RelationshipElement | API Reference | ArcGIS Maps SDK for JavaScript 4.30

A RelationshipElement form element defines how a relationship between FeatureLayer or MapImageLayer and tables participates in the FeatureForm. When this element is present in the form, the option to add or edit related records is provided per the underlying service's editing permissions and whether it allows relationship editing.

Known Limitations when editing related data

Support is limited to 1:1 and 1:M cardinality.
Support is limited to feature-to-table and feature-to-feature relationships, ie. origin-to-destination. The origin's entry point must be a feature with geometry.
Relationship editing is only supported using ArcGIS Online and ArcGIS Enterprise version 11.2 or higher feature services.
The layer and associated relationship elements must be editable in order for the relationship to display.
Data containing related records will display the relationship in the associated form as long as there is a relationship element configured in the layer or form's formTemplate. This can be accomplished via the Map Viewer's authoring experience, Field Maps Designer, or programmatically using the API.
The related layer or table must also be added to the map to be able to configure relationship elements.

See also

Example

// Create the relationship element
const relationshipElement = new RelationshipElement({
  description: "Past and present building owners",
  displayCount: 5,
  label: "Building owners",
  orderByFields: [{ //autocastable to RelatedRecordsInfoFieldOrder
    field: "owner_name",
    order: "desc"
  }],
  relationshipId: 0
});

Constructors

RelationshipElement Constructor new RelationshipElement(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
String	The name of the class.	Accessor
String	The element's description providing the purpose behind it.	Element
Number	A numeric value indicating the maximum number of related features to display in the list of related records.	RelationshipElement
String	A string value indicating how to display related records within the relationship content.	RelationshipElement
String	A reference to the name of an Arcade expression defined in the expressionInfos of the FormTemplate.	RelationshipElement
String	A string value containing the field alias.	Element
RelatedRecordsInfoFieldOrder []	An array of RelatedRecordsInfoFieldOrder objects indicating the field display order for the related records and whether they should be sorted in ascending `asc` or descending `desc` order.	RelationshipElement
Number	The numeric id value for the defined relationship.	RelationshipElement
String	Indicates the type of form element.	RelationshipElement
String	A reference to the name of an Arcade expression defined in the expressionInfos of the FormTemplate.	Element

Property Details

declaredClass Inherited Property declaredClass Stringreadonly Inherited from Accessor

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

description Inherited Property description String Inherited from Element

The element's description providing the purpose behind it.

displayCount Property displayCount Number

A numeric value indicating the maximum number of related features to display in the list of related records. If no value is specified, the Show all button will be available to display all related records and the associated FeatureForm/RelationshipInput defaults to 3. If the total amount of features is greater than the displayCount, a Show all button displays.

Default Value:3

displayType Property displayType String

A string value indicating how to display related records within the relationship content. Currently, list is the only supported value.

Value	Description
list	Shows a list of related records from the specified relationship.

For RelationshipElement the displayType is always "list".

Default Value:list

editableExpression Property editableExpression String

A reference to the name of an Arcade expression defined in the expressionInfos of the FormTemplate. The expression must follow the specification defined in the Form Constraint Profile. Expressions may reference field values using the $feature global input and must return either true or false.

When this expression evaluates to true, it is possible to edit the field value, and vice-versa if false. If the referenced related table is not editable, the editable expression is ignored and the element is not editable.

The referenced expression must be defined in the form template's expressionInfos. It cannot be set inline within the element object.

See also

Form Constraint Arcade Profile

label Inherited Property label String Inherited from Element

A string value containing the field alias. This should not be used for referencing fields in Arcade expressions. Rather, the service fieldName should be referenced.

orderByFields Property orderByFields RelatedRecordsInfoFieldOrder[]autocast

An array of RelatedRecordsInfoFieldOrder objects indicating the field display order for the related records and whether they should be sorted in ascending asc or descending desc order.

relationshipId Property relationshipId Number

The numeric id value for the defined relationship. This value can be found on the service itself or on the service's relationships resource if supportsRelationshipResource is true.

type Property type Stringreadonly

Indicates the type of form element.

For RelationshipElement the type is always "relationship".

visibilityExpression Inherited Property visibilityExpression String Inherited from Element

A reference to the name of an Arcade expression defined in the expressionInfos of the FormTemplate.

When this expression evaluates to true, the element is displayed. When the expression evaluates to false the element is not displayed. If no expression is provided, the element is always displayed. Care must be taken when defining a visibility expression for a non-nullable field as to make certain the specified field has either 1) a default value, or 2) is made visible to the end user to enter a value before submitting the form.

The expression must follow the specification defined in the Form Calculation Profile. This expression references field values within an individual feature or in other layers and must return either a date, number, or string value.
The referenced expression must be defined in the form template's expressionInfos. It cannot be set inline within the element object.
Field and Group elements must be visible if the field or one of the grouped fields is required.

See also

Example

// Expression created within ExpressionInfos and is referenced in element
const expression = new ExpressionInfo({
  name: "alwaysHidden",
  expression: "false"
});

// Reference an already-defined visibilityExpression set within the ExpressionInfos
const fieldElement = new FieldElement({
  type: "field",
  fieldName: "inspemail",
  label: "Email address",
  visibilityExpression: "alwaysHidden"
});

formTemplate.expressionInfos = [ expression ];
formTemplate.elements = [ fieldElement ];

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
RelationshipElement	Creates a deep clone of the RelationshipElement class.	RelationshipElement
*	Creates a new instance of this class and initializes it with values from a JSON object generated from an ArcGIS product.	Element
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.	Element

Method Details

addHandles Inherited Method addHandles(handleOrHandles, groupKey) Inherited from Accessor

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(){RelationshipElement}

Creates a deep clone of the RelationshipElement class.

Returns

Type	Description
RelationshipElement	A deep clone of the RelationshipElement instance.

fromJSON Inherited 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

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

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 Inherited Method toJSON(){Object} Inherited from Element

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.