Django-manage.py shell命令

1、进入shell模式

python3 manage.py shell

 2、基本数据访问

from loginApp.models import Event,Guest   #导入loginAPP应用下的models.py中的event和guest表

Event.objects.all()  #获取event表中的所有对象

Guest.objects.all()

 2、插入数据

>>> e1 = Event(id=2,name='aa的pro发布会',limit=10,status=True,address='山东泰山',start_time=datetime(2021,2,15,0,0,0))
>>> e1.save()

/Users/bjhl/stone-web/lib/python3.6/site-packages/django/db/models/fields/__init__.py:1447: RuntimeWarning: DateTimeField Event.start_time received a naive datetime (2021-02-15 00:00:00) while time zone support is active.
  RuntimeWarning)    UTC有兴趣可查，可以在USE_TZ = False 关闭

>>>  quit()
再次进入shell模式查看，才能看到成功报错效果

　　

>>> from datetime import datetime
>>> Event.objects.create(id=3,name='bb的pro发布会',limit=30,status=True,address='Asia',start_time=datetime(2021,2,15,0,0,59))   #创建并保存

/Users/bjhl/stone-web/lib/python3.6/site-packages/django/db/models/fields/__init__.py:1447: RuntimeWarning: DateTimeField Event.start_time received a naive datetime (2021-02-15 00:00:59) while time zone support is active.
  RuntimeWarning)
<Event: bb的pro发布会>

>>> Guest.objects.create(realname="juju",phone=16812341234,email='andy@mail.com',sign=False,event_id=3)
<Guest: juju>
>>>

3、查询数据(table.objects.get精确匹配)

>>> Event.objects.get(name="aa的pro发布会")
<Event: aa的pro发布会>
>>> e1=Event.objects.get(name="aa的pro发布会")
>>> e1.email
Traceback (most recent call last):
  File "<console>", line 1, in <module>
AttributeError: 'Event' object has no attribute 'email'
>>> e1.address
'山东泰山'
>>> e1.start_time
datetime.datetime(2021, 2, 15, 0, 0, tzinfo=<UTC>)
>>> e1.limit
10

4、　模糊匹配

>>> Guest.objects.select_for_update().filter(phone='15088132356').update(realname='hjahah')
1
>>> Guest.objects.select_for_update().filter(phone='15088132356')
<QuerySet [<Guest: hjahah>]>

　　

>>> e2 =Event.objects.filter(name__contains="发布会")   #name__contains是双下划线，匹配到就返回一个对象列表。匹配不到，直接返回[]

>>> e2 <QuerySet [<Event: 菲菲的新品发布会>, <Event: aa的pro发布会>, <Event: bb的pro发布会>]> >>>

5、删除数据

>>> Event.objects.get(name="bb的pro发布会")
<Event: bb的pro发布会>
>>> e3 =Event.objects.get(name="bb的pro发布会")
>>> e3
<Event: bb的pro发布会>
>>> e3.delete()
(2, {'loginApp.Guest': 1, 'loginApp.Event': 1})
>>> e3 =Event.objects.get(name="bb的pro发布会")
Traceback (most recent call last):
  File "<console>", line 1, in <module>
  File "/Users/bjhl/stone-web/lib/python3.6/site-packages/django/db/models/manager.py", line 85, in manager_method
    return getattr(self.get_queryset(), name)(*args, **kwargs)
  File "/Users/bjhl/stone-web/lib/python3.6/site-packages/django/db/models/query.py", line 379, in get
    self.model._meta.object_name
loginApp.models.DoesNotExist: Event matching query does not exist.
>>> e2 =Event.objects.filter(name__contains="发布会")
>>> e2
<QuerySet [<Event: 菲菲的新品发布会>, <Event: aa的pro发布会>]>

6、更新数据

>>> Guest.objects.select_for_update().filter(phone='15088132356').update(realname='hjahah')
1
>>> Guest.objects.select_for_update().filter(phone='15088132356')
<QuerySet [<Guest: hjahah>]>