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mybuddy/docs/API.md

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API

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Baby Buddy uses the Django REST Framework (DRF) to provide a REST API.

The only requirement for (most) requests is that the Authorization header is set as described in the Authentication section. The one exception is the /api endpoint, which lists all available endpoints.

Currently, the following endpoints are available for GET, OPTIONS, and POST requests:

  • /api/children/
  • /api/changes/ (Diaper Changes)
  • /api/feedings/
  • /api/notes/
  • /api/sleep/
  • /api/temperature/
  • /api/timers/
  • /api/tummy-times/
  • /api/weight/

Authentication

By default, the TokenAuthentication and SessionAuthentication classes are enabled. Session authentication covers local API requests made by the application itself. Token authentication allows external requests to be made.

❗ In a production environment, token authentication should only be used for API calls to an https endpoint. ❗

Each user is automatically assigned an API key that can be used for token authentication. This key can be found on the User Settings page for the logged in the user. To use a key for an API request, set the request Authorization header to Token <user-key>. E.g.

Authorization: Token 2h23807gd72h7hop382p98hd823dw3g665g56

If the Authorization header is not set or the key is not valid, the API will return 403 Forbidden with additional details in the response body.

Schema

API schema information in the OpenAPI format can be found in the openapi-schema.yml file in the project root. A live version is also available at the /api/schema path of a running instance.

GET Method

Request

The limit and offset request parameters can be used to limit and offset the results set respectively. For example, the following request will return five diaper changes starting from the 10th diaper change entry:

curl -X GET 'https://[...]/api/changes/?limit=5&offset=10' -H 'Authorization: Token [...]'
{
    "count": <int>,
    "next": "https://[...]/api/changes/?limit=5&offset=15",
    "previous": "https://[...]/api/changes/?limit=5&offset=5",
    "results": [...]
}

Field-based filters for specific endpoints can be found the in the filters field of the OPTIONS response for specific endpoints.

Single entries can also be retrieved by adding the ID (or in the case of a Child entry, the slug) of a particular entry:

 curl -X GET https://[...]/api/children/gregory-hill/ -H 'Authorization: Token [...]'
 {
    "id":3,
    "first_name":"Gregory",
    "last_name":"Hill",
    "birth_date":"2020-02-11",
    "slug":"gregory-hill",
    "picture":null
}
curl -X GET https://[...]/api/sleep/1/ -H 'Authorization: Token [...]'
{
 "id":480,
 "child":3,
 "start":"2020-03-12T21:25:28.916016-07:00",
 "end":"2020-03-13T01:34:28.916016-07:00",
 "duration":"04:09:00",
 "nap":false
}

Response

Returns JSON data in the response body in the following format:

{
    "count":<int>,
    "next":<url>,
    "previous":<url>,
    "results":[{...}]
}
  • count: Total number of records (in the database, not just the response).
  • next: URL for the next set of results.
  • previous: URL for the previous set of results.
  • results: An array of the results of the request.

For single entries, returns JSON data in the response body keyed by model field names. This will vary between models.

OPTIONS Method

Request

All endpoints will respond to an OPTIONS request with detailed information about the endpoint's purpose, parameters, filters, etc.

Response

Returns JSON data in the response body describing the endpoint, available options for POST requests, and available filters for GET requests. The following example describes the /api/children endpoint:

{
    "name": "Child List",
    "renders": [
        "application/json",
        "text/html"
    ],
    "parses": [
        "application/json",
        "application/x-www-form-urlencoded",
        "multipart/form-data"
    ],
    "actions": {
        "POST": {
            "id": {
                "type": "integer",
                "required": false,
                "read_only": true,
                "label": "ID"
            },
            [...]
        }
    },
    "filters": [
        "first_name",
        "last_name",
        "slug"
    ]
}

POST Method

Request

To add new entries for a particular endpoint, send a POST request with the entry data in JSON format in the request body. The Content-Type header for POST request must be set to application/json.

Regular sanity checks will be performed on relevant data. See the OPTIONS response for a particular endpoint for details on required fields and data formats.

Timer Field

The "timer" field is a special field available for POST operations to model endpoints supporting duration (Feeding, Sleep, Tummy Time). When the "timer" field is set in the request, the start and end fields will be filled in automatically using the start and end values from the Timer (the Timer will be stopped if it is currently running).

Additionally, if the Timer has a Child relationship, the child field will be filled in automatically use the child value from the Timer.

If the "timer" field is set, it's values will always override the relevant fields in the request. E.g. if a POST request is sent with both the timer and end fields, the value for the end field will be ignored and replaced by the Timer's end value. The same applies for start and child. These fields can all be left out of the request when the Timer is provided, otherwise they are required fields.

Response

Returns JSON data in the response body describing the added/updated instance or error details if errors exist. Errors are keyed by either the field in error or the general string non_field_errors (usually when validation involves multiple fields).

PATCH Method

Request

To update existing entries, send a PATCH request to the single entry endpoint for the entry to be updated. The Content-Type header for PATCH request must be set to application/json. For example, to update a Diaper Change entry with ID 947 to indicate a "wet" diaper only:

curl -X PATCH \
    -H 'Authorization: Token [...]' \
    -H "Content-Type: application/json" \
    -d '{"wet":1, "solid":0}' \
    https://[...]/api/changes/947/

Regular sanity checks will be performed on relevant data. See the OPTIONS response for a particular endpoint for details on required fields and data formats.

Response

Returns JSON data in the response body describing the added/updated instance or error details if errors exist. Errors are keyed by either the field in error or the general string non_field_errors (usually when validation involves multiple fields).

DELETE Method

Request

To delete an existing entry, send a DELETE request to the single entry endpoint to be deleted. For example, to delete a Diaper Change entry with ID 947:

curl -X DELETE https://[...]/api/changes/947/ -H 'Authorization: Token [...]'

Response

Returns an empty response with HTTP status code 204 on success, or a JSON encoded error detail if an error occurred (e.g. {"detail":"Not found."} if the requested ID does not exist).