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REST API v0.2.0 Nodes
Nodes are standalone objects which represent a single question. A Node can be one of two types, AnswerableNode and NonAnswerableNode. All Nodes are answerable with the exception of the 'note' type. The type is defined by the Node's type_constraint property.
When a Node gets associated with a Survey, it gets wrapped in a SurveyNode. The SurveyNode can be thought of as a specific instance of a Node -- it is the linking object between the Node (i.e. question) and the Survey. This allows multiple Surveys to include a certain question while maintaining the ability to identify the question by a unique identifier, which simplifies the aggregation of answers to questions and makes the data easy to work with.
GET /api/v0/nodes
| Name | Type | Default | Description |
|---|---|---|---|
| offset | integer | 0 | The offset of the result set. |
| limit | integer | 100 | Limits the number of results in the result set. |
| order_by | string | created_on:DESC | A comma-delimited list of Node properties with order direction, e.g. title:ASC,type:DESC |
| type | string | Filters on the type_constraint property of the Node. |
|
| draw | integer | If included in the request, the draw parameter will be returned in the response unaltered. |
Note: All parameters are optional.
If there is an error, the response will contain a single error property containing the error message.
{
"limit": 4,
"offset": 5,
"nodes": [
{
"id": "8e6e6905-3d18-4230-87ce-435fd074d421",
"deleted": false,
"languages": [
"English"
],
"title": {
"English": "When did this occur?"
},
"hint": {
"English": ""
},
"allow_multiple": false,
"allow_other": false,
"type_constraint": "timestamp",
"logic": {},
"last_update_time": "2015-07-01T18:17:18.984452+00:00"
},
{
"id": "ef8edd1f-4850-41f2-9471-86189239ec64",
"deleted": false,
"languages": [
"English"
],
"title": {
"English": "Exterior Photograph"
},
"hint": {
"English": ""
},
"allow_multiple": false,
"allow_other": false,
"type_constraint": "photo",
"logic": {},
"last_update_time": "2015-07-01T18:17:18.984452+00:00"
},
{
"id": "f6a2536a-3f92-4e38-84e7-f22fcba49dba",
"deleted": false,
"languages": [
"English"
],
"title": {
"English": "Location"
},
"hint": {
"English": ""
},
"allow_multiple": false,
"allow_other": false,
"type_constraint": "location",
"logic": {},
"last_update_time": "2015-07-01T18:17:18.984452+00:00"
},
{
"id": "f81085ad-9e60-4128-ac53-aa3ac2f88fa7",
"deleted": false,
"languages": [
"English"
],
"title": {
"English": "Patient Birthdate"
},
"hint": {
"English": ""
},
"allow_multiple": false,
"allow_other": false,
"type_constraint": "date",
"logic": {},
"last_update_time": "2015-07-01T18:17:18.984452+00:00"
}
]
}/api/v0/nodes/<Node_UUID>
{
"id": "8e6e6905-3d18-4230-87ce-435fd074d421",
"deleted": false,
"languages": [
"English"
],
"title": {
"English": "When did this occur?"
},
"hint": {
"English": ""
},
"allow_multiple": false,
"allow_other": false,
"type_constraint": "timestamp",
"logic": {},
"last_update_time": "2015-07-01T18:17:18.984452+00:00"
}POST /api/v0/nodes
A Node (again, think 'question') can be one of several types, defined by its type_constraint value, which enforces the types of acceptable answer values:
NODE_TYPES = {
'text': TextQuestion,
'photo': PhotoQuestion,
'integer': IntegerQuestion,
'decimal': DecimalQuestion,
'date': DateQuestion,
'time': TimeQuestion,
'timestamp': TimestampQuestion,
'location': LocationQuestion,
'facility': FacilityQuestion,
'multiple_choice': MultipleChoiceQuestion,
'note': Note,
}
The allow_multiple property defines whether this Node (question) should accept multiple answers. Defaults to false.
The allow_other property defines whether this Node (question) should allow an 'other' answer option. Defaults to false.
{
"title": {
"English": "text_node"
},
"hint": {
"English": "Some test hint."
},
"type_constraint": "text",
"logic": {},
}{
"id": "d1091c27-ae98-4272-957f-f28c236fc832",
"deleted": false,
"languages": [
"English"
],
"title": {
"English": "text_node"
},
"hint": {
"English": "Some test hint."
},
"allow_multiple": false,
"allow_other": false,
"type_constraint": "text",
"logic": {},
"last_update_time": "2015-07-01T20:22:37.461764+00:00"
}Multiple Choice nodes have a choices property:
{
"title": {"English": "Which food is the tastiest?"},
"hint": {
"English": "Some test hint."
},
"allow_other": true,
"type_constraint": "multiple_choice",
"logic": {},
"choices": [
{
"choice_text": {
"English": "Bagel"
}
},
{
"choice_text": {
"English": "Burger"
}
}
]
}{
"id": "233616eb-d923-4b83-87af-620f011c4d34",
"deleted": false,
"title": {
"English": "Which food is the tastiest?"
},
"hint": {
"English": "Some test hint."
},
"choices": [
{
"choice_id": "d06ac0fb-0281-4ed4-8729-e79c08d6c8aa",
"choice_text": {
"English": "Bagel"
}
},
{
"choice_id": "7b66b5da-0fce-4dfd-8a65-d9fd67b69130",
"choice_text": {
"English": "Burger"
}
}
],
"allow_multiple": false,
"allow_other": true,
"type_constraint": "multiple_choice",
"logic": {},
"last_update_time": "2015-07-01T20:38:43.660554+00:00"
}DELETE /api/v0/nodes/<Node_UUID>
Delete requests have no response payload. A successful deletion will respond with an empty 204 No Content status code.
Note: Deletions are non-destructive; data is simply marked as deleted, and will no longer appear in standard queries.