django-python数据库表操作实例

Posted 2021-04-06 1team8

关键词

诗歌网站、一对多、表操作基础练习

poem/models.py

from django.db import models
# Create your models here.class PoetModel(models.Model):    SEX = ((1,'男'),(2,'女')    DYNASTY = ((1,'唐'),(2,'宋'),(3,'元')) name = models.CharField(max_length=20) sex = models.IntegerField(choices=SEX, null=False) dynasty = models.IntegerField(choices=DYNASTY,null=False)
 class Meta: db_table = 't_poet' def __str__(self):  return self.name
class PoemModel(models.Model): title = models.CharField(max_length=100) content = models.CharField(max_length=1000)    style = models.CharField(max_length=1000) author = models.ForeignKey(Poet, on_delete=models.CASCADE,null=True) def __str__(self):  return self.title  class Meta: db_table = 't_poem'

实例要求

1.添加诗歌

①李白，将进酒，'君不见黄河之水天上来，奔流到海不复回。'，[劝酒,浪漫]

②李白，蜀道难，'蜀道之难，难于上青天！'，[浪漫]

③杜甫，登高，'无边落木萧萧下，不尽长江滚滚来。'，[多愁]

④杜甫，望岳，'会当凌绝顶，一览众山小。'，[浪漫]

⑤李清照，寻寻觅觅，'寻寻觅觅，冷冷清清，凄凄惨惨戚戚。'，[多愁]

2.根据名称查询诗歌，并查出作者

3.查询某作者的所有诗歌

4.使用两种方式添加诗歌

李白，赠汪伦，'桃花潭水深千尺，不及汪伦送我情。'，[劝酒]

具体操作

#默认诗人已存在PoetModel中#1name = PoetModel.objects.get(name="李白")PoemModel.objects.create(author=name,title="将进酒",content="君不见黄河之水天上来，奔流到海不复回。",style="劝酒,浪漫")PoemModel.objects.create(author=name,title="蜀道难",content="蜀道难，'蜀道之难，难于上青天！",style="浪漫")name = PoetModel.objects.get(name="杜甫")PoemModel.objects.create(author=name,title="登高",content="无边落木萧萧下，不尽长江滚滚来。",style="多愁")PoemModel.objects.create(author=name,title="望月",content="会当凌绝顶，一览众山小",style="浪漫")name = PoetModel.objects.get(name="李清照")Poemmodel.objects.create(author=name,title="寻寻觅觅",content="寻寻觅觅，冷冷清清，凄凄惨惨戚戚。",style="多愁")
#2p = PoemModel.objects.get(title="诗歌名")p.author()
#3name = PoetModel.objects.get(name="作者名")poem.objects.filter(author=name)
#4name = PoetModel.objects.get(name="李白")poem.objects.create(author=name,title="赠汪伦",content="桃花潭水深千尺，不及汪伦送我情。",style="劝酒")p = poem(author=name,title="赠汪伦",content="桃花潭水深千尺，不及汪伦送我情。",style="劝酒")