Django框架 之 form组件的钩子

Django框架 之 form组件的钩子

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def foo(request):         if request.method=="POST":           regForm=RegForm(request.POST)           if regForm.is_valid():             pass             # 可用数据: regForm.cleaned_data,             # 将数据插入数据库表中             else:             pass             # 可用数据: regForm.errors             # 可以利用模板渲染讲errors嵌套到页面中返回             # 也可以打包到一个字典中,用于ajax返回       else:         regForm=RegForm()     return render(request,"register.html",{"regForm":regForm})               '''     实例化时:           self.fields={             "username":"字段规则对象",             "password":"字段规则对象",           }         is_valid时:           self._errors = {}         self.cleaned_data = {}             #局部钩子:           for name, field in self.fields.items():               try:                       value = field.clean(value)                     self.cleaned_data[name] = value                     if hasattr(self, 'clean_%s' % name):                         value = getattr(self, 'clean_%s' % name)()                         self.cleaned_data[name] = value               except ValidationError as e:                     self.add_error(name, e)           # 全局钩子:           self.clean()     # def self.clean():return self.cleaned_data           return  not self.errors    # True或者False         '''

示例：

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from django import forms   class LoginForm(forms.Form):     username = forms.CharField(label='username', max_length=100)     password = forms.CharField(label='password', max_length=100)           #钩子函数为对应字段添加判断条件     def clean_username(self):         if len(self.cleaned_data.get("username"))>5:             print(self.cleaned_data.get("password"))             return self.cleaned_data.get("username")     def clean_password(self):         pass     #全局钩子函数     def clean(self):         if self.cleaned_data["password"] == self.cleaned_data["repeat_password"]:             return self.cleaned_data