Django学习笔记之form组件的局部钩子和全局钩子

本文通过注册页面的form组件，查看其中使用的全局钩子和局部钩子。

# Create your views here.
class RegForm(forms.Form):
    username = forms.CharField(
        min_length=3,
        label="用户名",
        help_text=‘‘,
        error_messages={
            "required": "不能为空",
            "invalid": "格式错误",
            "min_length": "用户名最短8位"
        }
    )
    password = forms.CharField(
        min_length=3,
        label="密码",

        help_text=‘6~16个字符，区分大小写‘,
        error_messages={
            "required": "不能为空",
            "invalid": "格式错误",
        },
        widget=forms.widgets.PasswordInput
    )

    re_password = forms.CharField(
        min_length=3,
        label="确认密码",

        help_text=‘请再次填写密码‘,
        error_messages={
            "required": "不能为空",
            "invalid": "格式错误",
        },
        widget=forms.widgets.PasswordInput)

    gender = forms.fields.ChoiceField(
        choices=((1, "男"), (2, "女"), (3, "保密")),
        label="性别",
        initial=3,
        widget=forms.widgets.RadioSelect
    )
    
    phone = forms.fields.CharField(
        label="电话",
        error_messages={
            "required": "不能为空",
        },
    )

    email = forms.fields.CharField(
        label=‘邮箱‘,
        help_text=‘6~18个字符，可使用字母、数字、下划线‘,
        widget=forms.widgets.EmailInput,
        error_messages={
            "required": "不能为空",
            "invalid": "格式错误",
        },
    )
    
    # 批量给form表单里的字段加样式
    def __init__(self, *args, **kwargs):
        super().__init__(*args, **kwargs)
        for field in iter(self.fields):
            field_obj = self.fields[field]
            if not isinstance(field_obj, forms.fields.ChoiceField):
                field_obj.widget.attrs.update({‘class‘: ‘form-control‘})
    
    # 全局钩子，此处用来判断两次输入的密码 
    def clean(self):
        pwd = self.cleaned_data.get(‘pwd‘)
        re_pwd = self.cleaned_data.get(‘re_pwd‘)
        if pwd != re_pwd:
            self.add_error(‘re_pwd‘, ‘两次密码不一致‘)
            raise ValidationError(‘两次密码不一致‘)
        else:
            return self.cleaned_data
    
    # 局部钩子函数，写给phone的校验函数
    def clean_phone(self):
        phone = self.cleaned_data.get(‘phone‘)
        if not re.findall(‘^1[0-9]{10}$‘, phone):
            raise ValidationError("格式错误！")
        else:
            return phone