Ibm cloud 在Bluemix Graph DB中使用set属性创建顶点的正确方法是什么？

我正在尝试在Bluemix Graph DB服务中创建一个新的顶点。我的数据库的模式如下所示

{“propertyKeys”：[{“name”：“name”，“dataType”：“String”，“cardinality”：“SINGLE”}，{“name”：“languages”，“dataType”：“String”，“cardinality”：“SET”}，{“name”：“picture”，“dataType”：“String”，“cardinality”：“SINGLE”}，{“name”：“String”，“cardinality”：“SINGLE”；“SINGLE”}，{“name”：“bytes”，“dataType”：“Integer”，“cardinality”：“SINGLE：“github_id”，“dataType:“String”，“cardinality:“SINGLE”}，{“name”：“twitter_id”，“dataType:“SINGLE”}，{“name”：“language_percentage”，“dataType:“Float”，“cardinality:“SINGLE”}]，“vertexLabels:[{“name:“person”}]，“edgeLabels:[{“name:“codes_in”，“multiality:“MULTI”}，{“name:{“name”}，{“name”：“multiplicity:“multiplicity:”，“VertexIndex”：[{“名称”：“vByName”，“propertyKeys”：[“名称”]，“复合”：true，“唯一”：false}，{“名称”：“vByPreferredLang”，“propertyKeys”：[“首选语言”]，“复合”：true，“唯一”：false}，{“名称”：“vByLanguages”，“propertyKeys”：[“语言”]，“复合”：false，“唯一”：false}]，“EdgeIndex”：[{“名称”：“eByName”，“propertyKeys”：“名称”，“复合”：true，“unique”：false}，{“name”：“eByLanguagePercentage”，“propertyKeys”：[“language_percentage”]，“composite”：true，“unique”：false}]

我正在尝试使用以下柱体创建顶点

{“name”：“Bob”，“languages”：[“Node”，“Python”]，“picture”：https://en.gravatar.com/userimage/12148147/46ccae88e5aae747d53e0b1863f72a4e.jpg?size=200“，”首选语言“：”节点“，”github\u id“：”Bob“，”twitter\u id“：”Bob”}

但是，这会导致以下错误

{“code”：“BadRequestError”，“message”：“具有元属性的属性‘语言’需要有一个‘val’”}

---

languages属性的基数为SET，为SET数据类型创建属性的正确方法是什么？我会假设它是一个JSON数组。

Ryan，SET不是数据类型。您还可以将语言设置为带有分隔值的字符串

---

Beta版中支持的唯一类型是：String、Integer、Boolean、Float、Ryan、SET不是数据类型。您还可以将语言设置为带有分隔值的字符串

---

Beta版本中支持的唯一类型是：字符串、整数、布尔值、浮点值

问题在于，您试图创建一个数据类型为

List

的单顶点属性，这在IBM Graph中不受支持（仅支持JSON基元类型）。要利用具有

集

数据类型的属性，需要创建多个顶点属性

事实证明，TinkerPop中基数和数据类型之间的区别可能有点混淆。这里有一个例子可以说明问题：

$ curl https://ibmgraph/11/g/schema -XPOST -Hcontent-type:application/json -d '{"propertyKeys":[{"name":"languages","dataType":"String","cardinality":"SET"}]}' | jq .
{
  "requestId": "9e0ea947-f9a1-407b-ab1a-cd9b7fd5d561",
  "status": {
    "message": "",
    "code": 200,
    "attributes": {}
  },
  "result": {
    "data": [
      {
        "propertyKeys": [
          {
            "name": "languages",
            "dataType": "String",
            "cardinality": "SET"
          }
        ],
        "vertexLabels": [],
        "edgeLabels": [],
        "vertexIndexes": [],
        "edgeIndexes": []
      }
    ],
    "meta": {}
  }
}
$ curl https://ibmgraph/11/g/vertices -XPOST | jq .
{
  "requestId": "2ce85907-2aca-4630-876f-31775e74e1de",
  "status": {
    "message": "",
    "code": 200,
    "attributes": {}
  },
  "result": {
    "data": [
      {
        "id": 4112,
        "label": "vertex",
        "type": "vertex",
        "properties": {}
      }
    ],
    "meta": {}
  }
}
$ curl https://ibmgraph/11/g/vertices/4112 -XPOST -Hcontent-type:application/json -d '{"languages":"Node"}' | jq .
{
  "requestId": "52ad6d49-46c9-41aa-9928-5a567099d773",
  "status": {
    "message": "",
    "code": 200,
    "attributes": {}
  },
  "result": {
    "data": [
      {
        "id": 4112,
        "label": "vertex",
        "type": "vertex",
        "properties": {
          "languages": [
            {
              "id": "si-368-sl",
              "value": "Node"
            }
          ]
        }
      }
    ],
    "meta": {}
  }
}
$ curl https://ibmgraph/11/g/vertices/4112 -XPOST -Hcontent-type:application/json -d '{"languages":"Python"}' | jq .
{
  "requestId": "19886949-6328-4e19-8cac-8fdab37ef2a5",
  "status": {
    "message": "",
    "code": 200,
    "attributes": {}
  },
  "result": {
    "data": [
      {
        "id": 4112,
        "label": "vertex",
        "type": "vertex",
        "properties": {
          "languages": [
            {
              "id": "si-368-sl",
              "value": "Node"
            },
            {
              "id": "16q-368-sl",
              "value": "Python"
            }
          ]
        }
      }
    ],
    "meta": {}
  }
}

---

问题在于，您试图创建一个数据类型为

List

的单个顶点属性，这在IBM Graph中不受支持（仅支持JSON基元类型）。要利用具有

集

数据类型的属性，需要创建多个顶点属性

事实证明，TinkerPop中基数和数据类型之间的区别可能有点混淆。这里有一个例子可以说明问题：

$ curl https://ibmgraph/11/g/schema -XPOST -Hcontent-type:application/json -d '{"propertyKeys":[{"name":"languages","dataType":"String","cardinality":"SET"}]}' | jq .
{
  "requestId": "9e0ea947-f9a1-407b-ab1a-cd9b7fd5d561",
  "status": {
    "message": "",
    "code": 200,
    "attributes": {}
  },
  "result": {
    "data": [
      {
        "propertyKeys": [
          {
            "name": "languages",
            "dataType": "String",
            "cardinality": "SET"
          }
        ],
        "vertexLabels": [],
        "edgeLabels": [],
        "vertexIndexes": [],
        "edgeIndexes": []
      }
    ],
    "meta": {}
  }
}
$ curl https://ibmgraph/11/g/vertices -XPOST | jq .
{
  "requestId": "2ce85907-2aca-4630-876f-31775e74e1de",
  "status": {
    "message": "",
    "code": 200,
    "attributes": {}
  },
  "result": {
    "data": [
      {
        "id": 4112,
        "label": "vertex",
        "type": "vertex",
        "properties": {}
      }
    ],
    "meta": {}
  }
}
$ curl https://ibmgraph/11/g/vertices/4112 -XPOST -Hcontent-type:application/json -d '{"languages":"Node"}' | jq .
{
  "requestId": "52ad6d49-46c9-41aa-9928-5a567099d773",
  "status": {
    "message": "",
    "code": 200,
    "attributes": {}
  },
  "result": {
    "data": [
      {
        "id": 4112,
        "label": "vertex",
        "type": "vertex",
        "properties": {
          "languages": [
            {
              "id": "si-368-sl",
              "value": "Node"
            }
          ]
        }
      }
    ],
    "meta": {}
  }
}
$ curl https://ibmgraph/11/g/vertices/4112 -XPOST -Hcontent-type:application/json -d '{"languages":"Python"}' | jq .
{
  "requestId": "19886949-6328-4e19-8cac-8fdab37ef2a5",
  "status": {
    "message": "",
    "code": 200,
    "attributes": {}
  },
  "result": {
    "data": [
      {
        "id": 4112,
        "label": "vertex",
        "type": "vertex",
        "properties": {
          "languages": [
            {
              "id": "si-368-sl",
              "value": "Node"
            },
            {
              "id": "16q-368-sl",
              "value": "Python"
            }
          ]
        }
      }
    ],
    "meta": {}
  }
}