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fedspendingtransparency
187 Stars 78 Forks Creative Commons Zero v1.0 Universal 16.8K Commits 39 Opened issues

Description

Server application to serve U.S. federal spending data via a RESTful API

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USAspending API

Code style: black Build Status Test Coverage Code Climate

This API is utilized by USAspending.gov to obtain all federal spending data which is open source and provided to the public as part of the DATA Act.

USAspending Landing Page

Creating a Development Environment

Ensure the following dependencies are installed and working prior to continuing:

Requirements

If not using Docker:

Using Docker is recommended since it provides a clean environment. Setting up your own local environment requires some technical abilities and experience with modern software tools.

  • Command line package manager
    • Windows' WSL bash uses
      apt-get
    • MacOS users will use
      Homebrew
    • Linux users already know their package manager (yum, apt, pacman, etc.)
  • PostgreSQL
    version 10.x (with a dedicated
    data_store_api
    database)
  • Elasticsearch
    version 7.1
  • Python 3.7 environment
    • Highly recommended to use a virtual environment. There are various tools and associated instructions depending on preferences
    • See Required Python Libraries for an example using
      pyenv

Cloning the Repository

Now, navigate to the base file directory where you will store the USAspending repositories

$ mkdir -p usaspending && cd usaspending
$ git clone https://github.com/fedspendingtransparency/usaspending-api.git
$ cd usaspending-api

Database Setup

There are three documented options for setting up a local database in order to run the API:

  1. Local Empty DB. Use your own local postgres database for the API to use.
  2. Containerized Empty DB. Create an empty directory on your localhost where all the database files will persist and use the docker-compose file to bring up a containerized postgres database.
  3. Local Populated DB. Download either the whole database or a database subset from the USAspending website.

Option 1: Using a Locally Hosted Postgres Database

Create a Local postgres database called 'datastoreapi' and either create a new username and password for the database or use all the defaults. For help, consult: - Postgres Setup Help

Make sure to grant whatever user you created for the data_store api database superuser permissions or some scripts will not work:

postgres=# ALTER ROLE <> WITH SUPERUSER;

Option 2: Using the Docker Compose Postgres Database

See below for basic setup instructions. For help with Docker Compose: - Docker Compose

Database Setup and Initialization with Docker Compose
  • None of these commands will rebuild a Docker image! Use

    --build
    if you make changes to the code or want to rebuild the image before running the
    up
    steps.

  • If you run a local database, set

    POSTGRES_HOST
    in
    .env
    to
    host.docker.internal
    .
    POSTGRES_PORT
    should be changed if it isn't 5432.
    • docker-compose up usaspending-db
      will create and run a Postgres database.
    • docker-compose run --rm usaspending-manage python3 -u manage.py migrate
      will run Django migrations: https://docs.djangoproject.com/en/2.2/topics/migrations/.
    • docker-compose run --rm usaspending-manage python3 -u manage.py load_reference_data
      will load essential reference data (agencies, program activity codes, CFDA program data, country codes, and others).
    • docker-compose run --rm usaspending-manage python3 -u manage.py matview_runner --dependencies
      will provision the materialized views which are required by certain API endpoints.
Manual Database Setup
  • docker-compose.yaml
    contains the shell commands necessary to set up the database manually, if you prefer to have a more custom environment.

Option 3: Downloading the database or a subset of the database and loading it into PostgreSQL

For further instructions on how to download, use, and setup the database using a subset of our data please go to:

USAspending Database Download

Elasticsearch Setup

Some of the API endpoints reach into Elasticsearch for data.

  • docker-compose up usaspending-es
    will create and start a single-node Elasticsearch cluster, using the
    ES_CLUSTER_DIR
    specified in the
    .env
    configuration file. We recommend using a folder outside of the usaspending-api project directory so it does not get copied to other containers.
  • The cluster should be reachable via at http://localhost:9200 ("You Know, for Search").

  • Optionally, to see log output, use

    docker-compose logs usaspending-es
    (these logs are stored by docker even if you don't use this).

Running the API

docker-compose up usaspending-api
  • You can update environment variables in
    settings.py
    (buckets, elasticsearch, local paths) and they will be mounted and used when you run this.

The application will now be available at

http://localhost:8000
.

Note: if the code was run outside of Docker then compiled Python files will potentially trip up the docker environment. A useful command to run for clearing out the files on your host is:

find . | grep -E "(__pycache__|\.pyc|\.pyo$)" | xargs rm -rf

Using the API

In your local development environment, available API endpoints may be found at

http://localhost:8000/docs/endpoints

Deployed production API endpoints and docs are found by following links here:

https://api.usaspending.gov

Loading Data

Note: it is possible to run ad-hoc commands out of a Docker container once you get the hang of it, see the comments in the Dockerfile.

For details on loading reference data, DATA Act Broker submissions, and current USAspending data into the API, see loading_data.md.

For details on how our data loaders modify incoming data, see data_reformatting.md.

Running Tests

Test Setup

To run all tests in the docker services run

docker-compose run --rm usaspending-test

To run tests locally and not in the docker services, you need:

  1. Postgres A running PostgreSQL database server (See Database Setup above)
  2. Elasticsearch A running Elasticsearch cluster (See Elasticsearch Setup above)
  3. Required Python Libraries Python package dependencies downloaded and discoverable (See below)
  4. Environment Variables Tell python where to connect to the various data stores (See below)

Once these are satisfied, run:

(usaspending-api) $ pytest

Required Python Libraries

Create and activate the virtual environment using

venv
, and ensure the right version of Python 3.7.x is being used (the latest RHEL package available for
python36u
: as of this writing)
$ pyenv install 3.7.2
$ pyenv local 3.7.2
$ python -m venv .venv/usaspending-api
$ source .venv/usaspending-api/bin/activate

Your prompt should then look as below to show you are in the virtual environment named

usaspending-api
(to exit that virtual environment, simply type
deactivate
at the prompt
).
(usaspending-api) $

pip

install
application dependencies
(usaspending-api) $ pip install -r requirements/requirements.txt

Environment Variables

Create a

.envrc
file in the repo root, which will be ignored by git. Change credentials and ports as-needed for your local dev environment.
export DATABASE_URL=postgres://usaspending:[email protected]:5432/data_store_api
export ES_HOSTNAME=http://localhost:9200
export DATA_BROKER_DATABASE_URL=postgres://admin:[email protected]:5435/data_broker

If

direnv
does not pick this up after saving the file, type
$ direnv allow

Alternatively, you could skip using

direnv
and just export these variables in your shell environment.

Including Broker Integration Tests

Some automated integration tests run against a Broker database. If the dependencies to run such integration tests are not satisfied, those tests will bail out and be marked as Skipped. (You can see messages about those skipped tests by adding the

-rs
flag to pytest, like:
pytest -rs
)

To satisfy these dependencies and include execution of these tests, do the following: 1. Ensure you have

Docker
installed and running on your machine 1. Ensure the

Broker
source code is checked out alongside this repo at
../data-act-broker-backend
1. Ensure you have the
DATA_BROKER_DATABASE_URL
environment variable set, and pointing to a live PostgreSQL server (no database required) 1. Ensure you have built the
Broker
backend Docker image by running:
    (usaspending-api) $ docker build -t dataact-broker-backend ../data-act-broker-backend

NOTE: Broker source code should be re-fetched and image rebuilt to ensure latest integration is tested

Re-running the test suite using

pytest -rs
with these dependencies satisfied should yield no more skips of the broker integration tests.

Contributing

To submit fixes or enhancements, or to suggest changes, see CONTRIBUTING.md

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