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  • Django的自关联

    Django的自关联

    多对多关联

    models.py
    #### 自关联
    class User(models.Model):
    	name = models.CharField(max_length=32)
    	gender_list = [
    		(1,'男'),
    		(2,'女')
    		]
    gender = models.IntegerField(choices=gender_list, default=1)
    m = models.ManyToManyField('User')  #关联自己
    
    
    
    views.py:
    #### 查询和zekai约会的姑娘
    res = models.User.objects.filter(name='zekai', gender=1).first()
    #print(res) ### obj
    objs = res.m.all()
    '''
    1. select * from app01_user_m where  from_user_id = 1  ### to_user_id=[3,4]
    2. select * from app01_user where id in (3,4)
    '''
    for obj in objs:
    	print(obj.name)
    
    #### 查询和cuihua约会的男生
    res = models.User.objects.filter(name='cuihua', gender=2).first()
    objs = res.user_set.all()
    '''
    1. select * from app01_user_m where  to_user_id = 3  ### from_user_id=[1,2]
    2. select * from app01_user where id in (1,2) 
    '''
    for obj in objs:
    	print(obj.name)
    

    一对多

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  • 原文地址:https://www.cnblogs.com/bladecheng/p/11372261.html
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