la-chariotte/la_chariotte/order/forms.py

from django.contrib.auth.models import User
from django.core.exceptions import NON_FIELD_ERRORS, ValidationError
from django.db import IntegrityError
from django.forms import CharField, ModelForm

from la_chariotte.order.models import GroupedOrder, Item


class GroupedOrderForm(ModelForm):
    class Meta:
        model = GroupedOrder
        fields = ["name", "deadline", "delivery_date", "place", "description"]

    def __init__(self, *args, **kwargs):
        self.user = kwargs.pop("user")
        super().__init__(*args, **kwargs)

    def save(self, commit=True):
        self.instance.orga = User.objects.get(id=self.user.pk)
        return super().save(commit=commit)

    def clean(self):
        cleaned_data = self.cleaned_data

        try:
            GroupedOrder.objects.get(
                name=cleaned_data["name"],
                delivery_date=cleaned_data["delivery_date"],
                orga=User.objects.get(id=self.user.pk),
            )
        except GroupedOrder.DoesNotExist:
            pass
        else:
            raise ValidationError(
                "Une commande groupée avec le même titre et la même date existe déjà"
            )
        return cleaned_data


class ItemCreateForm(ModelForm):
    class Meta:
        model = Item
        fields = ["name", "price", "max_limit"]

    def __init__(self, *args, **kwargs):
        self.grouped_order = kwargs.pop("grouped_order")  # type: GroupedOrder
        super().__init__(*args, **kwargs)

    def save(self, commit=True):
        self.instance.grouped_order = GroupedOrder.objects.get(id=self.grouped_order.pk)
        return super().save(commit=commit)