模糊查询：
student/views.py文件
from django.shortcuts import HttpResponse
from .models import Student
def student_add(request):
# stu=Student(name="李四",age=18,sex=0,birthday="2021-11-23")
# stu.save()
# print(stu.name)
# print(stu.age)
# print(stu.sex)
# print(stu.birthday)
stu = Student.objects.create(name="郑十", age=15, sex=0, birthday="2002-2-2")
print(stu.name)
print(stu.age)
print(stu.sex)
print(stu.birthday)
return HttpResponse("添加成功")
def student_select(request):
## 查询所有名字中有张的学生
stu1=Student.objects.filter(name__contains='张')
stu2 = Student.objects.filter(name__startswith='张')
stu3 = Student.objects.filter(name__endswith='三')
print(stu1,stu2,stu3)
## 查询名字不为空的记录
stu4 = Student.objects.filter(name__isnull=False)
print(stu4)
## 大于gt、gte大于等于、lt小于、lte小于等于
stu5 = Student.objects.filter(age__gt=30)
stu6 = Student.objects.filter(age__gte=20)
stu7 = Student.objects.filter(age__lt=30)
stu8 = Student.objects.filter(age__lte=20)
print("大于30岁的：",stu5, "大于等于20岁的：",stu6, "小于30岁的：",stu7, "小于等于20岁的：",stu8)
## 查询年龄在20-40之间的学生
stu9=Student.objects.filter(age__range=(20,40))
print(stu9)
print("*" * 100)
## 查询年龄在*** 中的学生
stu10=Student.objects.filter(age__in=[18,19,20])
print(stu10)
## 查询出生在1985的学生:year/year/month/day/week_day/hour/minute/second
stu11=Student.objects.filter(birthday__year=1985)
print(stu11)
return HttpResponse("*******************模糊查询成功*******************")
