Typeorm Bug Report Reproduction Repo

This repository is a minimal, complete and verifiable example of a bug I stumbled upon when working with typeorm.

Link to reported issue: typeorm/typeorm#9565

How To Use This Repository

There are 2 branches:

• working

• not-working

The working branch contains a version of the project where the primary key columns of entities are typed as strings.

The not-working branch differs from the first branch only by changing the typing of the id columns to custom objects that serve as a box around a string value.

How To Run The Example

Assuming you are using yarn package manager, run

yarn install

to install all necessary dependencies and then run

yarn start

Depending on what branch you're running the script, you should see in your console either a log with a stringified entity that was inserted during the program execution or an TypeError like the one below:

TypeError: Cannot read properties of undefined (reading 'value')
    at Object.to (/home/xxx/typeorm-example/src/entities/post.entity.ts:31:19)
    at Function.transformTo (/home/xxx/typeorm-example/src/util/ApplyValueTransformers.ts:28:28)
    at SqliteDriver.preparePersistentValue (/home/xxx/typeorm-example/src/driver/sqlite-abstract/AbstractSqliteDriver.ts:319:44)
    at /home/xxx/typeorm-example/src/query-builder/InsertQueryBuilder.ts:717:56
    at Array.forEach (<anonymous>)
    at /home/xxx/typeorm-example/src/query-builder/InsertQueryBuilder.ts:688:25
    at Array.forEach (<anonymous>)
    at InsertQueryBuilder.createValuesExpression (/home/xxx/typeorm-example/src/query-builder/InsertQueryBuilder.ts:687:23)
    at InsertQueryBuilder.createInsertExpression (/home/xxx/typeorm-example/src/query-builder/InsertQueryBuilder.ts:406:39)
    at InsertQueryBuilder.getQuery (/home/xxx/typeorm-example/src/query-builder/InsertQueryBuilder.ts:39:21)