Javascript 无法查询Amplify数据存储中的多对多关系
我有两个多对多关系的模型。这2种型号是Javascript 无法查询Amplify数据存储中的多对多关系,javascript,graphql,aws-amplify,amplifyjs,aws-amplify-sdk-js,Javascript,Graphql,Aws Amplify,Amplifyjs,Aws Amplify Sdk Js,我有两个多对多关系的模型。这2种型号是订单和产品。一个订单将有许多产品,产品将有许多订单 我的目标是:给定一个orderID,获取订单中productID的列表 因此,我按照这一点将订单分为OrderProducts、Order和Product,如下schema.graphql type Order @model @key(name: "byStore", fields: ["storeID"]) @auth(rules: [{allow: private
订单
和产品
。一个订单
将有许多产品
,产品
将有许多订单
我的目标是:给定一个orderID
,获取订单中productID
的列表
因此,我按照这一点将订单分为OrderProducts
、Order
和Product
,如下schema.graphql
type Order @model @key(name: "byStore", fields: ["storeID"]) @auth(rules: [{allow: private, operations: [read, update, create, delete]}]) {
id: ID!
buyer_name: String
order_total_amount: String
products: [OrderProducts] @connection(keyName: "byOrder", fields: ["id"])
created_at: AWSTimestamp
}
type OrderProducts @model @key(name: "byOrder", fields:["orderID", "productID"]) @key(name: "byProduct", fields:["productID", "orderID"]) @auth(rules: [{allow: private, operations: [read, update, create, delete]}]){
id: ID!
orderID: ID!
productID: ID!
order: Order! @connection(fields: ["orderID"])
product: Product! @connection(fields: ["productID"])
}
type Product @model @key(name: "byStore", fields: ["storeID"]) @auth(rules: [{allow: owner, operations: [create, update, delete]}, {allow: public, provider: iam, operations: [read]}]){
id: ID!
product_name: String!
product_price: String!
created_at: AWSTimestamp
orders: [OrderProducts] @connection(keyName: "byProduct", fields:["id"])
}
但当我像下面这样查询OrderProduct模型时,为了按OrderID获取产品列表:
import { Product, OrderProducts } from '../models';
export const GetAllProductIdByOrderId = async (order) => {
return await DataStore.query(OrderProducts, op => op.orderID("eq", order.id)) // this is actual orderID
}
我得到这个错误的结果是:
Error: Invalid field for model. field: orderID, model: OrderProducts
我尝试的是:
尝试1
我试图在OrderProducts
中添加一个名为getOrderByOrderIDByProductID
的queryField
,如下所示:
type OrderProducts @model @key(name: "byOrder", fields:["orderID", "productID"], queryField: "getOrderByOrderIDByProductID") @key(name: "byProduct", fields:["productID", "orderID"]) @auth(rules: [{allow: private, operations: [read, update, create, delete]}]){
id: ID!
orderID: ID!
productID: ID!
order: Order! @connection(fields: ["orderID"])
product: Product! @connection(fields: ["productID"])
}
然后,amplify push
,amplify codegen models
,在所有这些之后,我无法在我的文件中导入getOrderByOrderIDByProductID
,并获得此错误
warn Attempted import error: 'getOrderByOrderIDByProductID' is not exported from '../models' (imported as 'getOrderByOrderIDByProductID').
所以我检查了我的model/index.js
,它没有导出getOrderByOrderIDByProductID
。所以我不知道我还能做什么
尝试2
我转到AppSync控制台,在我的查询部分看到了getOrderByOrderIDByProductID
,然后我尝试运行此查询:
query MyQuery {
getOrderByOrderIDByProductID(filter: {orderID: {eq: "8649a9da-9ea6-4a30-afe7-6b336a8f853d"}}) {
items {
order {
buyer_name
createdAt
id
}
}
}
}
然后我得到以下输出:
{
"data": {
"getOrderByOrderIDByProductID": null
},
"errors": [
{
"path": [
"getOrderByOrderIDByProductID"
],
"data": null,
"errorType": "MappingTemplate",
"errorInfo": null,
"locations": [
{
"line": 2,
"column": 3,
"sourceName": null
}
],
"message": "Expression block '$[query]' requires an expression"
}
]
}
我无法从查询中获得任何productID
,也不知道结果的含义
我遵循了本文中提到的建议,并在github中进行了报告,如果您想阅读更详细的版本,可以阅读它
总结如下:
只有一个目标:给定一个orderID
,给我一个Order
中productID
的列表
告诉我我做错了什么,如果可能的话,给我举个例子。因为我一直都在关注这个问题