Polymorphic field is not present

[Gobot1234]

Code The code causing the error.

https://github.com/iforge-uos/ignis/blob/feature/protein-filled-dinner/apps/anvil/src/training/training.service.ts#L39

  async getTraining(id: string, editing?: boolean): Promise<training.Training> {
    const x = e
      .assert_exists(
        e.select(e.training.Training, () => ({
          ...(editing
            ? {
                ...e.training.Training["*"],
                sections: TrainingSection,
              }
            : {...}),
          enabled: true,
          rep: { id: true, name: true, description: true },
          filter_single: { id },
        })),
      );
    console.log(x.toEdgeQL());
  }

refs: https://discord.com/channels/841451783728529451/1265373494561083583

Schema

https://github.com/iforge-uos/ignis/tree/feature/protein-filled-dinner/apps/anvil/dbschema/training.esdl

Generated EdgeQL

None, error generated

Error or desired behavior

anvil:dev:     'Error: Field "index" does not exist in training::Question | training::TrainingPage\n' +
anvil:dev:       '    at shapeToEdgeQL (/Users/James/Programming/ignis/apps/anvil/dbschema/edgeql-js/toEdgeQL.ts:1338:15)\n' +
anvil:dev:       '    at renderEdgeQL (/Users/James/Programming/ignis/apps/anvil/dbschema/edgeql-js/toEdgeQL.ts:968:11)\n' +
anvil:dev:       '    at shapeToEdgeQL (/Users/James/Programming/ignis/apps/anvil/dbschema/edgeql-js/toEdgeQL.ts:1375:26)\n' +
anvil:dev:       '    at Array.map (<anonymous>)\n' +
anvil:dev:       '    at renderEdgeQL (/Users/James/Programming/ignis/apps/anvil/dbschema/edgeql-js/toEdgeQL.ts:1148:32)\n' +
anvil:dev:       '    at Proxy.$toEdgeQL (/Users/James/Programming/ignis/apps/anvil/dbschema/edgeql-js/toEdgeQL.ts:319:16)\n' +
anvil:dev:       '    at TrainingService.getTraining (/Users/James/Programming/ignis/apps/anvil/src/training/training.service.ts:56:8)\n' +
anvil:dev:       '    at TrainingController.getTraining (/Users/James/Programming/ignis/apps/anvil/src/training/training.controller.ts:41:33)'
anvil:dev:   ]

Versions (please complete the following information):

• OS:
• EdgeDB version (e.g. 2.0): 5.4+06b93a6
• EdgeDB CLI version (e.g. 2.0): EdgeDB CLI 5.2.0-dev.1166+b5e9df3
• edgedb-js version (e.g. 0.20.10;): 1.5.12
• @edgedb/generate version (e.g. 0.0.7;): v0.5.3