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@@ -308,6 +308,12 @@ By default, all the model fields on the class will be mapped to corresponding se
Any relationships such as foreign keys on the model will be mapped to `PrimaryKeyRelatedField`. Other models fields will be mapped to a corresponding serializer field.
+---
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+**Note**: When validation is applied to a `ModelSerializer`, both the serializer fields, and their corresponding model fields must correctly validate. If you have optional fields on your model, make sure to correctly set `blank=True` on the model field, as well as setting `required=False` on the serializer field.
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+---
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## Specifying which fields should be included
If you only want a subset of the default fields to be used in a model serializer, you can do so using `fields` or `exclude` options, just as you would with a `ModelForm`.