Aggregierte ValidationError-Erfassung in Formular-Bereinigungs-Pipelines

from django import forms
from django.core.exceptions import ValidationError
 
class MultiStepValidationForm(forms.Form):
    payload = forms.CharField(widget=forms.Textarea)
 
    def clean(self):
        cleaned_data = super().clean()
        errors = []
        raw_payload = cleaned_data.get("payload", "")
        
        if not raw_payload.startswith("{"):
            errors.append(ValidationError("Payload must be valid JSON format.", code="invalid_format"))
        if len(raw_payload) > 1000:
            errors.append(ValidationError("Payload exceeds maximum length limit.", code="too_large"))
            
        if errors:
            raise ValidationError(errors)
        return cleaned_data