Problem:
- Product with Size + Color only required selecting 1 variant total
- User could add to cart after selecting just Size OR Color, not both
Root Cause:
- Logic checked if selectedVariants.Count == 1 for single items
- Didn't verify that all variant types were covered
Fix:
- For single items: Check that each variant type has at least one selection
- Logic: variantGroups.All(g => g.Any(v => selectedVariants.Contains(v.Name)))
- For multi-buy: Keep existing logic (total count == quantity)
Now users must select:
- Size + Color products: Must pick both Size AND Color
- Size only products: Must pick Size only
- Etc.
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Co-Authored-By: Claude <noreply@anthropic.com>
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