Entity

AMD: require(["esri/rest/knowledgeGraph/Entity"], (Entity) => { /* code goes here */ });
ESM: import Entity from "@arcgis/core/rest/knowledgeGraph/Entity";
Class: esri/rest/knowledgeGraph/Entity
Inheritance: Entity GraphNamedObject GraphObject Accessor
Since: ArcGIS API for JavaScript 4.25
beta

An entity is a specific instance of an EntityType that can exist in the knowledge graph. Entities typically represent real-world objects or locations such as a person, an organization, a building, or a vehicle. Each entity has a set of properties that is defined by the entity type it belongs to.

See also
Examples
//create a new entity
require([
   "esri/rest/knowledgeGraphService",
   "esri/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([
 "esri/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": "esri.rest.knowledgeGraph.Entity",
  "properties": {
    "shape": {
      "declaredClass": "esri.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}","
 }]
}

Constructors

new Entity(properties)
Parameter
properties Object
optional

See the properties for a list of all the properties that may be passed into the constructor.

Example
// create a new entity object
const newEntity = new Entity({
    typeName: "Supplier",
    properties: {
      Name: "Supplier 5",
      EmployeeCount: 681
    }
s});

Property Overview

Any properties can be set, retrieved or listened to. See the Working with Properties topic.
Show inherited properties Hide inherited properties
Name Type Summary Class
String

The name of the class.

more details
Accessor
String

The unique ID of the object.

more details
GraphNamedObject
Object

The properties of the graph object.

more details
GraphObject
String

Specifies the name for all similar types of objects (entities or relationships) defined in the knowledge graph.

more details
GraphNamedObject

Property Details

declaredClass Stringreadonly inherited

The name of the class. The declared class name is formatted as esri.folder.className.

The unique ID of the object.

properties Object inherited

The properties of the graph object. For entities and relationships the properties are specified by its entity type or relationship type. The values of the properties are specific to the object.

Examples
//example of properties structure that includes geometry
"properties": {
  "shape": {
    "declaredClass": "esri.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": "esri.rest.knowledgeGraph.Entity",
  "properties": {
    "Name": "Suncommon",
    "Employee_Count": 400,
    "energyType": "solar"
  },
  "typeName": "Company",
  "id": "1256"
},
{
  "declaredClass": "esri.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": "esri.rest.Relationship.Relationship",
  "properties": {
    "start_date": "2020-04-17",
    "employee_id": "4589",
    "office": "152 Building A"
  },
  "typeName": "Employed_by",
  "id": "B7889541"
},
{
  "declaredClass": "esri.rest.Relationship.Relationship",
  "properties": {
    "quantity": 125000,
    "frequency": "bi-weekly",
    "contact_person": "Betty White"
  },
  "typeName": "buys_part",
  "id": "B7889541"
}]
typeName String inherited

Specifies the name for all similar types of objects (entities or relationships) defined in the knowledge graph. For example, all 'employee' entities in a knowledge graph of an organization might have the typeName 'employee'.

Method Overview

Show inherited methods Hide inherited methods
Name Return Type Summary Class

Adds one or more handles which are to be tied to the lifecycle of the object.

more details
Accessor
Boolean

Returns true if a named group of handles exist.

more details
Accessor

Removes a group of handles owned by the object.

more details
Accessor

Method Details

addHandles(handleOrHandles, groupKey)inherited

Adds one or more handles which are to be tied to the lifecycle of the object. The handles will be removed when the object is destroyed.

// 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);
Parameters
handleOrHandles WatchHandle|WatchHandle[]

Handles marked for removal once the object is destroyed.

groupKey *
optional

Key identifying the group to which the handles should be added. All the handles in the group can later be removed with Accessor.removeHandles(). If no key is provided the handles are added to a default group.

hasHandles(groupKey){Boolean}inherited

Returns true if a named group of handles exist.

Parameter
groupKey *
optional

A group key.

Returns
Type Description
Boolean Returns true if a named group of handles exist.
Example
// Remove a named group of handles if they exist.
if (obj.hasHandles("watch-view-updates")) {
  obj.removeHandles("watch-view-updates");
}
removeHandles(groupKey)inherited

Removes a group of handles owned by the object.

Parameter
groupKey *
optional

A group key or an array or collection of group keys to remove.

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

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

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