FeatureFormViewModel
require(["esri/widgets/FeatureForm/FeatureFormViewModel"], function(FeatureFormVM) { /* code goes here */ });
esri/widgets/FeatureForm/FeatureFormViewModel
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.
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 Objectoptional
See the properties for a list of all the properties that may be passed into the constructor.
Property Overview
Name | Type | Summary | Class | |
---|---|---|---|---|
String | The name of the class. more details | more details | Accessor | |
Graphic | The associated feature containing the editable attributes. more details | more details | FeatureFormViewModel | |
FieldConfig[] | Array of field configuration objects. more details | more details | FeatureFormViewModel | |
InputField[] | The input fields to be rendered by the FeatureForm widget. more details | more details | FeatureFormViewModel | |
FeatureLayer | Layer containing the editable feature attributes. more details | more details | FeatureFormViewModel | |
String | The widget's state. more details | more details | FeatureFormViewModel |
Property Details
- 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 } }); });
- fieldConfig
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
, andobjectID
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" } }]
- inputFieldreadonly
The input fields to be rendered by the FeatureForm widget.
- layerFeatureLayer
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.
Value Description ready Dependencies are met and has valid property values. disabled Dependencies are missing and cannot provide valid inputs. - Default Value:disabled
Method Overview
Name | Return Type | Summary | Class | |
---|---|---|---|---|
Emits an event on the instance. more details | more details | FeatureFormViewModel | ||
Object | Returns all of the field values, regardless of whether or not they were updated. more details | more details | FeatureFormViewModel | |
Boolean | Indicates whether there is an event listener on the instance that matches the provided event name. more details | more details | FeatureFormViewModel | |
Object | Registers an event handler on the instance. more details | more details | FeatureFormViewModel | |
Fires the submit event. more details | more details | FeatureFormViewModel |
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 StringThe name of the event.
event ObjectThe event payload.
- 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. 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 StringThe name of the event.
Returns:Type Description Boolean Returns 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 StringThe name of event to listen for.
listener FunctionThe function to call when the event is fired.
Returns:Type Description Object Returns an event handler with a remove()
method that can be called to stop listening for the event.Property Type Description remove Function When 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
Name | Type | Summary | Class | |
---|---|---|---|---|
{valid: String[],invalid: String[],values: Object} | Fires when the submit() method is called. more details | more details | FeatureFormViewModel | |
{layer: FeatureLayer,feature: Graphic,fieldName: String,value: Number,String,null,valid: Boolean} | Fires when a field value is updated. more details | 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 ObjectAn 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 GraphicThe associated feature.
fieldName StringThe updated field.
The updated field value.
valid BooleanWhen true, the value conforms to the field's definition.