Path

import Path from "@arcgis/core/rest/knowledgeGraph/Path.js";

Inheritance:: Path→Accessor

Since: ArcGIS Maps SDK for JavaScript 4.25

An object containing all entities and relationships required to traverse a graph from one entity to another. A path can be restricted by the type and number of relationships used to connect entities. For example, a query that asks for the path between entity a and entity c would return a Path containing the relationships between a-b and b-c as well as the entities a, b, and c.

Sample of the structure of a path object returned from executeQuery() using the query MATCH q = (a)-->()-->(c) RETURN q LIMIT 1 which returns a path with intermediary entity.

KnowledgeGraphModule.executeQuery(
 knowledgeGraph, //graph
 {
   //query returning path from `a` to `c` with any intermediary entity
   openCypherQuery: "MATCH q = (a)-->()-->(c) RETURN q LIMIT 1",
  }).then((queryResult) => {
    //do something with the result
   //console.log(queryResult.ResultRows)
});

//sample output from the above query
[{
 "declaredClass": "esri.rest.knowledgeGraph.Path",
 "path": [
     {// entity `a`
      "declaredClass": "esri.rest.knowledgeGraph.Entity",
      "properties": {
       "name": "ABC Contractors",
       "CompanyType": "Construction",
     },
     "typeName": "Company",
     "id": "C1234"
   },
   { //relationship `a-b`
     "declaredClass": "esri.rest.Relationship.Relationship",
     "originID": "C1234",
     "destinationID": "S444",
     "properties": {
        "contract_expiration_date": "2025-05-26",
        "contact_person": "Jon Doe"
     },
     "typeName": "supplied_by",
     "id": "SB001"
   },
   { //entity `b`
    "declaredClass": "esri.rest.knowledgeGraph.Entity",
     "properties": {
       "objectid": 1,
       "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
       },
       "Employee_Count": 400,
       "Name": "Quality Metal Supply",
     },
     "typeName": "Supplier",
     "id": "S444",
   },
   { //relationship `b-c`
     "declaredClass": "esri.rest.Relationship.Relationship",
     "originID": "S444",
     "destinationID": "P789",
     "properties": {
       "frequency": "2 weeks",
       "quantity": 125000,
     },
     "typeName": "buys_part",
     "id": "BP456"
   },
   {// entity `c`
     "declaredClass": "esri.rest.knowledgeGraph.Entity",
     "properties": {
       "Name": "steel plate",
       "width": "15cm",
       "height": "10cm"
     },
     "typeName": "Part",
     "id": "P789"
   }
 ]
}]

Constructors

Constructor

Parameters

Parameter	Type	Description	Required
properties	`PathProperties`

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

Properties

Any properties can be set, retrieved or listened to. See the Watch for changes topic.

Property	Type	Class
`declaredClass` readonly inherited	`string`	Accessor
`path`	`GraphNamedObject[]`

declaredClass

readonlyinherited Property

Type: string

Inherited from: Accessor

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

autocast Property

Type: GraphNamedObject[]

Array of entities and relationships where the first element is the starting entity of the path, the final element is the ending entity of the path, and intermediary elements are entities and relationships connecting the two.

Methods

Method	Signature	Class
`fromJSON` inherited static	`fromJSON(json: any): any`	JSONSupportMixin
`toJSON` inherited	`toJSON(): any`	JSONSupportMixin

fromJSON

inheritedstatic Method

Signature: fromJSON (json: any): any

Inherited from: JSONSupportMixin

Creates a new instance of this class and initializes it with values from a JSON object generated from an ArcGIS product. The object passed into the input json parameter often comes from a response to a query operation in the REST API or a toJSON() method from another ArcGIS product. See the Using fromJSON() topic in the Guide for details and examples of when and how to use this function.

Parameters

Parameter	Type	Description	Required
json	`any`	A JSON representation of the instance in the ArcGIS format. See the ArcGIS REST API documentation for examples of the structure of various input JSON objects.

Returns: any
Returns a new instance of this class.

toJSON

inherited Method

Signature: toJSON (): any

Inherited from: JSONSupportMixin

Converts an instance of this class to its ArcGIS portal JSON representation. See the Using fromJSON() guide topic for more information.

Returns: any
The ArcGIS portal JSON representation of an instance of this class.