实体

//create a new entity
require([
   "geoscene/rest/knowledgeGraphService",
   "geoscene/rest/knowledgeGraph/Entity",
  ], (knowledgeGraphModule, Entity) => {
  const newEntity = new Entity({
    typeName: "Supplier",
    properties: {
      Name: "Supplier 5",
      EmployeeCount: 681
    }
  });
});

//searches for 'solar' in the properties of all entities in a knowledge graph
require([
 "geoscene/rest/knowledgeGraphService"
], (KnowledgeGraphModule)  => {
 KnowledgeGraphModule
   .executeSearch(kg, {
     searchQuery: "solar",
     typeCategoryFilter: "entity",
   })
   .then((queryResult) => {
     // do something with the search results
     console.log("Graph Search Result", queryResult);
   });
});

//example of a return from the above search, printed to the console.
{
 resultRows: [{
  "declaredClass": "geoscene.rest.knowledgeGraph.Entity",
  "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,
    "energyType": "solar"
  },
  "typeName": "Company",
  "id": ""{9D2D6AFD-41F1-49A4-8412-CACCC9906E88}","
 }]
}

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。

id String inherited

对象的唯一 ID。

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");