django Serializer序列化 django Serializer序列化使用方法详解

class BookInfo(models.Model):
  btitle = models.CharField(max_length=20, verbose_name='名称')
  bpub_date = models.DateField(verbose_name='发布日期', null=True)
  bread = models.IntegerField(default=0, verbose_name='阅读量')
  bcomment = models.IntegerField(default=0, verbose_name='评论量')
  image = models.ImageField(upload_to='booktest', verbose_name='图片', null=True)

class BookInfoSerializer(serializers.Serializer):
  """图书数据序列化器"""
  id = serializers.IntegerField(label='ID', read_only=True)
  btitle = serializers.CharField(label='名称', max_length=20)
  bpub_date = serializers.DateField(label='发布日期', required=False)
  bread = serializers.IntegerField(label='阅读量', required=False)
  bcomment = serializers.IntegerField(label='评论量', required=False)
  image = serializers.ImageField(label='图片', required=False)

Serializer(instance=None, data=empty, **kwarg)

serializer = AccountSerializer(account, context={'request': request})

python manage.py shell

from booktest.models import BookInfo
book = BookInfo.objects.get(id=2)

from booktest.serializers import BookInfoSerializer
serializer = BookInfoSerializer(book)

serializer.data
# {'id': 2, 'btitle': '天龙八部', 'bpub_date': '1986-07-24', 'bread': 36, 'bcomment': 40, 'image': None}

book_qs = BookInfo.objects.all()
serializer = BookInfoSerializer(book_qs, many=True)
serializer.data
# [OrderedDict([('id', 2), ('btitle', '天龙八部'), ('bpub_date', '1986-07-24'), ('bread', 36), ('bcomment', 40), ('image', N]), OrderedDict([('id', 3), ('btitle', '笑傲江湖'), ('bpub_date', '1995-12-24'), ('bread', 20), ('bcomment', 80), ('image'ne)]), OrderedDict([('id', 4), ('btitle', '雪山飞狐'), ('bpub_date', '1987-11-11'), ('bread', 58), ('bcomment', 24), ('ima None)]), OrderedDict([('id', 5), ('btitle', '西游记'), ('bpub_date', '1988-01-01'), ('bread', 10), ('bcomment', 10), ('im', 'booktest/xiyouji.png')])]

class HeroInfoSerializer(serializers.Serializer):
  """英雄数据序列化器"""
  GENDER_CHOICES = (
    (0, 'male'),
    (1, 'female')
  )
  id = serializers.IntegerField(label='ID', read_only=True)
  hname = serializers.CharField(label='名字', max_length=20)
  hgender = serializers.ChoiceField(choices=GENDER_CHOICES, label='性别', required=False)
  hcomment = serializers.CharField(label='描述信息', max_length=200, required=False, allow_null=True)

hbook = serializers.PrimaryKeyRelatedField(label='图书', read_only=True)
或
hbook = serializers.PrimaryKeyRelatedField(label='图书', queryset=BookInfo.objects.all())

from booktest.serializers import HeroInfoSerializer
from booktest.models import HeroInfo
hero = HeroInfo.objects.get(id=6)
serializer = HeroInfoSerializer(hero)
serializer.data
# {'id': 6, 'hname': '乔峰', 'hgender': 1, 'hcomment': '降龙十八掌', 'hbook': 2}

hbook = serializers.StringRelatedField(label='图书')

hbook = serializers.HyperlinkedRelatedField(label='图书', read_only=True, view_name='books-detail')

hbook = serializers.SlugRelatedField(label='图书', read_only=True, slug_field='bpub_date')

hbook = BookInfoSerializer()

class BookRelateField(serializers.RelatedField):
  """自定义用于处理图书的字段"""
  def to_representation(self, value):
    return 'Book: %d %s' % (value.id, value.btitle)

hbook = BookRelateField(read_only=True)

class BookInfoSerializer(serializers.Serializer):
  """图书数据序列化器"""
  id = serializers.IntegerField(label='ID', read_only=True)
  btitle = serializers.CharField(label='名称', max_length=20)
  bpub_date = serializers.DateField(label='发布日期', required=False)
  bread = serializers.IntegerField(label='阅读量', required=False)
  bcomment = serializers.IntegerField(label='评论量', required=False)
  image = serializers.ImageField(label='图片', required=False)
  heroinfo_set = serializers.PrimaryKeyRelatedField(read_only=True, many=True) # 新增

from booktest.serializers import BookInfoSerializer
from booktest.models import BookInfo
book = BookInfo.objects.get(id=2)
serializer = BookInfoSerializer(book)
serializer.data
# {'id': 2, 'btitle': '天龙八部', 'bpub_date': '1986-07-24', 'bread': 36, 'bcomment': 40, 'image': Non