywords is completely basic scenario for the TypeScript.
Into what it will be transpiled - the different question.
Should not the typeorm-seeding care about transpiling of the input TypeScript to appropriate types of modules?
Appendix
TypeScript configuration
Theoretically, the ts-node settings should solve the issues with modules type.
{
"compilerOptions": {
"target": "ESNext",
"module": "ESNext",
"moduleResolution": "node",
"allowSyntheticDefaultImports": true,
"esModuleInterop": true,
"strict": true,
"noImplicitReturns": true,
"noUnusedLocals": true,
"noUnusedParameters": true,
"experimentalDecorators": true,
"emitDecoratorMetadata": true,
"baseUrl": "./01-Source",
"paths": {
"@CommonSolution/*": [ "./CommonSolution/*"],
/* ... */
}
},
"ts-node": {
"compilerOptions": {
"module": "CommonJS"
},
"require": [
"tsconfig-paths/register"
]
}
}
docker-compose.yaml
version: "3.5"
services:
Database:
image: postgres
container_name: Example-Local-Database
ports:
- "${DATABASE_PORT}:${DATABASE_PORT}"
environment:
- "POSTGRES_PASSWORD=${DATABASE_PASSWORD}"
volumes:
- DatabaseData:/var/lib/postgresql/data
# ...
volumes:
DatabaseData:
name: Example-Local-DatabaseData
driver: local
