i try to

dataSource.getRepository(CollectionEntity).find({
      relations: {
        workspaces: true
      },
      select: {
        id: true,
        name: true,
        workspaces: {
          id: true,
          name: true
        }
      }
    })

but the response contains always the whole workspace relation with all fields and not only id, name
i would expect

[
    {
        id: 1,
        name: "col1",
        workspaces: [
            {
                id: 1,
                name: "ws1"
            }
        ] 
    } 
]