数组中类型为 graphql 对象的 GraphQL 字段

Posted 2023-03-08

【中文标题】数组中类型为 graphql 对象的 GraphQL 字段

【英文标题】：GraphQL field of type graphql object within an array

【发布时间】：2018-08-15 02:04:30

【问题描述】：

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？

【参考方案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)