RelationshipElement

// 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
});

Property Overview

Property Details

declaredClass Stringreadonly inherited

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

description String inherited

The element's description providing the purpose behind it.

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 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 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 String inherited

A string value containing the field alias. This is not to Arcade expressions as the title is used instead.

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 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 String

Indicates the type of form element. RelationshipElement is of type, relationship.

For RelationshipElement the type is always "relationship".

visibilityExpression String inherited

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

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 i.e. to make sure that such fields either have default values or are made visible to users so that they can provide a value before submitting the form.

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

See also

• ExpressionInfo

• Sample - Update Feature Attributes

• Form Constraint Arcade Profile

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

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 }
);

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(){RelationshipElement}

Creates a deep clone of the RelationshipElement class.

Returns

Type	Description
RelationshipElement	A deep clone of the RelationshipElement instance.

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(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");

toJSON(){Object}inherited

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.