Predicates

Predicates allow you to control form behavior based on other field values. You can use them to make fields required or disabled dynamically.

This is useful when a field should only be relevant under certain conditions (e.g. when another field is set to a specific value).

Supported Fields

You can apply predicates to:

• required
• disabled

Formats

✅ 1. Boolean

Use a static value (true or false):

"required": true

✅ 2. Simple Predicate

Require a field based on the value of another field:

"required": {
  "key": "language",
  "equals": "java"
}

✅ 3. Predicate Group

Combine multiple conditions using all or any:

"required": {
  "operation": "all",
  "comparators": [
    { "key": "language", "equals": "java" },
    { "key": "includeCI", "equals": true }
  ]
}

{
  "key": "template",
  "type": "select",
  "label": "Service Template",
  "required": {
    "key": "language",
    "equals": "java"
  },
  "dataSource": {
    "url": "https://data.platformworks.co/api/github/templates?language={language}"
  }
}

This makes the template field required only when the selected language is java.

Notes

• Field keys in predicates must match existing field keys in the same form.
• Predicates support: equals, notEquals, in, notIn, and empty.