DDP_backend

Django application for the DDP platform's management backend. Exposes API endpoints for the management frontend to communicate with, for the purposes of

• Onboarding an NGO client
• Adding users from the client-organization
• Creating a client's workspace in our Airbyte installation
• Configuring that workspace i.e. setting up sources, destinations and connections
• Configuring data ingest jobs in our Prefect setup
• Connecting to the client's dbt GitHub repository
• Configuring dbt run jobs in our Prefect setup

Development conventions

Api end points naming

• REST conventions are being followed.
• CRUD end points for a User resource would look like:
  • GET /api/users/
  • GET /api/users/user_id
  • POST /api/users/
  • PUT /api/users/:user_id
  • DELETE /api/users/:user_id
• Route parameteres should be named in snake_case as shown above.

Ninja api docs

• All api docs are at http://localhost:8002/api/docs

Code style

• Pep8 has been used to standardized variable names, classes, module names etc.
• Pylint is the linting tool used to analyze the code as per Pep8 style.
• Black is used as the code formatter.

Setting up your vscode env

• Recommended IDE is VsCode.
• Install the pylint extension in vscode and enable it.
• Set the default format provider in vscode as black
• Update the vscode settings.json as follows
  { "editor.defaultFormatter": null, "python.linting.enabled": true, "python.formatting.provider": "black", "editor.formatOnSave": true }

Setup pre-commit and run hooks

• Run "pre-commit install" after activating your virtual env
• Run "pre-commit run --all-files" to run the formatter

Running celery

• In your virtual environment run:
  celery -A ddpui worker -n ddpui
• For windows run:
  celery -A ddpui worker -n ddpui -P solo
• To start celery beat run:
  celery -A ddpui beat

Setup instructions

Step 1: Create a Python Virtual Environment

• pyenv local 3.10

• pyenv exec python -m venv venv

• source venv/bin/activate

• pip install --upgrade pip

• pip install -r requirements.txt

Step 2: Create the .env file

• create .env from .env.template

Step 3: Create SQL Database

• create a SQL database and populate its credentials into .env

• You can use a postgresql docker image for local development

docker run --name postgres-db -e POSTGRES_PASSWORD=<password> -p 5432:5432 -d <db name>

• Add the environment variable to .env

DBNAME=<db name>
DBHOST=localhost
DBPORT=5432
DBUSER=postgres
DBPASSWORD=<password>
DBADMINUSER=postgres
DBADMINPASSWORD=<password>

Step 4: Install Airbyte

• Open a new terminal
• Start Airbyte and populate connection info in .env

AIRBYTE_SERVER_HOST=
AIRBYTE_SERVER_PORT=
AIRBYTE_SERVER_APIVER=
AIRBYTE_API_TOKEN= <token> # base64 encryption of username:password. Default username and password is airbyte:password and token will be YWlyYnl0ZTpwYXNzd29yZA==
AIRBYTE_DESTINATION_TYPES=

Step 5: Install Prefect and Start Prefect Proxy

• Start Prefect Proxy and populate connection info in .env

PREFECT_PROXY_API_URL=

Step 6: Create secrets directory

• Set DEV_SECRETS_DIR in .env unless you want to use Amazon's Secrets Manager

Step 7: Install DBT

• Open a new terminal

• Create a local venv, install dbt and put its location into DBT_VENV in .env

pyenv local 3.10

pyenv exec python -m venv <env-name>

source <env-name>/bin/activate

python -m pip install \
  dbt-core \
  dbt-postgres \
  dbt-bigquery

• Create empty directories for CLIENTDBT_ROOT

CLIENTDBT_ROOT=
DBT_VENV=<env-name>/bin/activate

Step 8: Add SIGNUPCODE and FRONTEND_URL

• The SIGNUPCODE in .env is for signing up using the frontend. If you are running the frontend, set its URL in FRONTEND_URL

Step 9: Start Backend

DJANGOSECRET=

• Create logs folder in ddpui

• create whitelist.py from .whitelist.template.py in ddpui > assets folder

• Run DB migrations python manage.py migrate

• Seed the DB python manage.py loaddata seed/*.json

• Create the system user python manage.py create-system-orguser

• Start the server python manage.py runserver

Step 10: Create first org and user

• Run python manage.py createorganduser <Org Name> <Email address>

Using Docker

Follow the steps below:

Step 1: Install Docker and Docker Compose

• Install docker
• Install docker-compose

Step 2: Create .env file

• create .env from .env.template inside the Docker folder

Step 3: Create whitelist.py file

• Copy the file in ddpui/assets/ to Docker/mount

Step 4: Build the image

If using M1-based MacBook run this before building image export DOCKER_DEFAULT_PLATFORM=linux/amd64

• docker build -f Docker/Dockerfile.main --build-arg BUILD_DATE=$(date -u +'%Y-%m-%dT%H:%M:%SZ') -t dalgo_backend_main_image:0.1 . This will create the main image
• docker build -f Docker/Dockerfile.dev.deploy --build-arg BUILD_DATE=$(date -u +'%Y-%m-%dT%H:%M:%SZ') -t dalgo_backend:0.1 .

Step 5: Start the other applications

• Follow Step 4 and Step 5 in the Setup Instructions

Step 5: Start Backend

• docker-compose -f Docker/docker-compose.dev.yml up