22 lines
No EOL
957 B
Python
22 lines
No EOL
957 B
Python
from django.core.exceptions import ValidationError
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from django.db.models.signals import m2m_changed
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from django.dispatch import receiver
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from .models import TradeOffer
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from cards.models import Card
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def check_trade_offer_rarity(instance):
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combined_cards = list(instance.have_cards.all()) + list(instance.want_cards.all())
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# Use the normalized rarity from each card
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rarities = {card.normalized_rarity for card in combined_cards}
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if len(rarities) > 1:
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raise ValidationError("All cards in a trade offer must have the same rarity.")
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@receiver(m2m_changed, sender=TradeOffer.have_cards.through)
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def validate_have_cards_rarity(sender, instance, action, **kwargs):
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if action == "post_add":
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check_trade_offer_rarity(instance)
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@receiver(m2m_changed, sender=TradeOffer.want_cards.through)
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def validate_want_cards_rarity(sender, instance, action, **kwargs):
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if action == "post_add":
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check_trade_offer_rarity(instance) |