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CharField - add allow_null argument

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This commit is contained in:
Yuri Prezument 2014-01-05 15:58:46 +02:00
parent e88e3c6ae1
commit 6e622d644c
2 changed files with 7 additions and 5 deletions
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7
docs/api-guide/fields.md
View File

@ -157,23 +157,24 @@ Corresponds to `django.db.models.fields.BooleanField`.
## CharField
A text representation, optionally validates the text to be shorter than `max_length` and longer than `min_length`.
If `allow_none` is `False` (default), `None` values will be converted to an empty string.
Corresponds to `django.db.models.fields.CharField`
or `django.db.models.fields.TextField`.
**Signature:** `CharField(max_length=None, min_length=None)`
**Signature:** `CharField(max_length=None, min_length=None, allow_none=False)`
## URLField
Corresponds to `django.db.models.fields.URLField`. Uses Django's `django.core.validators.URLValidator` for validation.
**Signature:** `CharField(max_length=200, min_length=None)`
**Signature:** `CharField(max_length=200, min_length=None, allow_none=False)`
## SlugField
Corresponds to `django.db.models.fields.SlugField`.
**Signature:** `CharField(max_length=50, min_length=None)`
**Signature:** `CharField(max_length=50, min_length=None, allow_none=False)`
## ChoiceField

5
rest_framework/fields.py
View File

@ -443,8 +443,9 @@ class CharField(WritableField):
type_label = 'string'
form_field_class = forms.CharField
def __init__(self, max_length=None, min_length=None, *args, **kwargs):
def __init__(self, max_length=None, min_length=None, allow_none=False, *args, **kwargs):
self.max_length, self.min_length = max_length, min_length
self.allow_none = allow_none
super(CharField, self).__init__(*args, **kwargs)
if min_length is not None:
self.validators.append(validators.MinLengthValidator(min_length))
@ -452,7 +453,7 @@ class CharField(WritableField):
self.validators.append(validators.MaxLengthValidator(max_length))
def from_native(self, value):
if value is None:
if value is None and not self.allow_none:
return ''
if isinstance(value, six.string_types):
return value