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Add tip about using values() to exclude required fields

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johnthagen
2021-10-06 13:44:12 -04:00
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docs/queries/select-columns.md
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@ -109,6 +109,9 @@ assert all_cars[0].manufacturer.founded == 1937
Mandatory fields cannot be excluded as it will raise `ValidationError`, to Mandatory fields cannot be excluded as it will raise `ValidationError`, to
exclude a field it has to be nullable. exclude a field it has to be nullable.
The `values()` method can be used to exclude mandatory fields, though data will
be returned as a `dict`.
You cannot exclude mandatory model columns - `manufacturer__name` in this example. You cannot exclude mandatory model columns - `manufacturer__name` in this example.
```python ```python
@ -274,6 +277,9 @@ await Car.objects.select_related('manufacturer').exclude_fields([{'company': {'n
Mandatory fields cannot be excluded as it will raise `ValidationError`, to Mandatory fields cannot be excluded as it will raise `ValidationError`, to
exclude a field it has to be nullable. exclude a field it has to be nullable.
The `values()` method can be used to exclude mandatory fields, though data will
be returned as a `dict`.
!!!tip !!!tip
Pk column cannot be excluded - it's always auto added even if explicitly Pk column cannot be excluded - it's always auto added even if explicitly
excluded. excluded.