Integer array items are converted to strings in the resulting sql statement

[stephantromer-pon]

Describe the bug

When saving a column that has the integer array type using TypeORM, the values are converted to strings in the resulting SQL statement.

TypeError: Cannot read properties of null (reading 'map')
at PostgresQueryRunner.query (src/driver/postgres/PostgresQueryRunner.ts:299:19)
    at InsertQueryBuilder.execute (src/query-builder/InsertQueryBuilder.ts:163:33)
    at SubjectExecutor.executeInsertOperations (src/persistence/SubjectExecutor.ts:434:42)
    at SubjectExecutor.execute (src/persistence/SubjectExecutor.ts:137:9)
    at EntityPersistExecutor.execute (src/persistence/EntityPersistExecutor.ts:182:21)

To Reproduce

Entity

@Entity('product')
export class ProductEntity {
  @Column('int', { array: true, nullable: true })
  channels: number[];
}

this.productRepository.save({
  channels: [501]
})

Expected: INSERT INTO "product"("channels") VALUES (ARRAY([501])) Actual INSERT INTO "product"("channels") VALUES (ARRAY(['501']))

pg-mem version

2.6.12