RelationshipQuery | API Reference | ArcGIS Maps SDK for JavaScript 4.30

This class defines parameters for executing queries for related records from a layer. Once a RelationshipQuery object's properties are defined, it can then be passed into the query.executeRelationshipQuery() and FeatureLayer.queryRelatedFeatures() methods, which will return FeatureSets grouped by source layer/table objectIds.

See also

Constructors

RelationshipQuery Constructor new RelationshipQuery(properties)

Parameter

properties Object

optional

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

Property Overview

Any properties can be set, retrieved or listened to. See the Working with Properties topic.

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Type	Summary	Class
Boolean	Indicates if the service should cache the relationship query results.	RelationshipQuery
String	The name of the class.	Accessor
String	Specify the geodatabase version to query.	RelationshipQuery
Number	Specify the number of decimal places for the geometries returned by the query operation.	RelationshipQuery
Date	The historic moment to query.	RelationshipQuery
Number	The maximum allowable offset used for generalizing geometries returned by the query operation.	RelationshipQuery
Number	The number of features to retrieve.	RelationshipQuery
Number []\|String []	An array of objectIds for the features in the layer/table being queried.	RelationshipQuery
String []	One or more field names used to order the query results.	RelationshipQuery
String []	Attribute fields to include in the FeatureSet.	RelationshipQuery
SpatialReference	The spatial reference for the returned geometry.	RelationshipQuery
Number	The ID of the relationship to be queried.	RelationshipQuery
Boolean	If `true`, each feature in the FeatureSet includes the geometry.	RelationshipQuery
Boolean	If `true`, and returnGeometry is `true`, then m-values are included in the geometry.	RelationshipQuery
Boolean	If `true`, and returnGeometry is `true`, then z-values are included in the geometry.	RelationshipQuery
Number	The zero-based index indicating where to begin retrieving features.	RelationshipQuery
String	The definition expression to be applied to the related table or layer.	RelationshipQuery

Property Details

cacheHint Property cacheHint Boolean Since: ArcGIS Maps SDK for JavaScript 4.24 RelationshipQuery since 4.20, cacheHint added at 4.24.

Indicates if the service should cache the relationship query results. It only applies if the layer's capabilities.queryRelated.supportsCacheHint is set to true. Use only for queries that have the same parameters every time the app is used. Some examples of cacheable queries:

Queries based on preset input, for example, a drop-down list of US states.
Queries based on preset extents, for example bookmarks, in web maps.

Default Value:undefined

declaredClass Inherited Property declaredClass Stringreadonly Inherited from Accessor

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

gdbVersion Property gdbVersion String

Specify the geodatabase version to query.

geometryPrecision Property geometryPrecision Number

Specify the number of decimal places for the geometries returned by the query operation.

historicMoment Property historicMoment Date

The historic moment to query. This parameter applies only if the supportsHistoricMoment on FeatureLayer property of the layer is set to true.

maxAllowableOffset Property maxAllowableOffset Number

The maximum allowable offset used for generalizing geometries returned by the query operation. The offset is in the units of outSpatialReference. If outSpatialReference is not defined, the spatialReference of the view is used.

num Property num Number

The number of features to retrieve. This option should be used in conjunction with the start property. Use this to implement paging (i.e. to retrieve "pages" of results when querying).

If not provided, but an instance of Query has a start property, then the default value of num is 10. If neither num nor start properties are provided, then the default value of num is equal to the maxRecordCount of the service, which can be found at the REST endpoint of the FeatureLayer.

objectIds Property objectIds Number[] |String[]

An array of objectIds for the features in the layer/table being queried.

orderByFields Property orderByFields String[]

One or more field names used to order the query results. Specify ASC (ascending) or DESC (descending) after the field name to control the order. The default order is ASC.

Known Limitations

If querying a MapImageLayer, then supportsAdvancedQueries must be true on the service.
For FeatureLayer, FeatureLayer.capabilities.queryRelated.supportsOrderBy must be true.

See also

FeatureLayer.capabilities

Example

query.orderByFields = ["STATE_NAME DESC"];

outFields Property outFields String[]

Attribute fields to include in the FeatureSet. Fields must exist in the map layer. You must list actual field names rather than the alias names. You are, however, able to use the alias names when you display the results.

When specifying the output fields, you should limit the fields to only those you expect to use in the query or the results. The fewer fields you include, the faster the response will be.

Each query must have access to the Shape and ObjectId fields for a layer. However, your list of fields does not need to include these two fields.

Example

query.outFields = [ "NAME", "STATE_ABBR", "POP04" ];

outSpatialReference Property outSpatialReference SpatialReferenceautocast

The spatial reference for the returned geometry. If outSpatialReference is not defined, the spatialReference of the view is used.

relationshipId Property relationshipId Number

The ID of the relationship to be queried. The ids for the relationships the table or layer participates in are listed in the ArcGIS Services directory. The ID of the relationship to be queried. The relationships that this layer/table participates in are included in the Feature Service Layer resource response. Records in tables/layers corresponding to the related table/layer of the relationship are queried.

returnGeometry Property returnGeometry Boolean

If true, each feature in the FeatureSet includes the geometry. Set to false (default) if you do not plan to include highlighted features on a map since the geometry makes up a significant portion of the response.

Default Value:false

returnM Property returnM Boolean

If true, and returnGeometry is true, then m-values are included in the geometry.

returnZ Property returnZ Boolean

If true, and returnGeometry is true, then z-values are included in the geometry.

start Property start Number

The zero-based index indicating where to begin retrieving features. This property should be used in conjunction with num. Use this to implement paging and retrieve "pages" of results when querying. Features are sorted ascending by object ID by default.

where Property where String

The definition expression to be applied to the related table or layer. Only records in the list of objectIds that satisfy the definition expression are queried for related records.

Method Overview

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Return Type	Summary	Class
	Adds one or more handles which are to be tied to the lifecycle of the object.	Accessor
RelationshipQuery	Creates a deep clone of RelationshipQuery object.	RelationshipQuery
*	Creates a new instance of this class and initializes it with values from a JSON object generated from an ArcGIS product.	RelationshipQuery
Boolean	Returns true if a named group of handles exist.	Accessor
	Removes a group of handles owned by the object.	Accessor
Object	Converts an instance of this class to its ArcGIS portal JSON representation.	RelationshipQuery

Method Details

addHandles Inherited Method addHandles(handleOrHandles, groupKey) Inherited from Accessor Since: ArcGIS Maps SDK for JavaScript 4.25 Accessor since 4.0, addHandles added at 4.25.

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 }
);

this.addHandles(handle);

// Destroy the object
this.destroy();

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.

clone Method clone(){RelationshipQuery}

Creates a deep clone of RelationshipQuery object.

Returns

Type	Description
RelationshipQuery	A new instance of a RelationshipQuery object equal to the object used to call `.clone()`.

fromJSON Method fromJSON(json){*}static

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.

Parameter

json Object

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

Type	Description
*	Returns a new instance of this class.

hasHandles Inherited Method hasHandles(groupKey){Boolean} Inherited from Accessor Since: ArcGIS Maps SDK for JavaScript 4.25 Accessor since 4.0, hasHandles added at 4.25.

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 Inherited Method removeHandles(groupKey) Inherited from Accessor Since: ArcGIS Maps SDK for JavaScript 4.25 Accessor since 4.0, removeHandles added at 4.25.

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");

toJSON Method toJSON(){Object}

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

Returns

Type	Description
Object	The ArcGIS portal JSON representation of an instance of this class.