数组中类型为 graphql 对象的 GraphQL 字段

Question

我在这里定义了一个 graphQL 对象：

const graphql = require('graphql');
const { GraphQLObjectType } = require('graphql');

const ProductType = new GraphQLObjectType({
    name: 'Product',
    description: 'Product GraphQL Object Schemal Model',
    fields: {
        productId: { type: graphql.GraphQLString },
        SKU: { type: graphql.GraphQLString },
        quantity: { type: graphql.GraphQLFloat },
        unitaryPrice:  { type: graphql.GraphQLFloat },
        subTotal: { type: graphql.GraphQLFloat },
        discount: { type: graphql.GraphQLFloat },
        totalBeforeTax: { type: graphql.GraphQLFloat },
        isTaxAplicable: { type: graphql.GraphQLBoolean },
        unitaryTax: { type: graphql.GraphQLFloat },
        totalTax: { type: graphql.GraphQLFloat }
    }
});

module.exports.ProductType = { ProductType };

然后，我想在另一个 GraphQL 对象中使用此 ProductType，但我需要该对象是一个数组结构，如下所示：

const graphql = require('graphql');
const { GraphQLObjectType } = require('graphql');

const { ProductType } = require('./product');

const ShoppingCartType = new GraphQLObjectType({
    name: 'ShoppingCart',
    description: 'Shopping Cart GraphQL Object Schema Model',
    fields: {
        cartId: { type: graphql.GraphQLString },
        userId: { type: graphql.GraphQLString },
        products: [{ type: ProductType }]
    }
});

module.exports.ShoppingCartType = { ShoppingCartType };

这可能吗？

Answer 1

您需要使用 GraphQLList 包装器来包装现有类型，如下所示：

products: { type: new GraphQLList(ProductType) }