字段类型
常用字段类型：
| 字段 | 字段构造方式 |
|---|---|
| BooleanField | BooleanField() |
| NullBooleanField | NullBooleanField() |
| CharField | CharField(max_length=None, min_length=None, allow_blank=False, trim_whitespace=True) |
| EmailField | EmailField(max_length=None, min_length=None, allow_blank=False) |
| RegexField | RegexField(regex, max_length=None, min_length=None, allow_blank=False) |
| SlugField | SlugField(maxlength=50, min_length=None, allow_blank=False) 正则字段，验证正则模式 [a-zA-Z0-9-]+ |
| URLField | URLField(max_length=200, min_length=None, allow_blank=False) |
| UUIDField | UUIDField(format='hex_verbose') format: 1)'hex_verbose'如"5ce0e9a5-5ffa-654b-cee0-1238041fb31a" 2）'hex'如"5ce0e9a55ffa654bcee01238041fb31a" 3）'int'- 如:"123456789012312313134124512351145145114" 4）'urn'如:"urn:uuid:5ce0e9a5-5ffa-654b-cee0-1238041fb31a" |
| IPAddressField | IPAddressField(protocol='both', unpack_ipv4=False, **options) |
| IntegerField | IntegerField(max_value=None, min_value=None) |
| FloatField | FloatField(max_value=None, min_value=None) |
| DecimalField | DecimalField(max_digits, decimal_places, coerce_to_string=None, max_value=None, min_value=None) max_digits: 最多位数 decimal_palces: 小数点位置 |
| DateTimeField | DateTimeField(format=api_settings.DATETIME_FORMAT, input_formats=None) |
| DateField | DateField(format=api_settings.DATE_FORMAT, input_formats=None) |
| TimeField | TimeField(format=api_settings.TIME_FORMAT, input_formats=None) |
| DurationField | DurationField() |
| ChoiceField | ChoiceField(choices) choices与Django的用法相同 |
| MultipleChoiceField | MultipleChoiceField(choices) |
| FileField | FileField(max_length=None, allow_empty_file=False, use_url=UPLOADED_FILES_USE_URL) |
| ImageField | ImageField(max_length=None, allow_empty_file=False, use_url=UPLOADED_FILES_USE_URL) |
| ListField | ListField(child=, min_length=None, max_length=None) |
| DictField | DictField(child=) |
在序列化器中，定义的readcount为IntegerField类型
class BookInfoSerializer(serializers.Serializer):
"""图书数据序列化器"""
id = serializers.IntegerField(label='ID')
name = serializers.CharField(label='名称')
pub_date = serializers.DateField(label='发布日期')
readcount = serializers.IntegerField(label='阅读量')
commentcount = serializers.IntegerField(label='评论量')
如果我们传递一个与定义类型不一致的会怎么样呢？
>>> from book.serializers import BookInfoSerializer
>>>
>>> data = {
... 'id':100,
... 'name':'Python高级',
... 'pub_date':'2020',
... 'readcount':100,
... 'commentcount':200
... }
>>>
>>> serializer = BookInfoSerializer(data=data)
>>>
>>> serializer.is_valid()
False
>>>
>>> serializer.errors
{'pub_date': [ErrorDetail(string='Date has wrong format. Use one of these formats instead: YYYY-MM-DD.', code='invalid')]}
