6.7. RadioGroupView

RadioGroup widget

This is radio group view used for selecting a single item among a list of options. It is identified by type radio_group in the JSON.

All JSON attributes are represented as a String literals

Field attributes

Field Attribute	Usage	Required
name	Name of the field	yes
type	Type of the field	yes
properties	View attributes	yes
options	Options for the field	yes
meta_data / metadata	Extra data passed with the result of this field	no
validation	List of validations to perform on the field	no
required_status	Status to indicate whether this field is required or not	no
subjects / binding_fields		no
calculations / dependent_calculations / calculation_fields	Calculations depending on this field	no

Supported view attributes

Mostly matching the attributes on the XML but using snake case.

View Attribute	Usage	Required
text	Label of the the radio group	yes

Supported options attributes

View Attribute	Usage	Required
name	Name of the option item	yes
text	Label of the option	yes
metadata / meta_data	Extra data to pass with the result	no

Example JSON

{
  "name": "wiki_contribution",
  "type": "radio_group",
  "properties": {
    "text": "Have you ever contributed to or written a page in the Wiki?"
  },
  "options": [
    {
      "name": "yes",
      "text": "Yes"
    },
    {
      "name": "no",
      "text": "No"
    },
    {
      "name": "dont_know",
      "text": "Dont know"
    }
  ],
  "validation": [
    {
      "condition": "value != null && !value.containsKey('dont_know')",
      "message": "Don't know is not an option"
    }
  ],
  "required_status": "yes:Wiki contribution field is required.",
  "subjects": "email_subscription:map"
}

Field Validation

Validations are executed by Rules Engine in the order they are added on the list. To access the value of the field in the rules file, you can use a special neat form keyword called value alternatively you can use the field name. A field becomes invalid when any of the listed validation fails.

A validation has a condition and error message to be displayed on the view when the condition evaluates to false.

Field Value

This field stores value of a map of the field_name -> (selected_item_name-> selected_item_text)

Required Status

To make field required add required_status attribute with value Yes:error message or true:Your error message. Use no/false to negate the status

Rules

Add field:data_type to comma separated string list of the subjects / binding_fields attribute. as shown in the sample JSON above. For calculations add field names to the JSON array of dependent_calculations / calculation / calculation_fields attribute to watch for changes in the value of the view.