devicehub-django/admin/forms.py

from django import forms
from utils.device import create_annotation, create_doc, create_index
from utils.save_snapshots import move_json, save_in_disk
from django.forms.formsets import BaseFormSet
from django.forms import formset_factory
from django.core.exceptions import ValidationError

class CustomStatusLabelForm(forms.Form):
    label_name = forms.CharField(
        label="Annotation Name",
        max_length=50,
        widget=forms.TextInput(attrs={'class': 'form-control'})
    )


class CustomStatusValueForm(forms.Form):
    label_state = forms.CharField(
        label="Possible State",
        max_length=50,
        widget=forms.TextInput(attrs={'class': 'form-control'})
    )

class CustomStatusValueFormSet(BaseFormSet):

    """Validation for inputs (no two values should be the same)"""
    def clean(self):
        if any(self.errors):
            return

        label = []
        labels = []
        for form in self.forms:
            label = form.cleaned_data.get('label_state')
            if label:
                if label in labels:
                    raise ValidationError("Duplicate labels are not allowed.")

                labels.append(label)


CustomStatusFormSet = formset_factory(CustomStatusValueForm ,formset = CustomStatusValueFormSet)