Baby Buddy

A buddy for babies! Helps caregivers track sleep, feedings, diaper changes, tummy time and more to learn about and predict baby's needs without (as much) guess work.

Table of Contents

• Demo
• Deployment
  • AWS Elastic Beanstalk
  • Docker
  • Heroku
  • Manual
• Configuration
• Languages
• Import/Export
  • Export
  • Import
• API
  • Authentication
  • GET Method
  • OPTIONS Method
  • POST Method
  • PATCH Method
  • DELETE Method
• Contributing

Demo

A demo of Baby Buddy is available on Heroku. The demo instance resets every hour. Login credentials are:

• Username: admin
• Password: admin

Deployment

The default user name and password for Baby Buddy is admin/admin. For any deployment, log in and change the default admin password immediately.

Many of Baby Buddy's configuration settings can be controlled using environment variables - see Configuration for detailed information.

AWS Elastic Beanstalk

A basic Elastic Beanstalk configuration is provided in .ebextensions/babybuddy.config. The steps below are a rough guide to deployment. See Working with Python for detailed information.

1. Clone/download the Baby Buddy repo

    git clone https://github.com/babybuddy/babybuddy.git
   

2. Enter the cloned/downloaded directory

    cd babybuddy
   

3. Set (at least) the SECRET_KEY environment value in .ebextensions/babybuddy.config

   *See Configuration for other settings that can be controlled by environment variables.

4. Create an IAM user in AWS with EB, EC2, RDS and S3 privileges.

5. Initialize the Elastic Bean application (using the IAM user from the previous step)

    eb init -p python-3.6
   

6. Create/deploy the environment! 🚀

    eb create -db -db.engine postgres
   

The create command will also do an initial deployment. Run eb deploy to redeploy the app (e.g. if there are errors or settings are changed).

Docker

A Docker deployment requires Docker Engine v18.06.0+ and Docker Compose v1.22.0+ to create two containers: one for the database and one for the application.

The example docker-compose.example.yml file provided in this repository is intended for production deployments. Baby Buddy is deployed to Docker Hub as babybuddy/babybuddy so this is the only file needed for a Docker deployment with Docker Compose.

1. Copy the contents of docker-compose.example.yml as docker-compose.yml and set, at least, the ALLOWED_HOSTS and SECRET_KEY variables under services:app:environment.

   See Configuration for other settings that can be controlled by environment variables.

2. Build/run the application

    docker-compose up -d
   

The app should now be locally available at http://127.0.0.1:8000. See Docker's "Get Started" documentation for detailed information about deployment methods with Docker.

A secondary example file docker-compose.example.sqlite.yml is also available for a simpler SQLite-based deployment (the default example users PostgreSQL).

Heroku

For manual deployments to Heroku without using the deploy button, make sure to create the following settings before pushing:

heroku config:set DJANGO_SETTINGS_MODULE=babybuddy.settings.heroku
heroku config:set SECRET_KEY=<CHANGE TO SOMETHING RANDOM>
heroku config:set DISABLE_COLLECTSTATIC=1
heroku config:set TIME_ZONE=<DESIRED DEFAULT TIMEZONE>

See Configuration for other settings that can be controlled by heroku config:set.

And after an initial push, execute the following commands:

heroku run python manage.py migrate
heroku run python manage.py createcachetable

Manual

There are many ways to deploy Baby Buddy manually to any server/VPS. The basic requirements are Python, a web server, an application server, and a database.

Requirements

• Python 3.6+, pip, pipenv
• Web server (nginx, Apache, etc.)
• Application server (uwsgi, gunicorn, etc.)
• Database (sqlite, Postgres, MySQL, etc.)

Example deployment

This example assumes a 512MB VPS instance with Ubuntu 18.04. It uses Python 3.6+, nginx, uwsgi and sqlite and should be sufficient for a few users (e.g. two parents and 1+ child).

1. Install system packages

    sudo apt-get install python3 python3-pip nginx uwsgi uwsgi-plugin-python3 git libopenjp2-7-dev
   

2. Default python3 to python for this session

    alias python=python3
   

3. Install pipenv

    sudo -H pip3 install pipenv
   

4. Set up directories and files

    sudo mkdir /var/www/babybuddy
    sudo chown user:user /var/www/babybuddy
    mkdir -p /var/www/babybuddy/data/media
    git clone https://github.com/babybuddy/babybuddy.git /var/www/babybuddy/public
   

5. Move in to the application folder

    cd /var/www/babybuddy/public
   

6. Set pipenv to install locally.

    export PIPENV_VENV_IN_PROJECT=1
   

7. Initiate and enter the Python environment

    pipenv install --three
    pipenv shell
   

   Note: Python dependencies are locked on x86-64 architecture. Installs on other architectures (like Raspberry Pi's ARM) may result in a THESE PACKAGES DO NOT MATCH THE HASHES FROM Pipfile.lock! error. Add the --skip-lock flag to the above command to suppress this error (i.e.: pipenv install --three --dev --skip-lock).

8. Create a production settings file and set the SECRET_KEY and ALLOWED_HOSTS values

    cp babybuddy/settings/production.example.py babybuddy/settings/production.py
    editor babybuddy/settings/production.py
   

9. Initiate the application

    export DJANGO_SETTINGS_MODULE=babybuddy.settings.production
    python manage.py migrate
    python manage.py createcachetable
   

10. Set appropriate permissions on the database and data folder

     sudo chown -R www-data:www-data /var/www/babybuddy/data
     sudo chmod 640 /var/www/babybuddy/data/db.sqlite3
     sudo chmod 750 /var/www/babybuddy/data
    

11. Create and configure the uwsgi app

     sudo editor /etc/uwsgi/apps-available/babybuddy.ini
    

    Example config:

     [uwsgi]
     plugins = python3
     project = babybuddy
     base_dir = /var/www/babybuddy
    
     chdir = %(base_dir)/public
     virtualenv = %(chdir)/.venv
     module =  %(project).wsgi:application
     env = DJANGO_SETTINGS_MODULE=%(project).settings.production
     master = True
     vacuum = True
    

    See the uWSGI documentation for more advanced configuration details.

12. Symlink config and restart uWSGI:

     sudo ln -s /etc/uwsgi/apps-available/babybuddy.ini /etc/uwsgi/apps-enabled/babybuddy.ini
     sudo service uwsgi restart
    

13. Create and configure the nginx server

     sudo editor /etc/nginx/sites-available/babybuddy
    

    Example config:

     upstream babybuddy {
         server unix:///var/run/uwsgi/app/babybuddy/socket;
     }
    
     server {
         listen 80;
         server_name babybuddy.example.com;
    
         location / {
             uwsgi_pass babybuddy;
             include uwsgi_params;
         }
    
         location /media {
             alias /var/www/babybuddy/data/media;
         }
     }
    

    See the nginx documentation for more advanced configuration details.

14. Symlink config and restart NGINX:

     sudo ln -s /etc/nginx/sites-available/babybuddy /etc/nginx/sites-enabled/babybuddy
     sudo service nginx restart
    

15. That's it (hopefully)! 🎉

Configuration

Environment variables can be used to define a number of configuration settings. Baby Buddy will check the application directory structure for an .env file or take these variables from the system environment. System environment variables take precedence over the contents of an .env file.

• ALLOWED_HOSTS
• ALLOW_UPLOADS
• AWS_ACCESS_KEY_ID
• AWS_SECRET_ACCESS_KEY
• AWS_STORAGE_BUCKET_NAME
• DEBUG
• NAP_START_MAX
• NAP_START_MIN
• SECRET_KEY
• TIME_ZONE
• USE_24_HOUR_TIME_FORMAT

ALLOWED_HOSTS

Default: * (any)

This option may be set to a single host or comma-separated list of hosts (without spaces). This should always be set to a specific host or hosts in production deployments.

See also: Django's documentation on the ALLOWED_HOSTS setting

ALLOW_UPLOADS

Default: True

Whether or not to allow uploads (e.g. of Child photos). For some deployments (AWS, Heroku) this setting will default to False due to the lack of available persistent storage.

AWS_ACCESS_KEY_ID

Default: None

Required to access your AWS S3 bucket, should be uniquely generated per bucket for security.

See also: AWS_STORAGE_BUCKET_NAME

AWS_SECRET_ACCESS_KEY

Default: None

Required to access your AWS S3 bucket, should be uniquely generated per bucket for security.

See also: AWS_STORAGE_BUCKET_NAME

AWS_STORAGE_BUCKET_NAME

Default: None

If you would like to use AWS S3 for storage on ephemeral storage platforms like Heroku you will need to create a bucket and add it's name. See django-storages' Amazon S3 documentation.

DEBUG

Default: False

When in debug mode, Baby Buddy will print much more detailed error information for exceptions. This setting should be False in production deployments.

See also Django's documentation on the DEBUG setting.

NAP_START_MAX

Default: 18:00

The maximum start time (in the instance's time zone) before which a sleep entry is consider a nap. Expects the 24-hour format %H:%M.

NAP_START_MIN

Default: 06:00

The minimum start time (in the instance's time zone) after which a sleep entry is considered a nap. Expects the 24-hour format %H:%M.

SECRET_KEY

Default: None

A random, unique string must be set as the "secret key" before Baby Buddy can be deployed and run.

See also Django's documentation on the SECRET_KEY setting.

TIME_ZONE

Default: Etc/UTC

The default time zone to use for the instance. See List of tz database time zones for all possible values. This value can be overridden per use from the user settings form.

USE_24_HOUR_TIME_FORMAT

Default: False

Whether to force 24-hour time format for locales that do not ordinarily use it (e.g. en). Support for this feature must implemented on a per-locale basis. See format files under babybuddy/formats for supported locales.

Note: This value for this setting is interpreted as a boolean from a string using Python's built-in strtobool tool. Only certain strings are supported (e.g. "True" for True and "False" for False), other unrecognized strings will cause a ValueError and prevent Baby Buddy from loading.

Languages

Baby Buddy includes translation support as of v1.2.2. Language can be set on a per-user basis from the user settings page (/user/settings/). See CONTRIBUTING.md for information about how to create/update translations.

Available languages

🇺🇸 English (U.S.) (base)

🇫🇷 French

🇩🇪 German

🇲🇽 🇪🇸 Spanish

🇸🇪 Swedish

🇹🇷 Turkish

Import/Export

Baby Buddy uses the django-import-export application to provide import and export functionality.

Export

Export actions are accessible from Baby Buddy's "Database Admin" area (the Django admin interface). For example, to export all diaper change entries from Baby Buddy as an Excel file:

1. Log in as a user with "staff" access.

2. From the user menu, click "Database Admin" under the "Site" heading.

3. Click "Diaper Changes" in the list of data types.

4. Click the "Export" button above the filters list on the right side of the screen.

5. Select the "xlxs" format and click "Submit"

Note: any applied filters will also filter the exported entries. Alternatively, on the Diaper Change list screen (step 3 above), it is possible to select one or many individual records and select "Export selected Diaper Changes" from the "Actions" list.

Import

Import actions are accessible from Baby Buddy's "Database Admin" area (the Django admin interface). From the list of entry types in the Database Admin, select the type to import and click the "Import" button on the list page. The import screen for a particular type will list the fields generally expected to be present for an import. Multiple file types -- including csv, xlsx, etc. -- are supported for the import.

The import pages do not provide detailed information about the required data and formats. When an import is attempted, all rows will be checked for errors and any issues will be reported on screen and will need to be resolved before the import can be performed.

See the example import files used for tests to get an idea of the expected data format.

API

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/scehma 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).

Contributing

Contributions are welcome! See CONTRIBUTING.md for detailed information about how to contribute to Baby Buddy.