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Update documentation regarding arguments of ValidationError (#8807)

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The documentation used to state that the `detail` argument was
mandatory, but in fact it currently is not.
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totycro 2023-01-09 19:53:49 +01:00 committed by GitHub
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docs/api-guide/exceptions.md
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@ -217,11 +217,10 @@ By default this exception results in a response with the HTTP status code "429 T
## ValidationError
**Signature:** `ValidationError(detail, code=None)`
**Signature:** `ValidationError(detail=None, code=None)`
The `ValidationError` exception is slightly different from the other `APIException` classes:
* The `detail` argument is mandatory, not optional.
* The `detail` argument may be a list or dictionary of error details, and may also be a nested data structure. By using a dictionary, you can specify field-level errors while performing object-level validation in the `validate()` method of a serializer. For example. `raise serializers.ValidationError({'name': 'Please enter a valid name.'})`
* By convention you should import the serializers module and use a fully qualified `ValidationError` style, in order to differentiate it from Django's built-in validation error. For example. `raise serializers.ValidationError('This field must be an integer value.')`