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...