Looping over arrays

The ability to loop over arrays of data can be very useful in constructing a response. Some of the arrays typically in a response are:

• the elements of path

• the headers in the request

• an array of query parameters if there are more than one with the same name

• a JSON array extracted from the body of a request

The following block is used to loop over an array:

• {{#each}} {{else}} {{/each}}

You can use the @index, @key and this keywords to determine the index, key and value of the object under the iterator. You can use @last keyword to determine if the current object is the last one in the array.

Example 1:

{{#each Request.Header}}
	{{@index}} : {{@key}} : {{this}}
{{else}}
	No Request Headers were provided
{{/each}}

Example 2:

Using looping and conditional logic you can build our a JSON (or XML) response:

Given the following request body

{
    "people": [
        {
            "name": "John",
            "surname": "Doe",
            "age": 30
        },
        {
            "name": "Jane",
            "surname": "Lee",
            "age": 29
        }
    ]
}

And creating the following simulation body template

{ "ages":
    [
        {{#each (Request.Body 'JSONpath' '$.people') }}
        {{this.age}}
        {{#unless @last}},{{/unless}}
        {{/each}}
    ]
}

The result generated from the template and sent back in the body would be this:

{
    "ages": [
        30,
        29
    ]
}

Follow a tutorial here to learn more about looping