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• Drop V: 7.0.0.0 Mac Os X

Note

We discourage building and using PostgREST on Alpine Linux because of a reported GHC memory leak on that platform.

To help with development, you’ll need to build from source. Stack makes it easy. It will install any necessary Haskell dependencies on your system.

• Install Stack for your platform

• Install Library Dependencies

  Operating System	Dependencies
  Ubuntu/Debian	libpq-dev, libgmp-dev, zlib1g-dev
  CentOS/Fedora/Red Hat	postgresql-devel, zlib-devel, gmp-devel
  BSD	postgresql95-client
  OS X	libpq, gmp

• Build and install binary

Note

• If building fails and your system has less than 1GB of memory, try adding a swap file.
• –install-ghc flag is only needed for the first build and can be omitted in the subsequent builds.

• Check that the server is installed: postgrest--help.

To properly run the test suite, you need a Postgres database that the tests can run against. There are several ways to set up this database.

Testing with a temporary database¶

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If you have Postgres installed locally (initdb, pg_ctl and psql should be on your PATH, no server needs to be running), you can run the test suite against a temporary database:

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The with_tmp_db script will set up a new Postgres cluster in a temporary directory, set the required environment variables and run the command that you passed it as an argument, stacktest in the example above. When the command is done, the temporary database is torn down and deleted again.

Manually creating the Test Database¶

To manually create a database for testing, use the test creation script create_test_database in the test/ folder.

The script expects the following parameters:

Use the connection URI to specify the user, password, host, and port. Do not provide the database in the connection URI. The PostgreSQL role you are using to connect must be capable of creating new databases.

The database_name is the name of the database that stacktest will connect to. If the database of the same name already exists on the server, the script will first drop it and then re-create it.

Optionally, specify the database user stacktest will use. The user will be given necessary permissions to reset the database after every test run.

If the user is not specified, the script will generate the role name postgrest_test_ suffixed by the chosen database name, and will generate a random password for it.

Optionally, if specifying an existing user to be used for the test connection, one can specify the password the user has.

The script will return the db uri to use in the tests–this uri corresponds to the db-uri parameter in the configuration file that one would use in production.

Generating the user and the password allows one to create the database and run the tests against any PostgreSQL server without any modifications to the server. (Such as allowing accounts without a password or setting up trust authentication, or requiring the server to be on the same localhost the tests are run from).

Running the Tests with the manually created database¶

To run the tests, one must supply the database uri in the environment variable POSTGREST_TEST_CONNECTION.

Typically, one would create the database and run the test in the same command line, using the postgres superuser:

For repeated runs on the same database, one should export the connection variable:

If the environment variable is empty or not specified, then the test runner will default to connection uri

This connection assumes the test server on the localhost:code: with the user postgrest_test without the password and the database of the same name.

Destroying the Database¶

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The test database will remain after the test, together with four new roles created on the PostgreSQL server. To permanently erase the created database and the roles, run the script test/delete_test_database, using the same superuser role used for creating the database:

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Testing with Docker¶

The ability to connect to non-local PostgreSQL simplifies the test setup. One elegant way of testing is to use a disposable PostgreSQL in docker.

For example, if local development is on a mac with Docker for Mac installed:

Additionally, if one creates a docker container to run stack test (this is necessary on Mac OS Sierra with GHC below 8.0.1, where stacktest fails), one can run PostgreSQL in a separate linked container, or use the locally installed PostgreSQL app.

Build the test container with test/Dockerfile.test:

The first run of the test container will take a long time while the dependencies get cached. Creating the ~/.stack-linux folder and mapping it as a volume into the container ensures that we can run the container in disposable mode and not worry about subsequent runs being slow. .stack-work-docker is also mapped into the container and must be specified when using stack from Linux, not to interfere with the .stack-work for local development. (On Sierra, stackbuild works, while stacktest fails with GHC 8.0.1).

Linked containers:

Stack test in Docker for Mac, PostgreSQL app on mac: