Django的quarySet

models.py 代码

 1 from django.db import models
 2 
 3 # Create your models here.
 4 
 5 
 6 class Author(models.Model):
 7     name = models.CharField(max_length=30)
 8     qq = models.CharField(max_length=20)
 9     add = models.CharField(max_length=50)
10     email = models.EmailField()
11 
12     def __str__(self):
13         return self.name
14 
15 
16 class Article(models.Model):
17     title = models.CharField(max_length=50)
18     author = models.ForeignKey(Author, on_delete=models.CASCADE)
19     content = models.TextField()
20     score = models.IntegerField()
21     tags = models.ManyToManyField('Tag')
22 
23     def __str__(self):
24         return self.title
25 
26 
27 class Tag(models.Model):
28     name = models.CharField(max_length=50)
29 
30     def __str__(self):
31         return self.name

initdb.py代码

 1 import random
 2 from my_query.wsgi import *
 3 from blog.models import Author, Article, Tag
 4 import os,django
 5 
 6 os.environ.setdefault("DJANGO_SETTINGS_MODULE", "my_query.settings")
 7 django.setup()
 8 
 9 author_name_list = ['dengyexun', 'lina', 'zhangming']
10 article_title_list = ['Django book', 'Java book', 'C# book']
11 
12 
13 def create_author():
14     for author_name in author_name_list:
15         author, created = Author.objects.get_or_create(name=author_name)
16         author.qq = ''.join(
17             str(random.choice(range(10))) for i in range(9)
18         )
19         author.add = 'addr_%s' % (random.randrange(1, 3))
20         author.email = '%s@qq.com' % (author.add)
21         author.save()
22 
23 
24 def create_article_tag():
25     for article_title in article_title_list:
26         tag_name = article_title.split(' ')[0]
27         tag, created = Tag.objects.get_or_create(name=tag_name)
28         random_author = random.choice(Author.objects.all())
29 
30         for i in range(1, 21):
31             title = '%s_%s' % (article_title, i)
32             article, created = Article.objects.get_or_create(
33                 title=title, defaults={
34                     'author': random_author,
35                     'content': '%s content' % title,
36                     'score': random.randrange(70, 90),
37                 }
38             )
39             article.tags.add(tag)
40 
41 
42 def main():
43     create_author()
44     create_article_tag()
45 
46 
47 if __name__ == '__main__':
48     main()
49     print('Done')

参考：

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