Relationship

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

A relationship is an instance of a relationship type that defines an association between two entities. Examples include "owns", "called", or "employed by". A relationship is described in a single direction. Every relationship describes an association from one entity to another entity. If two people in a family are siblings, each person entity requires a separate sibling-of relationship to the other entity to fully describe the relationship.

See also
Examples
// sample creation of new Relationship object
require([
 "esri/rest/knowledgeGraphService",
 "esri/rest/knowledgeGraph/Relationship",
], (knowledgeGraphModule, Relationship) => {
  const newRelationship = new Relationship({
    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": "esri.rest.Relationship.Relationship",
 "originId": "1234",
 "destinationId": "5678",
 "properties": {
   "order_day": "Sunday",
   "quantity": 15000
 },
 "typeName": "buys_part",
 "id": "{ANWIFHSAS-AW6F-G9W4-8412-A1A8W4F1A5S6F}",
}]

Constructors

new Relationship(properties)
Parameter
properties Object

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

Example
const newRelationship = new Relationship({
  typeName: "buys_part",
  properties: {
    quantity: 5000
  },
  destinationId: "{HNEIS053-AW6F-G9W4-8412-MROEJHM25694}",
  originId: "{D1HRH4D3-1RE5-JTRH-1D5F-21TH8HRDHTRS}"
});

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 ID of the destination entity of the relationship (i.e.

more details
Relationship
String

The unique ID of the object.

more details
GraphNamedObject
String

The ID of the origin entity of the relationship (i.e.

more details
Relationship
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.

destinationId String

The ID of the destination entity of the relationship (i.e. the 'to' entity).

The unique ID of the object.

originId String

The ID of the origin entity of the relationship (i.e. the 'from' entity).

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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