以一个student学生表为例子
class Student(models.Model):
name = models.CharField(verbose_name='名称',max_length=10)
phone = models.CharField(max_length=11,unique=True,verbose_name='手机号')
money = models.FloatField(verbose_name='钱',default=0,null=True)
class Meta:
verbose_name = '学生表'
verbose_name_plural = verbose_name
db_table = 'student'
def __str__(self):
return self.name
校验代码实现
views.py
from django import forms #校验
from django.core.exceptions import ValidationError #异常
#写一个校验的类，用于校验数据
class StudentForm(forms.Form):
# 校验的类
name = forms.CharField(min_length=2,max_length=10)
phone = forms.CharField(min_length=11,max_length=11)
money = forms.FloatField(required=False)# required=True 必传，默认就是True
def clean_phone(self):
'''钩子，自定义校验规则，函数名是clean_字段名 '''
phone = self.cleaned_data['phone'] #把数据中的phone数据拿过来
if models.Student.objects.filter(phone=phone):
raise ValidationError('手机号已存在')
return phone
#页面的后台函数
def student(request):
stu_form = StudentForm(request.POST) #校验的类
if stu_form.is_valid(): # is_valid如果这是合法的
print('cleaned_data',stu_form.cleaned_data)
models.Student.objects.create(**stu_form.cleaned_data)
data = {"msg":"成功"}
else:
print('errors',stu_form.errors.get_json_data())
data = {"msg":"校验失败"}
return HttpResponse(json.dumps(data,ensure_ascii=False))
