Django表单“软”验证,发送回用户以明确确认可疑数据

在这里,您可以找到一个与注释中的链接中给出的示例类似的最小工作示例。您只需小心不要将软验证包括在 clean_MagicNumber(self) 而是使用覆盖的 clean(self) validate_unique(self) 作用

from django.core.exceptions import ValidationError
from django.db import models
from django.contrib import admin
from django import forms
from django.db import models


class Autor(models.Model):
    Name = models.CharField(max_length=64)
    MagicNumber = models.IntegerField()


class AutorAdminForm(forms.ModelForm):
    ConfirmMagicNumber = forms.BooleanField(label="I confirm it is the right magic number.",
                                            required=False,
                                            widget=forms.HiddenInput)

    def _field_is_active(self, field):
        if self._meta.exclude is not None and field in self._meta.exclude:
            return False
        if self._meta.fields is not None and field in self._meta.fields:
            return True
        return False

    def clean_MagicNumber(self):
        if self.cleaned_data['MagicNumber'] < 100 or self.cleaned_data['MagicNumber'] > 1000:
            raise ValidationError("Magic number outside of allowed range between 100 to 1000.")
        return self.cleaned_data['MagicNumber']

    def validate_unique(self):
        """
            We use validate unique because it is quite late in the validation process,
            after we got the values of all fields and
            actually I used it, because I was really warning for a possible duplicate
        """
        super().validate_unique()
        # only check if number does not have errors and is in form data
        if 'MagicNumber' not in self._errors and 'MagicNumber':
            # only check if confirm checkbox is given and not checked
            if ('ConfirmMagicNumber' in self.cleaned_data and 'ConfirmMagicNumber' in self.fields
                and self.cleaned_data['ConfirmMagicNumber'] is not True and self._field_is_active('ConfirmMagicNumber')):
                    if self.cleaned_data['MagicNumber'] not in (100, 200, 381, 525, 1000):
                        error_msg = "The magic number looks wrong. Please confirm it below."
                        self.add_error('MagicNumber', error_msg)
                        self.fields['ConfirmMagicNumber'].widget = forms.CheckboxInput()
                        self.fields['ConfirmMagicNumber'].required = True

@admin.register(Autor)
class AutorAdmin(admin.ModelAdmin):
    form = AutorAdminForm