async_pg example

This example illustrates

tokio_postgres
use of tokio_pg_mapper for postgres data mapping
deadpool_postgres for connection pooling
dotenv + config for configuration

Instructions

NOTE:

You may need to ensure that you are running the commands with the correct SQL user. On many Linux distributions you may prefix the shell commands with sudo -u postgres

Create database user
```
createuser -P test_user
```
Enter a password of your choice. The following instructions assume you used testing as password.

This step is optional and you can also use an existing database user for that. Just make sure to replace test_user by the database user of your choice in the following steps and change the .env file containing the configuration accordingly.

An alternative using SQL:
```
CREATE USER test_user WITH PASSWORD 'testing';
```

Create database

createdb -O test_user testing_db

An alternative using SQL:

CREATE DATABASE testing_db OWNER test_user;

Initialize database
```
psql -f sql/schema.sql testing_db
```
This step can be repeated and clears the database as it drops and recreates the schema testing which is used within the database.

Grant privileges to new user

GRANT ALL PRIVILEGES ON SCHEMA testing TO test_user;
GRANT ALL PRIVILEGES ON ALL TABLES IN SCHEMA testing TO test_user;
GRANT ALL PRIVILEGES ON ALL SEQUENCES IN SCHEMA testing TO test_user;

Create .env file:

SERVER_ADDR=127.0.0.1:8080
PG__USER=test_user
PG__PASSWORD=testing
PG__HOST=127.0.0.1
PG__PORT=5432
PG__DBNAME=testing_db
PG__POOL_MAX_SIZE=16

Run the server:
```
cargo run
```

Using a different terminal send an HTTP POST request to the running server:

echo '{"email": "ferris@thecrab.com", "first_name": "ferris", "last_name": "crab", "username": "ferreal"}' | http -f --json --print h POST http://127.0.0.1:8080/users

...or using curl...

curl -i -d '{"email": "ferris@thecrab.com", "first_name": "ferris", "last_name": "crab", "username": "ferreal"}' -H 'Content-Type: application/json' http://127.0.0.1:8080/users

A unique constraint exists for username, so sending this request twice will return an internal server error (HTTP 500).

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async_pg example

This example illustrates

Instructions

NOTE:

2.4 KiB

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