1、获取数据

row_object = models.UserInfo.objects.filter(id=nid).first()    if request.method == "GET":        form = UserModelForm(instance=row_object)        return render(request,'user_edit.html',{"form":form})

2、更新数据

ModelForm实例参数：instance=row_object

form=UserModelForm(data=request.POST,instance=row_object)    if form.is_valid():        form.save()        return redirect("/user/list/")    return render(request,'user_edit.html',{"form":form})

3、数据排序 order_by

ASC（正序）:models.PrettyNum.objects.all().order_by("level")
DESC（倒序）：models.PrettyNum.objects.all().order_by("-level")

4、排除字段exclude

#全副字段fields = "__all__"#排除某一字段exclude = ['level']

5、对用户提交的数据进行格局的校验

5.1 正则表达式
from django.core.validators import RegexValidatorclass PrettyModelForm(forms.ModelForm):    '''新建靓号'''    mobile = forms.CharField(        label="手机号",        validators=[RegexValidator(r'^1[3-9]\d{9}$','手机号格局谬误')]    )    class Meta:        model = models.PrettyNum        # fields = ['mobile','price','level','status']        fields = "__all__"
5.2 勾子办法

clean_字段名

    #验证办法-2:勾子办法from django.core.exceptions import ValidationError    def clean_mobile(self):        txt_mobile = self.cleaned_data['mobile']                if len(txt_mobile) != 11:            #验证不通过            raise ValidationError("格局谬误")        #验证通过，返回用户输出的值         return txt_mobile

6、重定义ModelForm

class PrettyEditModelForm(forms.ModelForm):    '''编辑靓号，定义须要编辑的字段'''    mobile = forms.CharField(disabled=True,label="手机号")    class Meta:        model = models.PrettyNum        fields = ['mobile','price','level','status']def pretty_edit(request,nid):    '''编辑靓号'''    row_object = models.PrettyNum.objects.filter(id=nid).first()    if request.method == "GET":        form = PrettyEditModelForm(instance=row_object) #如果只容许批改局部字段，须要为编辑性能独自写ModelForm

6、查问判断反复字段

6.1 查问判断反复字段
exists = models.PrettyNum.objects.filter(mobile=XXXX).exists()if exists:    raise ValidationError("查问的字段已存在")
6.2 排除本身外的其余反复字段

self.instance.pk

exists = models.PrettyNum.objects.exclude(id=self.instance.pk).filter(mobile=XXXX).exists()