Django的quarySet

models.py 代码

from django.db import models

# Create your models here.


class Author(models.Model):
    name = models.CharField(max_length=30)
    qq = models.CharField(max_length=20)
    add = models.CharField(max_length=50)
    email = models.EmailField()

    def __str__(self):
        return self.name


class Article(models.Model):
    title = models.CharField(max_length=50)
    author = models.ForeignKey(Author, on_delete=models.CASCADE)
    content = models.TextField()
    score = models.IntegerField()
    tags = models.ManyToManyField('Tag')

    def __str__(self):
        return self.title


class Tag(models.Model):
    name = models.CharField(max_length=50)

    def __str__(self):
        return self.name

initdb.py代码

import random
from my_query.wsgi import *
from blog.models import Author, Article, Tag
import os,django

os.environ.setdefault("DJANGO_SETTINGS_MODULE", "my_query.settings")
django.setup()

author_name_list = ['dengyexun', 'lina', 'zhangming']
article_title_list = ['Django book', 'Java book', 'C# book']


def create_author():
    for author_name in author_name_list:
        author, created = Author.objects.get_or_create(name=author_name)
        author.qq = ''.join(
            str(random.choice(range(10))) for i in range(9)
        )
        author.add = 'addr_%s' % (random.randrange(1, 3))
        author.email = '%s@qq.com' % (author.add)
        author.save()


def create_article_tag():
    for article_title in article_title_list:
        tag_name = article_title.split(' ')[0]
        tag, created = Tag.objects.get_or_create(name=tag_name)
        random_author = random.choice(Author.objects.all())

        for i in range(1, 21):
            title = '%s_%s' % (article_title, i)
            article, created = Article.objects.get_or_create(
                title=title, defaults={
                    'author': random_author,
                    'content': '%s content' % title,
                    'score': random.randrange(70, 90),
                }
            )
            article.tags.add(tag)


def main():
    create_author()
    create_article_tag()


if __name__ == '__main__':
    main()
    print('Done')

参考：

https://code.ziqiangxuetang.com/django/django-queryset-advance.html