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Change allow_none to allow_null

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José Padilla 2014-12-01 11:26:50 -04:00
parent 555c450497
commit 080fa4f5f8
1 changed files with 4 additions and 4 deletions
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docs/topics/3.0-announcement.md
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@ -557,22 +557,22 @@ We now use the following:
* `Field` is the base class for all fields. It does not include any default implementation for either serializing or deserializing data. * `Field` is the base class for all fields. It does not include any default implementation for either serializing or deserializing data.
* `ReadOnlyField` is a concrete implementation for read-only fields that simply returns the attribute value without modification. * `ReadOnlyField` is a concrete implementation for read-only fields that simply returns the attribute value without modification.
#### The `required`, `allow_none`, `allow_blank` and `default` arguments. #### The `required`, `allow_null`, `allow_blank` and `default` arguments.
REST framework now has more explicit and clear control over validating empty values for fields. REST framework now has more explicit and clear control over validating empty values for fields.
Previously the meaning of the `required=False` keyword argument was underspecified. In practice its use meant that a field could either be not included in the input, or it could be included, but be `None` or the empty string. Previously the meaning of the `required=False` keyword argument was underspecified. In practice its use meant that a field could either be not included in the input, or it could be included, but be `None` or the empty string.
We now have a better separation, with separate `required`, `allow_none` and `allow_blank` arguments. We now have a better separation, with separate `required`, `allow_null` and `allow_blank` arguments.
The following set of arguments are used to control validation of empty values: The following set of arguments are used to control validation of empty values:
* `required=False`: The value does not need to be present in the input, and will not be passed to `.create()` or `.update()` if it is not seen. * `required=False`: The value does not need to be present in the input, and will not be passed to `.create()` or `.update()` if it is not seen.
* `default=<value>`: The value does not need to be present in the input, and a default value will be passed to `.create()` or `.update()` if it is not seen. * `default=<value>`: The value does not need to be present in the input, and a default value will be passed to `.create()` or `.update()` if it is not seen.
* `allow_none=True`: `None` is a valid input. * `allow_null=True`: `None` is a valid input.
* `allow_blank=True`: `''` is valid input. For `CharField` and subclasses only. * `allow_blank=True`: `''` is valid input. For `CharField` and subclasses only.
Typically you'll want to use `required=False` if the corresponding model field has a default value, and additionally set either `allow_none=True` or `allow_blank=True` if required. Typically you'll want to use `required=False` if the corresponding model field has a default value, and additionally set either `allow_null=True` or `allow_blank=True` if required.
The `default` argument is also available and always implies that the field is not required to be in the input. It is unnecessary to use the `required` argument when a default is specified, and doing so will result in an error. The `default` argument is also available and always implies that the field is not required to be in the input. It is unnecessary to use the `required` argument when a default is specified, and doing so will result in an error.