GraphQL 错误：int() 参数必须是字符串或数字，而不是“列表”

Question

I have this mutation:

export const SET_CART_MUTATION = gql`mutation setCartMutation($vendorSlug: String!, $sessionId: String, $productId:[Int!], $prices:[PriceInput]) {
  setCart(vendorSlug: $vendorSlug, sessionId: $sessionId, productId:$productId, prices:$prices) {
    cart {
      ${CART_FIELDS}
    }
    allTicketsAdded
  }
}`

I want to create an array of productId but when I mutate: I get:

Mutation error: Error: GraphQL error: int() argument must be a string or a number, not 'list'

My setCart class is:

class SetCart(graphene.Mutation):
    class Arguments:
        vendor_slug = graphene.String()
        session_id = graphene.String()
        product_id = graphene.List(graphene.Int)
        prices = graphene.List(PriceInput)

Thanks for help, and ask questions.

Answer 1

I solved it,

If you have the same error and you're sure that's the mutation arguments are the same type as declared: the problem come from your mutation function:

def mutate(self, info, vendor_slug, session_id, products, prices, participants):
        # ? List of products given
        products = Product.objects.get(id=product)
        cart = Order.objects.get_cart(
            vendor_slug, info.context.user, session_id)

The error come from Product.objects.get(id=product) because product is an array Correction:

products = [Product.objects.get(id=product) for product in products]