django序列化器Serializers

Posted 2020-11-22 harrytree

1、创建一个app03, 在settings配置后， 在app03/models.py创建模型， 并同步数据库

from django.db import models

# Create your models here.


class Blog(models.Model):
    name = models.CharField(max_length=100)
    tagline = models.TextField()

    def __str__(self):
        return self.name

class Author(models.Model):
    name = models.CharField(max_length=200)
    email = models.EmailField()

    def __str__(self):
        return  self.name

class Entry(models.Model):
    blog = models.ForeignKey(Blog, on_delete=models.CASCADE)
    headline = models.CharField(max_length=255)
    body_text = models.TextField()
    # pub_date = models.DateField()
    # mod_date = models.DateField()
    # authors = models.ManyToManyField(Author)
    number_of_comments = models.IntegerField()
    number_of_pingbacks = models.IntegerField()
    # number_of_pingbacks2 = models.IntegerField(default= None)
    number_of_pingbacks2 = models.IntegerField(null=True)

    def __str__(self):
        return self.headline

2、在数据库中对应的author表里面添加数据

 

 3、在测试文件中， 查询author表的所有数据，并序列化

import  os
import  sys
from django.db import connection

if __name__ == "__main__":
    os.environ.setdefault(‘DJANGO_SETTINGS_MODULE‘, ‘untitled1.settings‘)
    import  django
    django.setup()
    from app03 import  models

    from django.core import serializers
    authors = models.Author.objects.all()
    print( authors)
    author_list = serializers.serialize("json", authors)
    print(author_list)

执行结果如下：

"D:Program Filespython3.6.7python.exe" D:/pythonWorkspace/untitled1/test_app03.py
<QuerySet [<Author: Joe>, <Author: lili>]>
[{"model": "app03.author", "pk": 1, "fields": {"name": "Joe", "email": "[e-mail]"}}, {"model": "app03.author", "pk": 2, "fields": {"name": "lili", "email": "[e-mail]"}}]

Process finished with exit code 0