The payload

An interesting feature of associations is that it allows for the use of nested data. By loading data for the questionnaire and its steps and questions as a single JSON object, the child's steps and questions association will be populated too. For example, take a look at this JSON:

{
    "id": 1,
    "title": "Quiz Questions!"
    "introduction": "Welcome!",
    "conclusion": "Thanks!",
    "steps": [
        {
            "id": 1,
            "title": "Round 1"
            "introduction": "Welcome to Round One!",
            "questionnaireId": 1,
            "questions": [{
                "id": 1,
                "questionText": "Turku is the third largest city by population of which European country?",
                "required": true,
                "stepId": 1,
                "type": "textfield"
            }],
        }
    ]
}

This object includes data for the questionnaire with an array of child steps. The steps have their own array of questions, as shown here:

Questionnaire...