Widget option schema

Widget instances allow users to uniquely configure each widget they add to a page. Use the option schema to define the parameters for your widget.

Storing instance options

When developing a widget, you can edit the option schema to create parameters for your widget, or you can create a table to store instance options. If you edit the existing option schema, any instance options defined are stored in JSON format in the Additional options, JSON format field in the sp_instance table. The following field types are available:

String
Boolean
Integer
Reference
Choice
Field_list (depends on table)
Field_name (depends on table)
Glide_list

To use other field types not supported in the option schema, create an extension table to store your custom widget option schema. Using a table enables you to:

Add any ServiceNow field type, including fields with advanced customization, to the option schema.
Define a complex option schema.
Search and filter instance options.

Note: While storing options in a table enables you to define more complex options, this method is more difficult to maintain than editing the option schema. To avoid creating unnecessary tables and adding additional server calls to your widget, edit the existing option schema when possible. Store options in a table only when complex or searchable options are required.

Using options in a widget

Access options in the widget from both the client script and the server script using the options global variable. You can access to any option value in your widget client script or server script using options.optionName.

Client script

function() {
  /* widget controller */
  var c = this;
    console.log(c.options.text_color) //Outputs the text_color option for this instance
}

Server script

(function() {
     $sp.log(options.text_color) //Logs the value of the text_color option to the browser console.
})();

Defining default options

Before an option value is set on an instance, it appears as an undefined value when you access that option variable. Use the widget server script to specify default values for your options.

(function() {
  options.text_color=options.text_color||"blue";
  options.maximum_entry_count=options.maximum_entry_count||5;
})

Edit the widget option schema

Widget instances allow users to uniquely configure each widget they add to a page. Edit the option schema to define basic parameters for your widget.

Before you begin

Role required: admin or sp_admin

Procedure

Navigate to Service Portal > Service Portal Configuration > Widget Editor.
Select the widget you want to configure the option schema for.
Click the menu icon () and select Edit option schema.
This option only appears for users that have the right to edit the widget.
Click + to add a widget option.
Define a label, name, type, hint and form section. More fields appear depending on the type you select.

Adding flexible widget options allows you to create more reusable widgets. You can add default values to help users understand each widget option. If you do not select a form section, the default is set to Other options.
Click Save.
The option schema you defined is stored in JSON format in the Option schema field in the sp_widget table. Based on this option schema, each instance of the widget can use individually defined instance options.
Test the option schema by adding the widget to a page in the Service Portal Designer.
1. Navigate to Service Portal > Service Portal Configuration > Service Portal Designer.
2. Add the widget to a page and click the edit icon on the widget instance to view the instance options.
3. Configure the widget instance options.
4. View the configuration by navigating to the instance record in the sp_instance table.
  The instance options are stored in JSON format in the Additional options, JSON format field.

Store instance options in a table

Create a table to store widget instance options instead of editing the existing option schema. When using a table as your widget option schema, you can define custom fields using any ServiceNow field type, add filters to fields, and search or query instance options.

Before you begin

Role required: admin or sp_admin

About this task

To define a custom option schema, add fields to an sp_instance extension table, then set your widget to use the extension table as a data source. Using an extension table enables you to:

Add any ServiceNow field type, including fields with advanced customization, to the option schema.
Define complex widget options.
Search and filter instance options.

Procedure

Create a table that extends an sp_instance table to store your custom option schema.

Navigate to System Definition > Tables.
Click New.
Define a label and name.

In the Extends table field, select an sp_instance table that provides the necessary fields.


Instance table	Description
Instance [sp_instance]	Includes base instance fields.
Instance with Table [sp_instance_table]	Includes sp_instance fields and fields to display table data such as Table and Filter.

Save the form.

Define custom fields in the extension table.
You can define any field type to use in your option schema by adding new columns in the Columns list.
Update your widget to use the extension table as a data source.
1. Navigate to Service Portal > Widgets.
2. Open the widget you would like to create custom options for.
3. In the Data table field, select your sp_instance extension table.
Configure the extension table form to display the desired fields. Fields configured on the form are available as instance options.
1. Navigate to the extension table form: <yourInstance>/<your_extenstion_table>.do.
2. Right-click the header menu and select Configure > Form Layout.
3. Add the fields to the form.
4. Click Save.
Configure the widget to display the desired fields as instance options.
1. Navigate to Service Portal > Widgets.
2. Open the widget that has the extension table set as the data source.
3. Use the Fields slushbucket to select fields to display as instance options.
4. Save the form.

What to do next

Test the option schema by adding the widget to a page in the Service Portal Designer. Click the edit icon on the widget instance to view the instance options. After configuring the widget instance options, view the configuration by navigating to the instance record in the sp_instance extension table.

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