FeatureFormViewModel

AMD: require(["esri/widgets/FeatureForm/FeatureFormViewModel"], (FeatureFormVM) => { /* code goes here */ });
ESM: import FeatureFormVM from "@arcgis/core/widgets/FeatureForm/FeatureFormViewModel";
Class: esri/widgets/FeatureForm/FeatureFormViewModel
Inheritance: FeatureFormViewModel Accessor
Since: ArcGIS API for JavaScript 4.9

Provides the logic for the FeatureForm widget.

Known Limitations

The FeatureForm widget is not yet at full parity with the functionality provided in the 3.x AttributeInspector widget. For example, there is currently no support for editing attachments or related feature attributes. Although, editing attachments is possible using the Editor widget.

See also
Example
let featureForm = new FeatureForm({
  viewModel: { // Autocasts as new FeatureFormViewModel()
    layer: featureLayer   // Associates the FeatureForm to the layer
  },
  container: "formDiv"
});

Constructors

new FeatureFormViewModel(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.
Show inherited properties Hide inherited properties
Name Type Summary Class
String

The name of the class.

more details
Accessor
Graphic

The associated feature containing the editable attributes.

more details
FeatureFormViewModel
FormTemplate

The associated template used for the form.

more details
FeatureFormViewModel
InputField[]|InputFieldGroup[]

The input fields and/or grouped field rendered by the FeatureForm widget.

more details
FeatureFormViewModel
FeatureLayer|SceneLayer

Layer containing the editable feature attributes.

more details
FeatureFormViewModel
String

The widget's state.

more details
FeatureFormViewModel
Boolean

When true, this form can be submitted without introducing data validation issues.

more details
FeatureFormViewModel
Boolean

Indicates whether all input fields are valid.

more details
FeatureFormViewModel

Property Details

declaredClass Stringreadonly inherited

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

feature Graphic

The associated feature containing the editable attributes. A common way to access this is via the MapView or SceneView's hitTest() method.

Example
// Check if a user clicked on an incident feature.
view.on("click", function(event) {
  view.hitTest(event).then(function(response) {
    // Display the attributes of selected incident feature in the form
    if (response.results[0].graphic && response.results[0].graphic.layer.id == "incidentsLayer") {
       formVM.feature = result.results[0].graphic
    }
  });
});
formTemplate FormTemplateautocast
Since: ArcGIS API for JavaScript 4.16

The associated template used for the form.

The formTemplate is where you configure how the form should display and set any associated properties for the form, e.g. title, description, field elements, etc.

See also
inputFields InputField[]|InputFieldGroup[]readonly

The input fields and/or grouped field rendered by the FeatureForm widget.

Layer containing the editable feature attributes. If this layer is not specified, it is the same as the graphic's layer.

state Stringreadonly

The widget's state. Possible values are in the table below.

Value Description
ready Dependencies are met and has valid property values.
disabled Dependencies are missing and cannot provide valid inputs.

Possible Values:"ready"|"disabled"

Default Value:disabled
submittable Boolean

When true, this form can be submitted without introducing data validation issues.

valid Boolean

Indicates whether all input fields are valid.

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

Emits an event on the instance.

more details
FeatureFormViewModel
InputField

Convenience method to find input fields.

more details
FeatureFormViewModel
Object

Returns all of the field values, regardless of whether or not they were updated.

more details
FeatureFormViewModel
Boolean

Indicates whether there is an event listener on the instance that matches the provided event name.

more details
FeatureFormViewModel
Boolean

Returns true if a named group of handles exist.

more details
Accessor

Updates the geometry on _featureClone and triggers re-evaluation of expressions that depend on the feature's geometry

more details
FeatureFormViewModel
Object

Registers an event handler on the instance.

more details
FeatureFormViewModel

Removes a group of handles owned by the object.

more details
Accessor

Used to set the updated field value.

more details
FeatureFormViewModel

Fires the submit event.

more details
FeatureFormViewModel
Object[]FeatureFormViewModel

Method Details

addHandles(handleOrHandles, groupKey)inherited
Since: ArcGIS API for JavaScript 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 }
);

// 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.

emit(type, event){Boolean}

Emits an event on the instance. This method should only be used when creating subclasses of this class.

Parameters
type String

The name of the event.

event Object
optional

The event payload.

Returns
Type Description
Boolean true if a listener was notified
findField(fieldName){InputField}

Convenience method to find input fields.

Parameter
fieldName String

The input field to find.

Returns
Type Description
InputField Returns an instance of the InputField.
getValues(){Object}

Returns all of the field values, regardless of whether or not they were updated.

Returns
Type Description
Object An object of key-value pairs of field names with their values.
See also
Example
function updateFeature() {
  // Get the updated field values
  const attributes = formVM.getValues();
  // Call applyEdits on the feature layer
  layer.applyEdits({
    // Pass in the updated field values
    updateFeatures: [{ attributes }]
  });
}
hasEventListener(type){Boolean}

Indicates whether there is an event listener on the instance that matches the provided event name.

Parameter
type String

The name of the event.

Returns
Type Description
Boolean Returns true if the class supports the input event.
hasHandles(groupKey){Boolean}inherited
Since: ArcGIS API for JavaScript 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");
}
notifyFeatureGeometryChanged()
Since: ArcGIS API for JavaScript 4.25

Updates the geometry on _featureClone and triggers re-evaluation of expressions that depend on the feature's geometry

on(type, listener){Object}

Registers an event handler on the instance. Call this method to hook an event with a listener.

Parameters

An event or an array of events to listen for.

listener Function

The function to call when the event fires.

Returns
Type Description
Object Returns an event handler with a remove() method that should be called to stop listening for the event(s).
Property Type Description
remove Function When called, removes the listener from the event.
Example
view.on("click", function(event){
  // event is the event handle returned after the event fires.
  console.log(event.mapPoint);
});
removeHandles(groupKey)inherited
Since: ArcGIS API for JavaScript 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");
setValue(fieldName, value)
Since: ArcGIS API for JavaScript 4.21

Used to set the updated field value.

This renders the new value within the form but does not update the underlying input feature's attributes.

Parameters
fieldName String

The target field to update.

The value to set on the target field.

submit()

Fires the submit event.

Example
// Listen for when 'submit' is called.
// Once it is fired, update the feature.
formVM.on("submit", updateFeature);

// When the DOM's button (btnUpdate) is clicked,
// Update attributes of the selected feature.
document.getElementById("btnUpdate").onclick = function() {
  // Fires feature form's submit event.
  formVM.submit();
}
validateContingencyConstraints(values, options){Object[]}
Since: ArcGIS API for JavaScript 4.23
Parameters
values String

A hash map of the form fields and their values.

options Object
optional

An object specifying additional options on what should be considered an error.

Specification
includeIncompleteViolations Boolean
optional

If true, return contingency violations for field groups that are invalid because values have not yet been specified for all their fields. If false, any of these violations are ignored.

Returns
Type Description
Object[] An array of objects, each representing a violation of a field group's contingent value rules.

Event Overview

Name Type Summary Class
{valid: String[],invalid: String[],values: Object}

Fires when the submit() method is called.

more details
FeatureFormViewModel
{layer: FeatureLayer,feature: Graphic,fieldName: String,value: Number,String,null,valid: Boolean}

Fires when a field value is updated.

more details
FeatureFormViewModel

Event Details

submit

Fires when the submit() method is called. Call FeatureLayer.applyEdits() method to update a feature's attributes.

Properties
valid String[]

The valid field names.

invalid String[]

The invalid field names.

values Object

An object of key-value pairs of field names with all of their values, regardless of whether or not they were updated.

See also
Example
// Listen to the feature form's submit event.
featureForm.on("submit", function(){
  if (editFeature) {
    // Grab updated attributes from the form.
    const updated = featureForm.getValues();

    // Loop through updated attributes and assign
    // the updated values to feature attributes.
    Object.keys(updated).forEach(function(name) {
      editFeature.attributes[name] = updated[name];
    });

    // Setup the applyEdits parameter with updates.
    const edits = {
      updateFeatures: [editFeature]
    };
    applyEdits(edits);
  }
});
value-change

Fires when a field value is updated.

Properties
layer FeatureLayer

The associated feature layer.

feature Graphic

The associated feature.

fieldName String

The updated field.

The updated field value.

valid Boolean

When true, the value conforms to the field's definition.

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