FeatureFormViewModel

require(["esri/widgets/FeatureForm/FeatureFormViewModel"], function(FeatureFormVM) { /* code goes here */ });
Class: esri/widgets/FeatureForm/FeatureFormViewModel
Inheritance: FeatureFormViewModel Accessor
Since: ArcGIS API for JavaScript 4.9
beta

Provides the logic for the FeatureForm widget.

Known Limitations

The FeatureForm widget is currently in its beta release. It should be noted that it is not yet at full parity with the functionality provided in the 3.x AttributeInspector widget and is subject to change. For example, there is currently no support for editing attachments or related feature attributes.

See also:
Example:
var 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.
NameTypeSummaryClass
String

The name of the class.

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Graphic

The associated feature containing the editable attributes.

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FieldConfig[]

Array of field configuration objects.

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InputField[]

The input fields to be rendered by the FeatureForm widget.

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FeatureLayer

Layer containing the editable feature attributes.

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String

The widget's state.

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Property Details

declaredClassStringreadonly inherited
Since: ArcGIS API for JavaScript 4.7

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

featureGraphic

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
    }
  });
});
fieldConfigFieldConfig[]

Array of field configuration objects. This is where you specify what fields to display and how you wish to display them.

When not set, all fields except for editor, globalID, and objectID fields will be included, otherwise it is up to the developer to set the right field(s) to override and display.

Example:
fieldConfig: [
  {
    name: "Incident_desc",
    options: {
      label: "Description"
    }
  },
  {
    name: "Incident_Address",
    options: {
      label: "Contact"
    }
  }]
inputFieldInputField[]readonly

The input fields to be 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.

stateStringreadonly

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

ValueDescription
readyDependencies are met and has valid property values.
disabledDependencies are missing and cannot provide valid inputs.
Default Value:disabled

Method Overview

NameReturn TypeSummaryClass

Emits an event on the instance.

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Object

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

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Boolean

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

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Object

Registers an event handler on the instance.

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Fires the submit event.

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Method Details

emit(type, event)

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

The event payload.

getValues(){Object}

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

Returns:
TypeDescription
ObjectAn 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 featurelayer
  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:
TypeDescription
BooleanReturns true if the class supports the input event.
on(type, listener){Object}

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

Parameters:
type String

The name of event to listen for.

listener Function

The function to call when the event is fired.

Returns:
TypeDescription
ObjectReturns an event handler with a remove() method that can be called to stop listening for the event.
PropertyTypeDescription
removeFunctionWhen called, removes the listener from the event.
See also:
Example:
view.on("click", function(event){
  // event is the event handle returned after the event fires.
  console.log(event.mapPoint);
});
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();
}

Event Overview

NameTypeSummaryClass
{valid: String[],invalid: String[],values: Object}

Fires when the submit() method is called.

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

Fires when a field value is updated.

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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:

The associated feature layer.

feature Graphic

The associated feature.

fieldName String

The updated field.

value Number|String|null

The updated field value.

valid Boolean

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

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