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Templating syntax

Templated properties configuration allows for dynamic content creation within forms using a templating language called feelers.

Feelers syntax​

Variables/inserts​

To insert a variable, use double curly braces {{variable}}, and the value of this variable will be inserted. You can use any valid FEEL expression within these double braces.

Hello {{username}}, you are {{if isAdmin then "an admin" else "a user"}}.

Iterating through arrays​

Iterate through arrays using the loop tags. Within the loop, reference each array element with {{this}}, or if your array elements are objects, via their properties. To access data outside the scope of the individual items, use the {{parent}} accessor.

Data

{
  "currency": "$",
  "items": [
    {
      "name": "bananas",
      "price": 2.5
    },
    {
      "name": "mangos",
      "price": 4
    },
    {
      "name": "strawberries",
      "price": 3
    }
  ]
}

Template

{{#loop items}}
Item name: {{name}}
Item price: {{parent.currency}}{{price}}
{{/loop}}

Conditional sections​

Conditionally render a section of your template using the if tags. This is a quick way to write out large blocks you may or may not want evaluated based on a condition:

{{#if user.isCook}}
Ingredients list:
{{#loop ingredients}}
* {{this}}
{{/loop}}
{{/if}}

Additional details​

Nest loops​

If you have an array of users, each with an array of purchases, you may loop over both in a nested manner:

Data

{
  "users": [
    {
      "name": "jane1995",
      "purchases": ["mango", "strawberry"]
    },
    {
      "name": "rob1992",
      "purchases": ["pineapple", "guava"]
    }
  ]
}

Template

{{#loop users}}
The user '{{name}}' purchased:
{{#loop purchases}}
* {{this}}
{{/loop}}
{{/loop}}

In this situation, you may need to use the parent accessor several times to access data outside the scope.

More on the parent and this accessors​

If the data you are using somehow already makes use of those keywords, there is an alternative syntax which surrounds it with an underscore: _this_ and _parent_.

Data

{
  "root": "nodes",
  "nodes": [
    {
      "id": "021321321",
      "parent": "228321321"
    },
    {
      "id": "021321321",
      "parent": "228321321"
    }
  ]
}

Template

Listing out all node paths:
{{#loop nodes}}
* http://www.myNodeWebsite/{{_parent_.root}}/{{id}}
{{/loop}}

In the example above, if you are not surrounding the parent accessor with underscores, you access the parent property of the node, which is not what we're looking for. This also applies to the this accessor.