// Each object in this array is autocast as
// an instance of esri/layers/support/Field
var fields = [
  {
    name: "ObjectID",
    alias: "ObjectID",
    type: "oid"
  }, {
    name: "title",
    alias: "title",
    type: "string"
  }, {
    name: "type",
    alias: "type",
    type: "string"
  }, {
    name: "mag",
    alias: "Magnitude",
    type: "double"
}];

// add the array of fields to a feature layer
// created from client-side graphics
featureLayer.set({
  fields: fields,
  objectIdField: "ObjectID"
});

Property Overview

Property Details

aliasString

The alias name for the field.

declaredClassStringreadonly

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

domainDomain

The domain associated with the field.

editableBoolean

Indicates whether the field is editable.

lengthNumber

The field length.

nameString

The name of the field.

nullableBoolean

Indicates if the field can accept null values. Requires ArcGIS Server version 10.1 or greater.

typeString

The data type of the field.

Possible Values: small-integer | integer | single | double | string | date | oid | geometry | blob | raster | guid | global-id | xml

Method Overview

Method Details

fromJSON(json){*}static

Creates a new instance of this class and initializes it with values from a JSON object generated from a product in the ArcGIS platform. 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.

toJSON(){Object}

Converts an instance of this class to its ArcGIS Portal JSON representation. See the Using fromJSON() topic in the Guide for more information.

Returns:

Type	Description
Object	The ArcGIS Portal JSON representation of an instance of this class.