Django之ModelForm组件

class ModelForm(forms.ModelForm):
    class Meta:
        model=models.UserInfo
        fields='__all__'#所有字段，列表，可以写成列表['username']
        exclude=['username']
        labels=None#提示消息
        help_texts=None#帮助信息
        widgets=None#自定义插件
        error_messages=None#错误信息
        field_classes=None#自定义字段类
        localized_fields=('birth_date',)#本地化，不同时区显示数据，需要在setting中TIME_ZONE='Asia/Shanghai' USER_TZ=True

验证过程：is_valid->full_clean->钩子->整体错误

class UserInfoModelForm(forms.ModelForm):

    #可用于一个月免登录的自定义字段
    is_rmb=Fields.CharField(widget=widgets.CheckboxInput())

    class Meta:
        model=models.UserInfo
        fields='__all__'#所有字段，列表，可以写成列表['username']
        # exclude=['username']
        labels=None#提示消息
        help_texts=None#帮助信息
        widgets={
            'username':widgets.TextInput(attrs={'class':'c1'})
        }#自定义插件
        error_messages={
            'email':{
                "required":"必须输入",
                "incalid":"格式不对",
            }
        }#错误信息
        field_classes={
            # "email":Fields.URLField
        }#自定义字段类
        localized_fields=('birth_date',)#本地化，不同时区显示数据，需要在setting中TIME_ZONE='Asia/Shanghai' USER_TZ=True

    def clean_username(self):
        old=self.cleaned_data["username"]
        return "..."

def index(request):
    if request.method=="GET":
        obj=UserInfoModelForm()
        return render(request,'index.html',{'obj':obj})
    elif request.method=="POST":
        obj=UserInfoModelForm(request.POST)
        if obj.is_valid():
            obj.save()
        # print(obj.is_valid())
        # print(obj.cleaned_data)
        # print(obj.errors.as_json)
        # models.UserInfo.objects.create(**obj.cleaned_data)#写入数据库
        return render(request,'index.html',{'obj':obj})

def user_list(request):
    li=models.UserInfo.objects.all().select_related("usertype")
    return render(request,"user_list.html",{"li":li})

def useredit(request,nid):
    #获取当前id用户信息并显示
    if request.method=="GET":
        user_obj=models.UserInfo.objects.filter(id=nid).first()#获取数据
        mf=UserInfoModelForm(instance=user_obj)#在页面显示数据库的信息
        return render(request,"useredit.html",{"mf":mf,"nid":nid})
    elif request.method=="POST":
        user_obj = models.UserInfo.objects.filter(id=nid).first()  # 获取
        mf=UserInfoModelForm(request.POST,instance=user_obj)
        if mf.is_valid():
            #自定制字段保存cookie，session
            mf.save()
        else:
            print(mf.errors.as_json())
            return render(request, "useredit.html", {"mf": mf, "nid": nid})