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我正在尝试遵循GraphQL-Mesh中的示例并用我自己的端点替换端点以查看它是如何工作的。默认的 github 示例有效，但是当我尝试为我的示例提供网格时，它会引发以下错误：

$ "C:\Kiran\example\GraphQLMesh\node_modules\.bin\graphql-mesh" serve
Debugger listening on ws://127.0.0.1:64627/889629dc-8f00-446e-8927-5bdcd2791e10
For help, see: https://nodejs.org/en/docs/inspector
Debugger attached.
(node:13408) ExperimentalWarning: The fs.promises API is experimental
error: Unable to serve mesh:  Cannot read property 'concat' of undefined {"stack":"TypeError: Cannot read property 'concat' of undefined\n    at schemas.forEach (C:\\Kiran\\example\\GraphQLMesh\\node_modules\\@graphql-mesh\\odata\\index.cjs.js:493:51)\n    at Array.forEach (<anonymous>)\n    at ODataHandler.getMeshSource (C:\\Kiran\\example\\GraphQLMesh\\node_modules\\@graphql-mesh\\odata\\index.cjs.js:471:67)\n    at process._tickCallback (internal/process/next_tick.js:68:7)"}
Waiting for the debugger to disconnect...
Done in 9.93s.
Waiting for the debugger to disconnect...

我.meshrc.yaml的很简单，如下图

sources:
  - name: Mytest
    handler:
      odata:
        baseUrl: http://localhost:6001/odata/v1/
        batch: multipart
        expandNavProps: true

serve:
  exampleQuery: northwind-example.graphql

并且 package.json 也只是 github 中的内容的副本

{
  "name": "odata-example",
  "version": "0.7.30",
  "license": "MIT",
  "private": true,
  "scripts": {
    "start": "graphql-mesh serve"
  },
  "dependencies": {
    "@graphql-mesh/cli": "^0.12.1",
    "@graphql-mesh/odata": "0.7.1",
    "graphql": "^15.4.0"
  }
}

当我点击http://localhost:6001/odata/v1/Postman 上的 odata 端点 ( ) 时，我看到以下响应：

标题

Status Code: 200 OK
content-type: application/json; odata.metadata=minimal; odata.streaming=true; charset=utf-8
date: Sat, 05 Dec 2020 06:52:51 GMT
odata-version: 4.0
server: Kestrel
transfer-encoding: chunked

回复

{
  "@odata.context": "http://localhost:6001/odata/v1/$metadata",
  "value": [{
    "name": "Products",
    "kind": "EntitySet",
    "url": "Products"
  }, {
    "name": "Categories",
    "kind": "EntitySet",
    "url": "Categories"
  }, {
    "name": "Suppliers",
    "kind": "EntitySet",
    "url": "Suppliers"
  }]
}

我的示例查询也很简单，如下所示：

query fetchCatagories {
  myCatagories {
    CategoryId
    CategoryName
      Description
    Products {
      ProductName
        OrderDetails {
            OrderId
        }
    }
    Catagories(queryOptions: { top: 1 }) {
      Description
    }
  }
}

我在示例中缺少什么来使网格正常工作并生成 GraphQL 端点？

另外，我是否真的需要 OData 的 example.graphql，因为任何 OData 服务都将具有 /$metadata 端点来公开架构？

更新 1

我也不能让它与公共 odata 端点一起工作，比如https://services.odata.org/V3/OData/OData.svc/

只有默认示例端点有效

https://graph.microsoft.com/${GRAPH_VERSION:v1.0}

https://services.odata.org/TripPinRESTierService/(S(qzsyox3345c15qeq305pblvw))/

这里发生了什么？

4

1 回答 1

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如果您遇到此问题，它是 odata 模块中的一个错误，并且 PR 修复可在此处获得

于 2020-12-09T11:26:04.127 回答