客户端验证 Django

Question

我制作了一个扩展 UserCreationForm 的表单，我想验证客户端的输入。我怎样才能做到这一点？当我验证password1时，它工作正常，但由于某种原因，我无法检查字段是否丢失。提前致谢。

class UserRegisterForm(UserCreationForm):

    email = forms.EmailField()

    class Meta:

        model = User 

        fields = ['username', 'email', 'password1', 'password2']

    def validate(self,password):

        return self.short_enough(password) and self.has_lowercase(password) and self.has_uppercase(password) and self.has_numeric(password) and self.has_special(password)

    def short_enough(self,pw):

         return len(pw) == 8

    def has_lowercase(self,pw):

        'Password must contain a lowercase letter'

        return len(set(string.ascii_lowercase).intersection(pw)) > 0

    def has_uppercase(self,pw):

        'Password must contain an uppercase letter'

        return len(set(string.ascii_uppercase).intersection(pw)) > 0

    def has_numeric(self,pw):

        'Password must contain a digit'

        return len(set(string.digits).intersection(pw)) > 0

    def has_special(self,pw):

        'Password must contain a special character'

        return len(set(string.punctuation).intersection(pw)) > 0

    def clean(self):

        

        cleaned_data = super(UserRegisterForm, self).clean()

        username = cleaned_data.get('username')

        email = cleaned_data.get('email')

        password1 = cleaned_data.get('password1')

        password2 = cleaned_data.get("password2")

        if username == None or email == None or password1 == None or password2 == None:      

              raise forms.ValidationError("Some fields are missing" )

              

        if not self.validate(password1):

            raise forms.ValidationError("Password must be 8 characters(1 upper, 1 lower, 1 number, 1 special character)" )

        else:

            return cleaned_data

Answer 1

好的，您的模板看起来不错，只是在表单中添加了一些内容。为了简化我添加到您定义的电子邮件字段的代码required=True，并将相同的参数设置到__init__其余字段的方法中，这将根据需要执行所有字段，您可以摆脱自定义的“空值”验证cleanclass UserRegisterForm(UserCreationForm):    email = forms.EmailField(required=True)    class Meta:        model = User         fields = ['username', 'email', 'password1', 'password2']    def __init__(self, *args, **kwargs):        super().__init__(*args, **kwargs)        self.fields['username'].required = True        self.fields['password1'].required = True        self.fields['password2'].required = True    def validate(self,password):        return self.short_enough(password) and self.has_lowercase(password) and self.has_uppercase(password) and self.has_numeric(password) and self.has_special(password)    def short_enough(self,pw):         return len(pw) == 8    def has_lowercase(self,pw):        'Password must contain a lowercase letter'        return len(set(string.ascii_lowercase).intersection(pw)) > 0    def has_uppercase(self,pw):        'Password must contain an uppercase letter'        return len(set(string.ascii_uppercase).intersection(pw)) > 0    def has_numeric(self,pw):        'Password must contain a digit'        return len(set(string.digits).intersection(pw)) > 0    def has_special(self,pw):        'Password must contain a special character'        return len(set(string.punctuation).intersection(pw)) > 0    def clean(self):        cleaned_data = super(UserRegisterForm, self).clean()        password1 = cleaned_data.get('password1')        password2 = cleaned_data.get("password2")                  if not self.validate(password1):            raise forms.ValidationError("Password must be 8 characters(1 upper, 1 lower, 1 number, 1 special character)" )        else:            return cleaned_data另一方面，要进行单字段验证，我建议您使用 django 提供的方法clean_<fieldname>。