关系

// sample creation of new Relationship object
require([
 "geoscene/rest/knowledgeGraphService",
 "geoscene/rest/knowledgeGraph/Relationship",
], (knowledgeGraphModule, Relationship) => {
  const newRelationship = new 关系({
    typeName: "buys_part",
    properties: {
      quantity: 5000
    },
    destinationId: "{HNEIS053-AW6F-G9W4-8412-MROEJHM25694}",
    originId: "{D1HRH4D3-1RE5-JTRH-1D5F-21TH8HRDHTRS}"
  })
});

// sample relationship returned as a result of a search or query on a knowledge graph
[{
 "declaredClass": "geoscene.rest.Relationship.Relationship",
 "originId": "1234",
 "destinationId": "5678",
 "properties": {
   "order_day": "Sunday",
   "quantity": 15000
 },
 "typeName": "buys_part",
 "id": "{ANWIFHSAS-AW6F-G9W4-8412-A1A8W4F1A5S6F}",
}]

属性概述

属性详细信息

declaredClass Stringreadonly inherited

类的名称。声明的类名称格式化为 geoscene.folder.className。

destinationId String

关系目标实体的 ID (即 'to' 实体)。

id String inherited

对象的唯一 ID。

originId String

关系原始实体的 ID (即 'from’ 实体)。

properties Object inherited

图谱对象的属性。对于实体和关系，属性由其实体类型或关系类型指定。属性的值特定于对象。

示例

//example of properties structure that includes geometry
"properties": {
  "shape": {
    "declaredClass": "geoscene.geometry.Point",
    "cache": {},
    "hasM": false,
    "hasZ": false,
    "latitude": 53.589000000000009,
    "longitude": -0.9633,
    "type": "point",
    "extent": null,
    "spatialReference": {
      "wkid": 4326
    },
    "x": -0.9633,
    "y": 53.589000000000009
  },
  "Name": "Suncommon",
  "Employee_Count": 400,
  "Address": "123 Broadway, New York, New York",
  "EnergyType": "solar"
}

//two entities of different entity types with different properties
[{
  "declaredClass": "geoscene.rest.knowledgeGraph.Entity",
  "properties": {
    "Name": "Suncommon",
    "Employee_Count": 400,
    "energyType": "solar"
  },
  "typeName": "Company",
  "id": "1256"
},
{
  "declaredClass": "geoscene.rest.knowledgeGraph.Entity",
  "properties": {
    "Name": "Empire State Building",
    "height": 1454,
    "heightUnits": "feet",
    "city": "New York"
  },
  "typeName": "Building",
  "id": "B7889541"
}]

//two relationships of different relationship types with different properties
[{
  "declaredClass": "geoscene.rest.Relationship.Relationship",
  "properties": {
    "start_date": "2020-04-17",
    "employee_id": "4589",
    "office": "152 Building A"
  },
  "typeName": "Employed_by",
  "id": "B7889541"
},
{
  "declaredClass": "geoscene.rest.Relationship.Relationship",
  "properties": {
    "quantity": 125000,
    "frequency": "bi-weekly",
    "contact_person": "Betty White"
  },
  "typeName": "buys_part",
  "id": "B7889541"
}]

typeName String inherited

指定知识图谱中定义的所有类似类型对象 (entities 或 relationships) 的名称。例如，组织的知识图谱中的所有 'employee’ 实体都可能具有 typeName 'employee'。

方法概述

方法详细说明

addHandles(handleOrHandles, groupKey)inherited

添加一个或多个与对象的生命周期相关联的句柄。当对象被销毁时，将移除句柄。

// Manually manage handles
const handle = reactiveUtils.when(
  () => !view.updating,
  () => {
    wkidSelect.disabled = false;
  },
  { once: true }
);

// Handle gets removed when the object is destroyed.
this.addHandles(handle);

参数

handleOrHandles WatchHandle|WatchHandle[] 对象销毁后，标记为要移除的句柄。

groupKey * optional 标识句柄应添加到的组的键。组中的所有句柄稍后都可使用 Accessor.removeHandles() 进行删除。如果未提供键，则句柄将被添加到默认组。

hasHandles(groupKey){Boolean}inherited

如果存在指定的句柄组，则返回 true。

参数

groupKey * optional 组键。

返回

类型	描述
Boolean	如果存在指定的句柄组，则返回 true。

示例

// Remove a named group of handles if they exist.
if (obj.hasHandles("watch-view-updates")) {
  obj.removeHandles("watch-view-updates");
}

removeHandles(groupKey)inherited

移除对象拥有的句柄组。

参数

groupKey * optional 要移除的组键或组键的数组或集合。

示例

obj.removeHandles(); // removes handles from default group

obj.removeHandles("handle-group");
obj.removeHandles("other-handle-group");