Question

我在管道中使用$graphLookup创建了一个视图，但失败了。有人有什么想法吗？

$cmd：

{
  "create": "employee.view.list",
  "viewOn": "employee",
  "pipeline": [
    {
      "$graphLookup": {
        "from": "employee.view.list",
        "connectToField": "_id",
        "startWith": "$supervisor",
        "connectFromField": "supervisor",
        "as": "supervisors",
        "maxDepth": 10
      }
    }
  ]
}

错误

检测到查看周期：test_sw-aggregation-test.employee.view.list =＆gt; test_sw聚集-test.employee.view.list

Answer 1

您收到此错误的原因是您创建的视图与要在其文档中执行employee.view.list的集合同名。

同样{ "ok" : 0, "errmsg" : "a view 'employee.view.list' already exists", "code" : 48, "codeName" : "NamespaceExists" }不是预定义视图，在这种情况下，您将收到如下所示的错误消息：

yum install spark

如何在MongoDB 3.4.0中使用$ graphLookup创建视图？

1 个答案: